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142-399: The Markagunt Plateau is in southern Utah in the counties Iron County , Garfield County and Kane County . Cedar City lies west and Kanab south of the volcanic field, which is crossed by Utah State Route 14 , Utah State Route 143 and Utah State Route 148 . Towns in the area include Duck Creek Village and Mammoth Creek. The volcanic field is on a plateau bordered to the south by

284-658: A State of Deseret . The Mormon settlements provided pioneers for other settlements in the West. Salt Lake City became the hub of a "far-flung commonwealth" of Mormon settlements. With new church converts coming from the East and around the world, Church leaders often assigned groups of church members as missionaries to establish other settlements throughout the West. They developed irrigation to support fairly large pioneer populations along Utah's Wasatch front (Salt Lake City, Bountiful and Weber Valley, and Provo and Utah Valley). Throughout

426-555: A Berriasian–Barremian warm-dry phase, an Aptian–Santonian warm-wet phase, and a Campanian–Maastrichtian cool-dry phase. As in the Cenozoic, the 400,000 year eccentricity cycle was the dominant orbital cycle governing carbon flux between different reservoirs and influencing global climate. The location of the Intertropical Convergence Zone (ITCZ) was roughly the same as in the present. The cooling trend of

568-653: A Mormon missionary for thirteen years, and a Salt Lake City newspaper owner, finally left Utah and wrote The Rocky Mountain Saints . His book gives a witnessed account of life in Utah, both the good and the bad. He finally left Utah and Mormonism after financial ruin occurred when Brigham Young sent Stenhouse to relocate to Ogden, Utah, according to Stenhouse, to take over his thriving pro-Mormon Salt Lake Telegraph newspaper. In addition to these testimonies, The Confessions of John D. Lee , written by John D. Lee—alleged "Scapegoat" for

710-615: A geologic signature associated with the mass extinction that lies between the Mesozoic and Cenozoic Eras . The Cretaceous as a separate period was first defined by Belgian geologist Jean d'Omalius d'Halloy in 1822 as the Terrain Crétacé , using strata in the Paris Basin and named for the extensive beds of chalk ( calcium carbonate deposited by the shells of marine invertebrates , principally coccoliths ), found in

852-451: A major reason for poor air quality in Utah . On March 18, 2020, Utah suffered a 5.7 magnitude earthquake originating 3.7 mi (6.0 km) northeast of Magna, near Salt Lake City. Utah is known for its natural diversity and is home to features ranging from arid deserts with dunes to thriving pine forests in mountain valleys. It is a rugged and geographically diverse state at the convergence of three distinct geological regions:

994-465: A regiment of California volunteers in 1862. Connor established Fort Douglas just 3 miles (4.8 km) east of Salt Lake City and encouraged his people to discover mineral deposits to bring more non-Mormons into the territory. Minerals were discovered in Tooele County and miners began to flock to the territory. Beginning in 1865, Utah's Black Hawk War developed into the deadliest conflict in

1136-674: A straight shell, flourished in the seas along with reef-building rudist clams. Inoceramids were also particularly notable among Cretaceous bivalves, and they have been used to identify major biotic turnovers such as at the Turonian-Coniacian boundary. Predatory gastropods with drilling habits were widespread. Globotruncanid foraminifera and echinoderms such as sea urchins and starfish (sea stars) thrived. Ostracods were abundant in Cretaceous marine settings; ostracod species characterised by high male sexual investment had

1278-564: A ~0.6 °C increase in temperature. The latter warming interval, occurring at the very end of the Cretaceous, was triggered by the activity of the Deccan Traps. The LKEPCI lasted into the Late Palaeocene , when it gave way to another supergreenhouse interval. The production of large quantities of magma, variously attributed to mantle plumes or to extensional tectonics , further pushed sea levels up, so that large areas of

1420-601: Is a SNOTEL weather station located near the Utah State Route 14 junction with Utah State Route 148 , just south of Blowhard Mountain . Midway Valley sits at an elevation of 9800 feet (2987 m) and has a subalpine climate ( Köppen Dfc ). There is another SNOTEL weather station north of Midway Valley along the Brian Head-Panguitch Lake Scenic Byway , roughly halfway between Panguitch Lake and Brian Head . Volcanism in

1562-614: Is a landlocked state in the Mountain West subregion of the Western United States . It is one of the Four Corners states, sharing a border with Arizona , Colorado , and New Mexico . It also borders Wyoming to its northeast, Idaho to its north, and Nevada to its west. In comparison to all the U.S. states and territories, Utah, with a population of just over three million, is the 13th largest by area ,

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1704-619: Is found in England, northern France, the low countries , northern Germany , Denmark and in the subsurface of the southern part of the North Sea . Chalk is not easily consolidated and the Chalk Group still consists of loose sediments in many places. The group also has other limestones and arenites . Among the fossils it contains are sea urchins , belemnites , ammonites and sea reptiles such as Mosasaurus . In southern Europe,

1846-641: Is just over the Nevada state line in the southern Snake Range. One of western Utah's most impressive, but least visited attractions is Notch Peak , the tallest limestone cliff in North America, located west of Delta . Much of the scenic southern and southeastern landscape (specifically the Colorado Plateau region) is sandstone , specifically Kayenta sandstone and Navajo sandstone . The Colorado River and its tributaries wind their way through

1988-537: Is the central feature of protected state and federal parks such as Arches , Bryce Canyon , Canyonlands , Capitol Reef , and Zion national parks, Cedar Breaks , Grand Staircase–Escalante , Hovenweep , and Natural Bridges national monuments, Glen Canyon National Recreation Area (site of the popular tourist destination, Lake Powell ), Dead Horse Point and Goblin Valley state parks, and Monument Valley . The Navajo Nation also extends into southeastern Utah, and

2130-541: Is the lowest point in the state, at 2,000 feet (610 m). The northernmost portion of the Mojave Desert is also located in this area. Dixie is quickly becoming a popular recreational and retirement destination, and the population is growing rapidly. Although the Wasatch Mountains end at Mount Nebo near Nephi , a complex series of mountain ranges extends south from the southern end of the range down

2272-617: Is the ninth and longest geological period of the entire Phanerozoic . The name is derived from the Latin creta , ' chalk ', which is abundant in the latter half of the period. It is usually abbreviated K , for its German translation Kreide . The Cretaceous was a period with a relatively warm climate , resulting in high eustatic sea levels that created numerous shallow inland seas . These oceans and seas were populated with now- extinct marine reptiles , ammonites , and rudists , while dinosaurs continued to dominate on land. The world

2414-475: Is the only state where a majority of the population belongs to a single church. The LDS Church greatly influences Utahn culture, politics, and daily life, though since the 1990s the state has become more religiously diverse as well as secular. Utah has a highly diversified economy , with major sectors including transportation, education , information technology and research, government services, mining, multi-level marketing , and tourism. Utah has been one of

2556-585: Is the only state where every county contains some national forest. Utah features a dry, semi-arid to desert climate , although its many mountains feature a large variety of climates, with the highest points in the Uinta Mountains being above the timberline . The dry weather is a result of the state's location in the rain shadow of the Sierra Nevada in California. The eastern half of

