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105-546: Well over 15,000 bones have been excavated from this Jurassic excavation site and there are many thousands more awaiting excavation and study. It was designated a National Natural Landmark in October 1965. The John D. Dingell, Jr. Conservation, Management, and Recreation Act , signed into law by President Donald Trump on March 12, 2019, named it as a national monument . All of these bones, belonging to different species, are found disarticulated and indistinctly mixed together. It

210-745: A Buddhist temple and Japanese Christian chapel – remain in downtown Salt Lake City. European ethnic groups and East Coast missionary groups constructed St. Mark's Episcopal Cathedral in 1874, B'nai Israel Temple in 1890, the Roman Catholic Cathedral of the Madeleine in 1909 and the Greek Orthodox Holy Trinity Cathedral in 1923. This time period also saw the creation of Salt Lake City's now defunct red-light district that employed 300 courtesans at its height before being closed in 1911. During

315-544: A corridor of contiguous urban and suburban development stretched along a 120-mile (190 km) segment of the Wasatch Front , comprising a population of 2,746,164 (as of 2021 estimates), making it the 22nd largest in the nation. With a population of 200,133 in 2020, it is the 117th most populous city in the United States . It is also the central core of the larger of only two major urban areas located within

420-450: A crocodile ( Goniopholis ), 2 turtles ( Glyptops ), 4 genera of gastropoda (snails), and 4 genera of charophyte. For a long time, the atypical predator/prey ratio (3:1) represented at the quarry was thought to be the result of possible pack hunting tendencies of Allosaurus . The high percentage of smaller individual allosaurs suggests that juveniles coordinated their efforts to capture and kill prey. They may have followed their prey into

525-401: A damaging windstorm with hurricane-force winds , amidst the wider national George Floyd protests , the global COVID-19 pandemic , and protests against pandemic measures . Salt Lake City has an area of 110.4 square miles (286 km ) and an average elevation of 4,327 feet (1,319 m) above sea level . The lowest point within the boundaries of the city is 4,210 feet (1,280 m) near

630-475: A fault segment was found at the southern edge of the convention center, and expansion plans were halted until more earthquake fault studies could be completed. The city, as well as the county , is laid out on a grid plan . Most major streets run very north–south and east–west. The grid's origin is the southeast corner of Temple Square, the block containing the Salt Lake Temple; the north–south axis

735-483: A flourishing Chinatown in Salt Lake City nicknamed "Plum Alley", which housed around 1,800 Chinese during the early 20th century. The Chinese businesses and residences were demolished in 1952 although a historical marker has been erected near the parking ramp which has replaced Plum Alley. Immigrants also found economic opportunities in the booming mining industries . Remnants of a once-thriving Japantown – namely

840-696: A fossil dinosaur egg, at the time the oldest such egg ever found. Over the years, excavations led by the University of Utah and the Natural History Museum of Utah have resulted in the collection of more than 12,000 fossil bones from the quarry. While most of the original fossils are currently housed at the Natural History Museum of Utah, many skeletons reproduced from Cleveland-Lloyd dinosaur remains are now on exhibit in more than 65 museums worldwide. Original specimens from

945-664: A large proportion of the Allosaurus specimens are juveniles, but until more evidence is recovered, this cannot yet be vindicated. Fossil taxa discovered at the Cleveland-Lloyd site include: Camptosaurus C. dispar Stegosaurus S. stenops The largest ornithischian reported from the quarry Apatosaurus A. sp Barosaurus B. sp Camarasaurus C. lentus 3 skeletons were unearthed Diplodocus D. sp Allosaurus A. fragilis 44 - 60 The largest theropod reported from

1050-571: A maximum difference of 7,099 feet (2164 m) being achieved with the rise of Twin Peaks from the Salt Lake Valley floor. The Salt Lake Valley floor is the ancient lakebed of Lake Bonneville , which existed at the end of the last ice age . Several Lake Bonneville shorelines can be distinctly seen as terraces on the foothills or benches of nearby mountains. Ancient folds of Lake Bonneville shorelines also lie underneath Salt Lake City, amplifying

1155-527: A more urban and suburban pattern, canal water companies were gradually replaced by culinary water systems. Downtown Salt Lake City has been a hub of commerce for the Intermountain West and its architecture reflects this history. Main Street , which was the primary commercial avenue for the city in the late 19th and early 20th centuries, anchors the historic core of the downtown area that begins at

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1260-493: A new dinosaur had been described by Madsen, then assistant research professor of geology and geophysics in the University of Utah. He named it Stokesosaurus clevelandi , honouring his mentor, professor William Lee Stokes. In 1976, another new dinosaur was described from fossils found in the quarry by Madsen. He named it Marshosaurus bicentesimus , honouring American paleontologist Othniel Charles Marsh (1831-1899). In 1987, Brigham Young University paleontologists excavated

1365-400: A new, larger facility was dedicated that has updated exhibits. The new visitor center generates its own electricity from rooftop solar panels. Early in 2019, the quarry reached the official status of " national monument " under the name of "Jurassic National Monument". The Cleveland-Lloyd Dinosaur Quarry of east central Utah has produced one of the most prolific dinosaurs bone assemblages in

1470-476: A result of a drought, and not a predator trap. One comparison with the La Brea Tar Pits suggests that multiple, non-migratory groups of Allosaurus may have come to the area looking to find water, dying due to the harsh conditions and perhaps from diseases caused by drinking contaminated water due to rotting carcasses and feces being present. The evidence for this theory is strengthened by the fact that

1575-527: A result, the population of the surrounding metropolitan area greatly outnumbers Salt Lake City. A major concern of recent government officials has been combating inner-city commercial decay. The city lost population from the 1960s through the 1980s, but experienced some recovery in the 1990s. Presently, the city has gained an estimated 