2698-467: Is the variety of its terrain . Running down the middle of the state's northern third is the Wasatch Range , which rises to heights of almost 12,000 ft (3,700 m) above sea level. Utah is home to world-renowned ski resorts made popular by light, fluffy snow and winter storms that regularly dump up to three feet of it overnight. In the state's northeastern section, running east to west, are

2840-481: The 30th most populous , and the 11th least densely populated . Urban development is mostly concentrated in two regions: the Wasatch Front in the north-central part of the state, which includes the state capital, Salt Lake City , and is home to roughly two-thirds of the population; and Washington County in the southwest, which has somewhat more than 180,000 residents. Most of the western half of Utah lies in

2982-553: The Basin and Range Province have produced alkali basalts . Mixing between crustal melts and primitive magmas may explain this tendency, while the presence of tholeiite may indicate the occurrence of rifting processes in western Utah. Annual precipitation is about 760 millimetres (30 in) per year and mostly occurs in the form of snow from the Pacific Ocean , although summer monsoon precipitation also occurs. Most of

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3124-595: The Domínguez–Escalante expedition —left Santa Fe in 1776, hoping to find a route to the coast of California. The expedition traveled as far north as Utah Lake and encountered the native residents. The Spanish made further explorations in the region but were not interested in colonizing the area because of its desert nature. In 1821, the year Mexico achieved its independence from Spain, the region became known as part of its territory of Alta California . European trappers and fur traders explored some areas of Utah in

3266-631: The Great Basin . Utah has been inhabited for thousands of years by various indigenous groups , such as the ancient Puebloans , the Navajo, and the Ute. The first Europeans to arrive - in the mid-16th century - were the Spanish. Because of the region's challenging geography and harsh climate, it only became a peripheral part of New Spain (and later of Mexico). Even while it was Mexican territory, many of

3408-459: The I-15 corridor, including the densely populated Wasatch Front , receives approximately 15 inches (381 mm). The Great Salt Lake Desert is the driest area of the state, with less than 5 inches (127 mm). Snowfall is common in all but the far southern valleys. Although St. George receives only about 3 inches (76 mm) per year, Salt Lake City sees about 60 inches (1,524 mm), enhanced by

3550-713: The Mancos Shale of western North America. These shales are an important source rock for oil and gas , for example in the subsurface of the North Sea. In northwestern Europe, chalk deposits from the Upper Cretaceous are characteristic for the Chalk Group , which forms the white cliffs of Dover on the south coast of England and similar cliffs on the French Normandian coast. The group

3692-599: The Mountain Meadow Massacre —also came out in 1877. The corroborative testimonies coming out of Utah from Mormons and former Mormons influenced Congress and the people of the United States. In the 1890 Manifesto , the LDS Church banned polygamy. When Utah applied for statehood again , it was accepted. One of the conditions for granting Utah statehood was that a ban on polygamy be written into

3834-602: The Mountain Meadows massacre . Before troops led by Albert Sidney Johnston entered the territory, Brigham Young ordered all residents of Salt Lake City to evacuate southward to Utah Valley and sent out the Nauvoo Legion to delay the government's advance. Although wagons and supplies were burned, eventually the troops arrived in 1858, and Young surrendered official control to Cumming, although most subsequent commentators claim that Young retained true power in

3976-711: The North American Cordillera , as the Nevadan orogeny was followed by the Sevier and Laramide orogenies . Gondwana had begun to break up during the Jurassic Period, but its fragmentation accelerated during the Cretaceous and was largely complete by the end of the period. South America , Antarctica , and Australia rifted away from Africa (though India and Madagascar remained attached to each other until around 80 million years ago); thus,

4118-591: The Rocky Mountains , the Great Basin , and the Colorado Plateau . Utah covers an area of 84,899 sq mi (219,890 km ). It is one of the Four Corners states and is bordered by Idaho in the north, Wyoming in the north and east, Colorado in the east, at a single point by New Mexico to the southeast, by Arizona in the south, and by Nevada in the west. Only three U.S. states (Utah, Colorado, and Wyoming) have exclusively latitude and longitude lines as boundaries. One of Utah's defining characteristics

4260-600: The Salt Lake Valley on July 24, 1847. Over the next 22 years, more than 70,000 pioneers crossed the plains and settled in Utah. For the first few years, Brigham Young and the thousands of early settlers of Salt Lake City struggled to survive. The arid desert land was deemed desirable by the Mormons as a place where they could practice their religion without harassment. Settlers buried thirty-six Native Americans in one grave after an outbreak of measles occurred during

4402-553: The Selli Event . Early Aptian tropical sea surface temperatures (SSTs) were 27–32 °C, based on TEX 86 measurements from the equatorial Pacific. During the Aptian, Milankovitch cycles governed the occurrence of anoxic events by modulating the intensity of the hydrological cycle and terrestrial runoff. The early Aptian was also notable for its millennial scale hyperarid events in the mid-latitudes of Asia. The BAWI itself

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4544-728: The Turonian Age, based on isotopic evidence. However, this has subsequently been suggested to be the result of inconsistent isotopic proxies, with evidence of polar rainforests during this time interval at 82° S. Rafting by ice of stones into marine environments occurred during much of the Cretaceous, but evidence of deposition directly from glaciers is limited to the Early Cretaceous of the Eromanga Basin in southern Australia . Flowering plants (angiosperms) make up around 90% of living plant species today. Prior to

4686-742: The U.S. government intensified due to the practice of plural marriage , or polygamy , among members of the LDS Church. The Mormons were still pushing for the establishment of a State of Deseret with the new borders of the Utah Territory. Most, if not all, of the members of the U.S. government opposed the polygamous practices of the Mormons. Members of the LDS Church were viewed as un-American and rebellious when news of their polygamous practices spread. In 1857, particularly heinous accusations of abdication of government and general immorality were leveled by former associate justice William W. Drummond, among others. The detailed reports of life in Utah caused

4828-550: The Uinta Mountains , which rise to heights of over 13,000 feet (4,000 m). The highest point in the state, Kings Peak , at 13,528 feet (4,123 m), lies within the Uinta Mountains. At the western base of the Wasatch Range is the Wasatch Front , a series of valleys and basins that are home to the most populous parts of the state. It stretches approximately from Brigham City at the north end to Nephi at

4970-447: The basement underneath the volcanoes is formed by various Cretaceous to Miocene sedimentary or volcanic rocks. Volcanism in the region has been ongoing for the last 5 million years. The volcanism is considered to be intraplate and unrelated to either mantle plumes or subduction . Together with other Quaternary volcanic fields in Utah it is sometimes considered part of a wider South Utah volcanic field. Volcanic rocks erupted on

5112-616: The death of Joseph Smith in 1844, Brigham Young , as president of the Quorum of the Twelve , became the leader of the LDS Church in Nauvoo, Illinois . To address the growing conflicts between his people and their neighbors, Young agreed with Illinois Governor Thomas Ford in October 1845 that the Mormons would leave by the following year. Young and the first group of Mormon pioneers reached

5254-568: The lake-effect snow from the Great Salt Lake, which increases snowfall totals to the south, southeast, and east of the lake. Cretaceous The Cretaceous ( IPA : / k r ɪ ˈ t eɪ ʃ ə s / krih- TAY -shəss ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era , as well as the longest. At around 79   million years, it

5396-501: The least income inequality of any U.S. state. Over time and influenced by climate change , droughts in Utah have been increasing in frequency and severity, putting a further strain on Utah's water security and impacting the state's economy. The name Utah derives from the name of the Ute tribe , meaning 'people of the mountains'. However, no such word exists in the Utes' language, and

5538-483: The tuatara ) disappeared from North America and Europe after the Early Cretaceous , and were absent from North Africa and northern South America by the early Late Cretaceous . The cause of the decline of Rhynchocephalia remains unclear, but has often been suggested to be due to competition with advanced lizards and mammals. They appear to have remained diverse in high-latitude southern South America during

5680-948: The Albian regularly expanded northward in tandem with expansions of subtropical high pressure belts. The Cedar Mountain Formation's Soap Wash flora indicates a mean annual temperature of between 19 and 26 °C in Utah at the Albian-Cenomanian boundary. Tropical SSTs during the Cenomanian-Turonian Thermal Maximum were at least 30 °C, though one study estimated them as high as between 33 and 42 °C. An intermediate estimate of ~33-34 °C has also been given. Meanwhile, deep ocean temperatures were as much as 15 to 20 °C (27 to 36 °F) warmer than today's; one study estimated that deep ocean temperatures were between 12 and 20 °C during

5822-486: The Cenomanian between the Albian and Turonian. The Cretaceous is divided into Early and Late Cretaceous epochs , or Lower and Upper Cretaceous series . In older literature, the Cretaceous is sometimes divided into three series: Neocomian (lower/early), Gallic (middle) and Senonian (upper/late). A subdivision into 12 stages , all originating from European stratigraphy, is now used worldwide. In many parts of

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5964-571: The Cenozoic Era   —   the ichthyosaurs , last remaining temnospondyls ( Koolasuchus ), and nonmammalian cynodonts ( Tritylodontidae )   —   were already extinct millions of years before the event occurred. Coccolithophorids and molluscs , including ammonites , rudists , freshwater snails , and mussels , as well as organisms whose food chain included these shell builders, became extinct or suffered heavy losses. For example, ammonites are thought to have been

6106-645: The Coniacian through the Maastrichtian. During the Cretaceous, the late- Paleozoic -to-early-Mesozoic supercontinent of Pangaea completed its tectonic breakup into the present-day continents , although their positions were substantially different at the time. As the Atlantic Ocean widened, the convergent-margin mountain building ( orogenies ) that had begun during the Jurassic continued in

6248-626: The Cretaceous is sharply defined, being placed at an iridium -rich layer found worldwide that is believed to be associated with the Chicxulub impact crater , with its boundaries circumscribing parts of the Yucatán Peninsula and extending into the Gulf of Mexico . This layer has been dated at 66.043 Mya. At the end of the Cretaceous, the impact of a large body with the Earth may have been

6390-570: The Cretaceous is usually a marine system consisting of competent limestone beds or incompetent marls . Because the Alpine mountain chains did not yet exist in the Cretaceous, these deposits formed on the southern edge of the European continental shelf , at the margin of the Tethys Ocean . During the Cretaceous, the present North American continent was isolated from the other continents. In

6532-537: The Cretaceous seas. Stagnation of deep sea currents in middle Cretaceous times caused anoxic conditions in the sea water leaving the deposited organic matter undecomposed. Half of the world's petroleum reserves were laid down at this time in the anoxic conditions of what would become the Persian Gulf and the Gulf of Mexico. In many places around the world, dark anoxic shales were formed during this interval, such as

6674-672: The Jurassic, the North Atlantic already opened, leaving a proto-ocean between Europe and North America. From north to south across the continent, the Western Interior Seaway started forming. This inland sea separated the elevated areas of Laramidia in the west and Appalachia in the east. Three dinosaur clades found in Laramidia (troodontids, therizinosaurids and oviraptorosaurs) are absent from Appalachia from

6816-666: The LDS Church's first three temples in Utah, each started after but finished many years before the larger and better-known temple built in Salt Lake City was completed in 1893), as well as Parowan, Cedar City, Bluff, Moab, Vernal, Fillmore (which served as the territorial capital between 1850 and 1856), Nephi, Levan, Spanish Fork, Springville, Provo Bench (now Orem ), Pleasant Grove, American Fork, Lehi, Sandy, Murray, Jordan, Centerville, Farmington, Huntsville, Kaysville, Grantsville, Tooele, Roy, Brigham City, and many other smaller towns and settlements. Young had an expansionist view of

6958-415: The LKEPCI. During this period of relatively cool temperatures, the ITCZ became narrower, while the strength of both summer and winter monsoons in East Asia was directly correlated to atmospheric CO 2 concentrations. Laramidia likewise had a seasonal, monsoonal climate. The Maastrichtian was a time of chaotic, highly variable climate. Two upticks in global temperatures are known to have occurred during

7100-416: The Late Cretaceous, where lizards remained rare, with their remains outnumbering terrestrial lizards 200:1. Choristoderes , a group of freshwater aquatic reptiles that first appeared during the preceding Jurassic, underwent a major evolutionary radiation in Asia during the Early Cretaceous, which represents the high point of choristoderan diversity, including long necked forms such as Hyphalosaurus and

7242-399: The Late Cretaceous-Early Palaeogene Cool Interval (LKEPCI). Tropical SSTs declined from around 35 °C in the early Campanian to around 28 °C in the Maastrichtian. Deep ocean temperatures declined to 9 to 12 °C, though the shallow temperature gradient between tropical and polar seas remained. Regional conditions in the Western Interior Seaway changed little between the MKH and

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7384-486: The MKH. Mean annual temperatures at the poles during the MKH exceeded 14 °C. Such hot temperatures during the MKH resulted in a very gentle temperature gradient from the equator to the poles; the latitudinal temperature gradient during the Cenomanian-Turonian Thermal Maximum was 0.54 °C per ° latitude for the Southern Hemisphere and 0.49 °C per ° latitude for the Northern Hemisphere, in contrast to present day values of 1.07 and 0.69 °C per ° latitude for

7526-412: The MKH. The poles were so warm that ectothermic reptiles were able to inhabit them. Beginning in the Santonian, near the end of the MKH, the global climate began to cool, with this cooling trend continuing across the Campanian. This period of cooling, driven by falling levels of atmospheric carbon dioxide, caused the end of the MKH and the transition into a cooler climatic interval, known formally as

7668-404: The Maastrichtian, bucking the trend of overall cooler temperatures during the LKEPCI. Between 70 and 69 Ma and 66–65 Ma, isotopic ratios indicate elevated atmospheric CO 2 pressures with levels of 1000–1400 ppmV and mean annual temperatures in west Texas between 21 and 23 °C (70 and 73 °F). Atmospheric CO 2 and temperature relations indicate a doubling of pCO 2 was accompanied by

7810-466: The Markagunt Plateau range from alkali basalt over basalt and basaltic andesite to andesite and latite , and define calc-alkaline and tholeiitic suites which appear to become more silicic over time. Phenocrysts include clinopyroxene , olivine and plagioclase , with not all minerals present in all flows. Volcanic rocks at Markagunt Plateau are unusual for the common occurrence of subalkaline volcanics; most other recent volcanic centres in

7952-444: The Markagunt Plateau, the 3.7 kilometres (12,000 ft) long Duck Creek Lava Tube is among the longest and highest lava tubes in the United States. Perennial ice and pools of water are widespread in the tubes, which are typically accessible through collapsed portions of the tubes. Lava flows almost reach Panguitch Lake . Lava flows have blocked surface drainages, forming Navajo Lake which drains underground into two watersheds and

8094-440: The Markagunt volcanic field occurred in three stages. The first stage saw activity mainly at the margins of the Markagunt Plateau between 5.3 and 2.8 million years ago; the cinder cones and lava flows produced during this stage are heavily eroded. The second stage occurred along the Sevier fault and in the southern part of the field between 800,000 and 500,000 years ago; its cones and lava flows are moderately eroded. The third group

8236-428: The Mesozoic) ended with the Cretaceous–Paleogene extinction event , a large mass extinction in which many groups, including non-avian dinosaurs, pterosaurs , and large marine reptiles , died out, widely thought to have been caused by the impact of a large asteroid that formed the Chicxulub crater in the Gulf of Mexico. The end of the Cretaceous is defined by the abrupt Cretaceous–Paleogene boundary (K–Pg boundary),

8378-609: The Olympic venues built along the Wasatch Front continue to be used for sporting events. Preparation for the Olympics spurred the development of the light-rail system in the Salt Lake Valley , known as TRAX , and the reconstruction of the freeway system around the city. In 1957, Utah created the Utah State Parks Commission with four parks. Today, Utah State Parks manages 43 parks and several undeveloped areas totaling over 95,000 acres (380 km ) of land and more than 1,000,000 acres (4,000 km ) of water. Utah's state parks are scattered throughout Utah, from Bear Lake State Park at

8520-410: The Pacific Ocean; he subsequently learned this body of water was a giant salt lake . After the discovery of the lake, hundreds of American and Canadian traders and trappers established trading posts in the region. In the 1830s, thousands of migrants traveling from the Eastern United States to the American West began to make stops in the region of the Great Salt Lake, then known as Lake Youta. Following

8662-525: The Pink Cliffs and to the west by the cliffs of Cedar Breaks National Monument , and features lava flows and over 25 cinder cones mostly between Panguitch Lake and Navajo Lake although older volcanics occur south of Panguitch . Some cones such as Hancock Peak, Henrie Knolls and Strawberry Knolls are up to 150 metres (500 ft) high, and Miller Knoll cone is surrounded by three satellite vents. Past glaciation has eroded some vents. Some recent vents formed along lineaments and faults ; this includes

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8804-419: The South Atlantic and Indian Oceans were newly formed. Such active rifting lifted great undersea mountain chains along the welts, raising eustatic sea levels worldwide. To the north of Africa the Tethys Sea continued to narrow. During most of the Late Cretaceous, North America would be divided in two by the Western Interior Seaway , a large interior sea, separating Laramidia to the west and Appalachia to

8946-514: The Southern and Northern hemispheres, respectively. This meant weaker global winds, which drive the ocean currents, and resulted in less upwelling and more stagnant oceans than today. This is evidenced by widespread black shale deposition and frequent anoxic events . Tropical SSTs during the late Albian most likely averaged around 30 °C. Despite this high SST, seawater was not hypersaline at this time, as this would have required significantly higher temperatures still. On land, arid zones in

9088-403: The Tethys to the Arctic Ocean and enabling biotic exchange between the two oceans. At the peak of the Cretaceous transgression , one-third of Earth's present land area was submerged. The Cretaceous is justly famous for its chalk ; indeed, more chalk formed in the Cretaceous than in any other period in the Phanerozoic . Mid-ocean ridge activity—or rather, the circulation of seawater through

9230-463: The United States had taken control of New Mexico and California. The entire Southwest became U.S. territory upon the signing of the Treaty of Guadalupe Hidalgo , February 2, 1848. The treaty was ratified by the United States Senate on March 11. Learning that California and New Mexico were applying for statehood, the settlers of the Utah area (originally having planned to petition for territorial status) applied for statehood with an ambitious plan for

9372-413: The Utah region’s earliest European settlers were from the United States; notable among these were Mormons who were fleeing marginalization and persecution in the United States and arrived via the so-called Mormon Trail . In 1848, after the Mexican–American War , the region was annexed by the U.S. , becoming part of the Utah Territory , which included what later became Colorado and Nevada. Disputes between

9514-423: The Utah/Idaho border to Edge of the Cedars State Park Museum deep in the Four Corners region and everywhere in between. Utah State Parks is also home to the state's off highway vehicle office, state boating office, and the trails program. During the late 20th century, the state grew quickly. In the 1970s growth was phenomenal in the suburbs of the Wasatch Front. Sandy was one of the fastest-growing cities in

9656-412: The Utes refer to themselves as Noochee . The meaning of Utes as 'the mountain people' has been attributed to the neighboring Pueblo Indians , as well as to the Apache word Yuttahih , which means 'one that is higher up' or 'those that are higher up'. In Spanish , it was pronounced Yuta ; subsequently, English-speaking people may have adapted the word as Utah . Thousands of years before

9798-521: The administration of James Buchanan to send a secret military "expedition" to Utah. When the supposed rebellion should be quelled, Alfred Cumming would take the place of Brigham Young as territorial governor. The resulting conflict is known as the Utah War , nicknamed "Buchanan's Blunder" by the Mormon leaders. In September 1857, about 120 American settlers of the Baker–Fancher wagon train, en route to California from Arkansas, were murdered by Utah Territorial Militia and some Paiute Native Americans in

9940-425: The ancestors of modern-day birds also diversified. They inhabited every continent, and were even found in cold polar latitudes. Pterosaurs were common in the early and middle Cretaceous, but as the Cretaceous proceeded they declined for poorly understood reasons (once thought to be due to competition with early birds , but now it is understood avian adaptive radiation is not consistent with pterosaur decline ). By

10082-537: The area, beavers built beaver dams on watercourses and peat accumulated at several sites. During the Pleistocene , the Bull Lake glaciation and the Pinedale glaciation took place on the Markagunt Plateau and eroded and buried some lava flows. Large volcanic eruptions in the 1980s such as Mount St. Helens raised public awareness about the dangers emanating from volcanic activity. While most fatalities during volcanic eruptions occurred at silicic volcanoes, basaltic eruptions like these that occurred in Utah in

10224-707: The arrival of Europeans, the Ancestral Puebloans and the Fremont people lived in what is now known as Utah, some of which spoke languages of the Uto-Aztecan group. Ancestral Pueblo peoples built their homes through excavations in mountains, and the Fremont people built houses of straw before disappearing from the region around the 15th century. Another group of Native Americans, the Navajo , settled in

10366-613: The chain of over 19 cinder cones that generated the Henrie Knolls flows. Lava flows in the Markagunt Plateau are blocky and have flow fronts which reach heights of 30–60 metres (98–197 ft); many were erupted from fissure vents . Some of the lava flows of Markagunt Plateau are among the youngest in Utah; these are sparsely vegetated and blocky, while others are cut by streams and stream terraces . Bowers Cave and Mammoth Cave are lava tubes set in lava flows on

10508-408: The continental crust were covered with shallow seas. The Tethys Sea connecting the tropical oceans east to west also helped to warm the global climate. Warm-adapted plant fossils are known from localities as far north as Alaska and Greenland , while dinosaur fossils have been found within 15 degrees of the Cretaceous south pole . It was suggested that there was Antarctic marine glaciation in

10650-401: The country at that time. Today, many areas of Utah continue to see boom-time growth. Northern Davis , southern and western Salt Lake , Summit , eastern Tooele , Utah , Wasatch , and Washington counties are all growing very quickly. Management of transportation and urbanization are major issues in politics, as development consumes agricultural land and wilderness areas and transportation is

10792-482: The dominant Mormon community and the federal government delayed Utah's admission as a state: in 1896, after it agreed to outlaw polygamy, it was admitted as the 45th state . People from Utah are known as Utahns. Slightly over half of all Utahns are Mormons , the vast majority of whom are members of the Church of Jesus Christ of Latter-day Saints (LDS Church), which has its world headquarters in Salt Lake City; Utah

10934-463: The earliest crown group birds. Acanthomorph fish, the most diverse group of modern vertebrates, appeared in aquatic habitats around the middle of the Cretaceous. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth by the end of the Cretaceous, coincident with the decline and extinction of previously widespread gymnosperm groups. The Cretaceous (along with

11076-572: The early 19th century from Canada and the United States. The city of Provo, Utah , was named for one Étienne Provost , who visited the area in 1825. The city of Ogden, Utah , was named after Peter Skene Ogden , a Canadian explorer who traded furs in the Weber Valley. In late 1824, Jim Bridger became the first known English-speaking person to sight the Great Salt Lake . Due to the high salinity of its waters, he thought he had found

11218-609: The early and mid-Cretaceous (becoming extinct during the late Cretaceous Cenomanian-Turonian anoxic event ), plesiosaurs throughout the entire period, and mosasaurs appearing in the Late Cretaceous. Sea turtles in the form of Cheloniidae and Panchelonioidea lived during the period and survived the extinction event. Panchelonioidea is today represented by a single species; the leatherback sea turtle . The Hesperornithiformes were flightless, marine diving birds that swam like grebes . Baculites , an ammonite genus with

11360-554: The east, then receded late in the period, leaving thick marine deposits sandwiched between coal beds. Bivalve palaeobiogeography also indicates that Africa was split in half by a shallow sea during the Coniacian and Santonian, connecting the Tethys with the South Atlantic by way of the central Sahara and Central Africa, which were then underwater. Yet another shallow seaway ran between what is now Norway and Greenland, connecting

11502-529: The eastern Great Basin. West of the Great Salt Lake , stretching to the Nevada border, lies the arid Great Salt Lake Desert . One exception to this aridity is Snake Valley , which is (relatively) lush due to large springs and wetlands fed from groundwater derived from snow melt in the Snake Range , Deep Creek Range , and other tall mountains to the west of Snake Valley. Great Basin National Park

11644-747: The end of the AACS, which ended around 111 Ma with the Paquier/Urbino Thermal Maximum, giving way to the Mid-Cretaceous Hothouse (MKH), which lasted from the early Albian until the early Campanian. Faster rates of seafloor spreading and entry of carbon dioxide into the atmosphere are believed to have initiated this period of extreme warmth, along with high flood basalt activity. The MKH was punctuated by multiple thermal maxima of extreme warmth. The Leenhardt Thermal Event (LTE) occurred around 110 Ma, followed shortly by

11786-501: The end of the Cretaceous. The high sea level and warm climate of the Cretaceous meant large areas of the continents were covered by warm, shallow seas, providing habitat for many marine organisms. The Cretaceous was named for the extensive chalk deposits of this age in Europe, but in many parts of the world, the deposits from the Cretaceous are of marine limestone , a rock type that is formed under warm, shallow marine conditions. Due to

11928-463: The end of the period only three highly specialized families remained; Pteranodontidae , Nyctosauridae , and Azhdarchidae . The Liaoning lagerstätte ( Yixian Formation ) in China is an important site, full of preserved remains of numerous types of small dinosaurs, birds and mammals, that provides a glimpse of life in the Early Cretaceous. The coelurosaur dinosaurs found there represent types of

12070-407: The enlarged ridges—enriched the oceans in calcium ; this made the oceans more saturated, as well as increased the bioavailability of the element for calcareous nanoplankton . These widespread carbonates and other sedimentary deposits make the Cretaceous rock record especially fine. Famous formations from North America include the rich marine fossils of Kansas 's Smoky Hill Chalk Member and

12212-528: The extinction fed on insects , larvae , worms , and snails, which in turn fed on dead plant and animal matter. Scientists theorise that these organisms survived the collapse of plant-based food chains because they fed on detritus . In stream communities , few groups of animals became extinct. Stream communities rely less on food from living plants and more on detritus that washes in from land. This particular ecological niche buffered them from extinction. Similar, but more complex patterns have been found in

12354-400: The fastest growing states since 2000, with the 2020 U.S. census confirming the fastest population growth in the nation since 2010. St. George was the fastest-growing metropolitan area in the United States from 2000 to 2005. Utah ranks among the overall best states in metrics such as healthcare , governance, education, and infrastructure. It has the 12th-highest median average income and

12496-558: The first records of the gharial-like Neochoristodera , which appear to have evolved in the regional absence of aquatic neosuchian crocodyliformes. During the Late Cretaceous the neochoristodere Champsosaurus was widely distributed across western North America. Due to the extreme climatic warmth in the Arctic, choristoderans were able to colonise it too during the Late Cretaceous. In the seas, rays , modern sharks and teleosts became common. Marine reptiles included ichthyosaurs in

12638-503: The genus Berriasella , but its use as a stratigraphic indicator has been questioned, as its first appearance does not correlate with that of C. alpina . The boundary is officially considered by the International Commission on Stratigraphy to be approximately 145 million years ago, but other estimates have been proposed based on U-Pb geochronology, ranging as young as 140 million years ago. The upper boundary of

12780-625: The group Maniraptora , which includes modern birds and their closest non-avian relatives, such as dromaeosaurs , oviraptorosaurs , therizinosaurs , troodontids along with other avialans . Fossils of these dinosaurs from the Liaoning lagerstätte are notable for the presence of hair-like feathers . Insects diversified during the Cretaceous, and the oldest known ants , termites and some lepidopterans , akin to butterflies and moths , appeared. Aphids , grasshoppers and gall wasps appeared. Rhynchocephalians (which today only includes

12922-559: The happiness of the very early Church members before polygamy. They independently published their books in 1875. These books and the lectures of Ann Eliza Young have been credited with the United States Congress's passage of anti-polygamy laws by newspapers throughout the United States, as recorded in "The Ann Eliza Young Vindicator", a pamphlet which detailed Ms. Young's travels and warm reception throughout her lecture tour. T. B. H. Stenhouse, former Utah Mormon polygamist,

13064-412: The high sea level, there was extensive space for such sedimentation . Because of the relatively young age and great thickness of the system, Cretaceous rocks are evident in many areas worldwide. Chalk is a rock type characteristic for (but not restricted to) the Cretaceous. It consists of coccoliths , microscopically small calcite skeletons of coccolithophores , a type of algae that prospered in

13206-551: The highest rates of extinction and turnover. Thylacocephala , a class of crustaceans, went extinct in the Late Cretaceous. The first radiation of the diatoms (generally siliceous shelled, rather than calcareous ) in the oceans occurred during the Cretaceous; freshwater diatoms did not appear until the Miocene . Calcareous nannoplankton were important components of the marine microbiota and important as biostratigraphic markers and recorders of environmental change. The Cretaceous

13348-714: The last epoch of the Jurassic, the Tithonian, continued into the Berriasian, the first age of the Cretaceous. The North Atlantic seaway opened and enabled the flow of cool water from the Boreal Ocean into the Tethys. There is evidence that snowfalls were common in the higher latitudes during this age, and the tropics became wetter than during the Triassic and Jurassic. Glaciation was restricted to high- latitude mountains, though seasonal snow may have existed farther from

13490-575: The late Valanginian (~ 134 million years ago) found in Israel and Italy, initially at low abundance. Molecular clock estimates conflict with fossil estimates, suggesting the diversification of crown-group angiosperms during the Late Triassic or the Jurassic, but such estimates are difficult to reconcile with the heavily sampled pollen record and the distinctive tricolpate to tricolporoidate (triple grooved) pollen of eudicot angiosperms. Among

13632-465: The late Cretaceous, and all else that depended on them suffered, as well. Herbivorous animals, which depended on plants and plankton as their food, died out as their food sources became scarce; consequently, the top predators , such as Tyrannosaurus rex , also perished. Yet only three major groups of tetrapods disappeared completely; the nonavian dinosaurs , the plesiosaurs and the pterosaurs . The other Cretaceous groups that did not survive into

13774-574: The latest Albian. Approximately 94 Ma, the Cenomanian-Turonian Thermal Maximum occurred, with this hyperthermal being the most extreme hothouse interval of the Cretaceous and being associated with a sea level highstand. Temperatures cooled down slightly over the next few million years, but then another thermal maximum, the Coniacian Thermal Maximum, happened, with this thermal event being dated to around 87 Ma. Atmospheric CO 2 levels may have varied by thousands of ppm throughout

13916-711: The l’Arboudeyesse Thermal Event (ATE) a million years later. Following these two hyperthermals was the Amadeus Thermal Maximum around 106 Ma, during the middle Albian. Then, around a million years after that, occurred the Petite Verol Thermal Event (PVTE). Afterwards, around 102.5 Ma, the Event 6 Thermal Event (EV6) took place; this event was itself followed by the Breistroffer Thermal Maximum around 101 Ma, during

14058-579: The majority of eastern Utah's population lives. Economies are dominated by mining, oil shale , oil , and natural gas-drilling, ranching , and recreation . Much of eastern Utah is part of the Uintah and Ouray Indian Reservation . The most popular destination within northeastern Utah is Dinosaur National Monument near Vernal . Southwestern Utah is the lowest and hottest spot in Utah. It is known as Utah's Dixie because early settlers were able to grow some cotton there. Beaverdam Wash in far southwestern Utah

14200-517: The middle Cretaceous, becoming the dominant group of land plants by the end of the period, coincident with the decline of previously dominant groups such as conifers. The oldest known fossils of grasses are from the Albian , with the family having diversified into modern groups by the end of the Cretaceous. The oldest large angiosperm trees are known from the Turonian (c. 90 Mya) of New Jersey, with

14342-642: The middle member and of 34,000 ± 4,000 and 32,000 ± 3,000 for two other flows which are likely of the same age. The middle member is overlaid by the Dry Valley flow which is also younger than the other two flows. The precise date of the last eruption is not known but eight cinder cones in the volcanic field appear to be less than 10,000 years old. The Southern Paiute settled into the region after 1,100 AD and their legends may contain references to lava flows . Aside from volcanism, landsliding , aeolian , alluvial fan and floodplain sedimentation took place in

14484-470: The most promising candidates for fixing the Jurassic–Cretaceous boundary. In particular, the first appearance Calpionella alpina , coinciding with the base of the eponymous Alpina subzone, has been proposed as the definition of the base of the Cretaceous. The working definition for the boundary has often been placed as the first appearance of the ammonite Strambergella jacobi , formerly placed in

14626-824: The oceans. Extinction was more severe among animals living in the water column than among animals living on or in the seafloor. Animals in the water column are almost entirely dependent on primary production from living phytoplankton, while animals living on or in the ocean floor feed on detritus or can switch to detritus feeding. The largest air-breathing survivors of the event, crocodilians and champsosaurs , were semiaquatic and had access to detritus. Modern crocodilians can live as scavengers and can survive for months without food and go into hibernation when conditions are unfavorable, and their young are small, grow slowly, and feed largely on invertebrates and dead organisms or fragments of organisms for their first few years. These characteristics have been linked to crocodilian survival at

14768-601: The oldest records of Angiosperm macrofossils are Montsechia from the Barremian aged Las Hoyas beds of Spain and Archaefructus from the Barremian-Aptian boundary Yixian Formation in China. Tricolpate pollen distinctive of eudicots first appears in the Late Barremian, while the earliest remains of monocots are known from the Aptian. Flowering plants underwent a rapid radiation beginning during

14910-521: The past are also potential sources of danger. The Markagunt Plateau is considered to be a low-risk volcano. Renewed activity may impact the reservoir and popular recreation site of Navajo Lake less than 8 kilometres (5.0 mi) south of the Markagunt Plateau volcanic field as well as Utah State Route 14 and U.S. Route 89 which are constructed across lava flows from the volcanic field. Utah Utah ( / ˈ juː t ɑː / YOO -tah , / ˈ juː t ɔː / YOO -taw )

15052-417: The plateau is part of Dixie National Forest ; trees include aspen , spruce and fir with an understory consisting of juniper , Mertensia arizonica and mountain gooseberry and the vegetation covers most surfaces except for the younger volcanoes and canyon walls. Additionally, in marshes vegetation includes hydrophilic plants such as cattails , while juniper grows on lava flows . Midway Valley

15194-523: The poles. After the end of the first age, however, temperatures began to increase again, with a number of thermal excursions, such as the middle Valanginian Weissert Thermal Excursion (WTX), which was caused by the Paraná-Etendeka Large Igneous Province's activity. It was followed by the middle Hauterivian Faraoni Thermal Excursion (FTX) and the early Barremian Hauptblatterton Thermal Event (HTE). The HTE marked

15336-550: The popular mid-century western film genre. From such films, most US residents recognize such natural landmarks as Delicate Arch and "the Mittens" of Monument Valley . During the 1950s, 1960s, and 1970s, with the construction of the Interstate highway system, accessibility to the southern scenic areas was made easier. Since the establishment of Alta Ski Area in 1939 and the subsequent development of several ski resorts in

15478-412: The principal food of mosasaurs , a group of giant marine lizards related to snakes that became extinct at the boundary. Omnivores , insectivores , and carrion -eaters survived the extinction event, perhaps because of the increased availability of their food sources. At the end of the Cretaceous, there seem to have been no purely herbivorous or carnivorous mammals . Mammals and birds that survived

15620-547: The punctuation mark at the end of a progressive decline in biodiversity during the Maastrichtian age. The result was the extinction of three-quarters of Earth's plant and animal species. The impact created the sharp break known as the K–Pg boundary (formerly known as the K–T boundary). Earth's biodiversity required substantial time to recover from this event, despite the probable existence of an abundance of vacant ecological niches . Despite

15762-624: The region around the 18th century. In the mid-18th century, other Uto-Aztecan tribes, including the Goshute , the Paiute , the Shoshone , and the Ute people, also settled in the region. These five groups were present when the first European explorers arrived. The southern Utah region was explored by the Spanish in 1540, led by Francisco Vázquez de Coronado while looking for the legendary Cíbola . A group led by two Catholic priests—sometimes called

15904-583: The remainder of the 19th century, Mormon pioneers established hundreds of other settlements in Utah, Idaho , Nevada , Arizona , Wyoming , California , Canada , and Mexico —including in Las Vegas, Nevada ; Franklin, Idaho (the first European settlement in Idaho); San Bernardino, California ; Mesa, Arizona ; Star Valley, Wyoming ; and Carson Valley, Nevada . Prominent settlements in Utah included St. George , Logan , and Manti (where settlers completed

16046-744: The rise of angiosperms, during the Jurassic and the Early Cretaceous, the higher flora was dominated by gymnosperm groups, including cycads , conifers , ginkgophytes , gnetophytes and close relatives, as well as the extinct Bennettitales . Other groups of plants included pteridosperms or "seed ferns", a collective term that refers to disparate groups of extinct seed plants with fern-like foliage, including groups such as Corystospermaceae and Caytoniales . The exact origins of angiosperms are uncertain, although molecular evidence suggests that they are not closely related to any living group of gymnosperms. The earliest widely accepted evidence of flowering plants are monosulcate (single-grooved) pollen grains from

16188-470: The sandstone, creating some of the world's most striking and wild terrain (the area around the confluence of the Colorado and Green Rivers was the last to be mapped in the lower 48 United States). Wind and rain have also sculpted the soft sandstone over millions of years. Canyons, gullies, arches, pinnacles, buttes, bluffs, and mesas are common sights throughout south-central and southeast Utah. This terrain

16330-451: The severity of the K-Pg extinction event, there were significant variations in the rate of extinction between and within different clades . Species that depended on photosynthesis declined or became extinct as atmospheric particles blocked solar energy . As is the case today, photosynthesizing organisms, such as phytoplankton and land plants , formed the primary part of the food chain in

16472-539: The south end. Approximately 75 percent of the state's population lives in this corridor, and population growth is rapid. Western Utah is a mostly arid desert with a basin and range topography. Small mountain ranges and rugged terrain punctuate the landscape. The Bonneville Salt Flats are an exception, being comparatively flat as a result of once forming the bed of ancient Lake Bonneville . Great Salt Lake, Utah Lake , Sevier Lake , and Rush Lake are all remnants of this ancient freshwater lake, which once covered most of

16614-433: The spine of Utah. Just north of Dixie and east of Cedar City is the state's highest ski resort, Brian Head . Like most of the western and southwestern states, the federal government owns much of the land in Utah. Over 70 percent of the land is either BLM land , Utah State Trustland, or U.S. National Forest , U.S. National Park , U.S. National Monument , National Recreation Area or U.S. Wilderness Area . Utah

16756-488: The state constitution. This was a condition required of other western states that were admitted into the Union later. Statehood was officially granted on January 4, 1896. Beginning in the early 20th century, with the establishment of such national parks as Bryce Canyon National Park and Zion National Park , Utah became known for its natural beauty. Southern Utah became a popular filming spot for arid, rugged scenes featured in

16898-585: The state lies in the rain shadow of the Wasatch Mountains . The primary source of precipitation for the state is the Pacific Ocean, with the state usually lying in the path of large Pacific storms from October to May. In summer, the state, especially southern and eastern Utah, lies in the path of monsoon moisture from the Gulf of California . Most of the lowland areas receive less than 12 inches (305 mm) of precipitation annually, although

17040-464: The state's mountains, Utah's skiing has become world-renowned. The dry, powdery snow of the Wasatch Range is considered some of the best skiing in the world (the state license plate once claimed "the Greatest Snow on Earth"). Salt Lake City won the bid for the 2002 Winter Olympic Games , and this served as a great boost to the economy. The ski resorts have increased in popularity, and many of

17182-422: The strong regionality of most biostratigraphic markers, and the lack of any chemostratigraphic events, such as isotope excursions (large sudden changes in ratios of isotopes ) that could be used to define or correlate a boundary. Calpionellids , an enigmatic group of planktonic protists with urn-shaped calcitic tests briefly abundant during the latest Jurassic to earliest Cretaceous, have been suggested as

17324-633: The terrestrial fauna of the late Cretaceous Hell Creek Formation . Other important Cretaceous exposures occur in Europe (e.g., the Weald ) and China (the Yixian Formation ). In the area that is now India, massive lava beds called the Deccan Traps were erupted in the very late Cretaceous and early Paleocene. Palynological evidence indicates the Cretaceous climate had three broad phases:

17466-799: The territorial legislature passed the Act in Relation to Service and the Act for the relief of Indian Slaves and Prisoners formally legalizing slavery in the territory. Slavery was abolished in the territory during the Civil War. In 1850, Salt Lake City sent out a force known as the Nauvoo Legion and engaged the Timpanogos in the Battle at Fort Utah . Disputes between the Mormon inhabitants and

17608-491: The territory that he and the Mormon pioneers were settling, calling it Deseret—which according to the Book of Mormon was an ancient word for "honeybee". This is symbolized by the beehive on the Utah flag, and the state's motto, "Industry". The Utah Territory was much smaller than the proposed state of Deseret, but it still contained all of the present states of Nevada and Utah as well as pieces of modern Wyoming and Colorado . It

17750-519: The territory's history. Chief Antonga Black Hawk died in 1870, but fights continued to break out until additional federal troops were sent in to suppress the Ghost Dance of 1872. The war is unique among Indian Wars because it was a three-way conflict, with mounted Timpanogos Utes led by Antonga Black Hawk fighting federal and LDS authorities. On May 10, 1869, the First transcontinental railroad

17892-490: The territory. A steady stream of governors appointed by the president quit the position, often citing the traditions of their supposed territorial government. By agreement with Young, Johnston established Camp Floyd , 40 miles (60 km) away from Salt Lake City to the southwest. Salt Lake City was the last link of the First Transcontinental Telegraph , completed in October 1861. Brigham Young

18034-534: The tribe is part of the coalition that manages Bears Ears National Monument . Southeastern Utah is also punctuated by the remote, but lofty La Sal , Abajo , and Henry mountain ranges. Eastern (northern quarter) Utah is a high-elevation area covered mostly by plateaus and basins, particularly the Tavaputs Plateau and San Rafael Swell , which remain mostly inaccessible, and the Uinta Basin , where

18176-483: The trunk having a preserved diameter of 1.8 metres (5.9 ft) and an estimated height of 50 metres (160 ft). During the Cretaceous, ferns in the order Polypodiales , which make up 80% of living fern species, would also begin to diversify. On land, mammals were generally small sized, but a very relevant component of the fauna , with cimolodont multituberculates outnumbering dinosaurs in some sites. Neither true marsupials nor placentals existed until

18318-789: The ultimate end of the Tithonian-early Barremian Cool Interval (TEBCI). During this interval, precession was the dominant orbital driver of environmental changes in the Vocontian Basin. For much of the TEBCI, northern Gondwana experienced a monsoonal climate. A shallow thermocline existed in the mid-latitude Tethys. The TEBCI was followed by the Barremian-Aptian Warm Interval (BAWI). This hot climatic interval coincides with Manihiki and Ontong Java Plateau volcanism and with

18460-643: The upper Cretaceous of Western Europe . The name Cretaceous was derived from the Latin creta , meaning chalk . The twofold division of the Cretaceous was implemented by Conybeare and Phillips in 1822. Alcide d'Orbigny in 1840 divided the French Cretaceous into five étages (stages): the Neocomian , Aptian, Albian, Turonian, and Senonian, later adding the Urgonian between Neocomian and Aptian and

18602-628: The very end, but a variety of non-marsupial metatherians and non-placental eutherians had already begun to diversify greatly, ranging as carnivores ( Deltatheroida ), aquatic foragers ( Stagodontidae ) and herbivores ( Schowalteria , Zhelestidae ). Various "archaic" groups like eutriconodonts were common in the Early Cretaceous, but by the Late Cretaceous northern mammalian faunas were dominated by multituberculates and therians , with dryolestoids dominating South America . The apex predators were archosaurian reptiles , especially dinosaurs , which were at their most diverse stage. Avians such as

18744-483: The volcanic field. Many streams and ephemeral creeks head in springs or disappear into sinkholes. Geologically, southwestern Utah is at the margin between the geologic provinces known as the Colorado Plateau and the Basin and Range Province , the former of which features flat lying sediments while the latter is characterized by steep horsts and grabens . After the Oligocene and Miocene , during which volcanism

18886-468: The winter of 1847. The first group of settlers brought three African slaves with them, making Utah the only place in the western United States to have African slavery. The three slaves, Green Flake, Hark Lay, and Oscar Crosby, came west with the first group of settlers in 1847. Utah was a Mexican territory when the first pioneers arrived in 1847. Early in the Mexican–American War in late 1846,

19028-407: The world, alternative local subdivisions are still in use. From youngest to oldest, the subdivisions of the Cretaceous period are: The lower boundary of the Cretaceous is currently undefined, and the Jurassic–Cretaceous boundary is currently the only system boundary to lack a defined Global Boundary Stratotype Section and Point (GSSP). Placing a GSSP for this boundary has been difficult because of

19170-524: Was among the first to send a message, along with Abraham Lincoln and other officials. Because of the American Civil War , federal troops were pulled out of Utah Territory in 1861. This was a boon to the local economy as the army sold everything in camp for pennies on the dollar before marching back east to join the war. The territory was then left in LDS hands until Patrick E. Connor arrived with

19312-545: Was characterized by calderas and stratovolcanoes , beginning 8 million years ago smaller volumes of mostly mafic magma formed lava domes , shield volcanoes , volcanic cones and volcanic plugs . The Markagunt Plateau is part of the High Plateaus geologic province, in the Colorado Plateau and at its margins with the Basin and Range Province. It is a 60–80 kilometres (37–50 mi) wide fault -bounded block and

19454-597: Was completed at Promontory Summit , north of the Great Salt Lake. The railroad brought increasing numbers of people into the territory and several influential businesspeople made fortunes there. During the 1870s and 1880s laws were passed to punish polygamists due, in part, to stories from Utah. Notably, Ann Eliza Young —tenth wife to divorce Brigham Young, women's advocate, national lecturer, and author of Wife No.   19 or My Life of Bondage —and Fanny Stenhouse, author of Tell It All: My Life in Mormonism , testified to

19596-488: Was created with the Compromise of 1850 , and Fillmore , named after President Millard Fillmore , was designated the capital. The territory was given the name Utah after the Ute tribe of Native Americans. Salt Lake City replaced Fillmore as the territorial capital in 1856. By 1850, there were around 100 black people in the territory, the majority of whom were slaves. In Salt Lake County, 26 slaves were counted. In 1852,

19738-476: Was emplaced during the middle Pleistocene and Holocene . Some individual vents: The appearance and weathering characteristics of many volcanic structures imply that they have a recent age. Argon-argon dating has yielded an imprecise date of 58,000 ± 35,000 years ago for the Henrie Knolls lava flows. On the Miller Knoll flows, surface exposure dating has yielded ages of 38,000 - 36,000 years ago for

19880-654: Was followed by the Aptian-Albian Cold Snap (AACS) that began about 118 Ma. A short, relatively minor ice age may have occurred during this so-called "cold snap", as evidenced by glacial dropstones in the western parts of the Tethys Ocean and the expansion of calcareous nannofossils that dwelt in cold water into lower latitudes. The AACS is associated with an arid period in the Iberian Peninsula . Temperatures increased drastically after

20022-454: Was largely ice-free, although there is some evidence of brief periods of glaciation during the cooler first half, and forests extended to the poles. Many of the dominant taxonomic groups present in modern times can be ultimately traced back to origins in the Cretaceous. During this time, new groups of mammals and birds appeared, including the earliest relatives of placentals & marsupials ( Eutheria and Metatheria respectively), and

20164-477: Was later further dammed by humans; another lava-dammed lake downstream from Navajo Lake is now a meadow and Blue Spring Valley also saw the development of lava dams . As a consequence, water on the Markagunt Plateau flows underground through sinkholes developed in limestone rocks, and the burial of surface drainages by highly permeable lava flows likely aided in their development; some sinkholes have formed in basalt and other karstic features are also found in

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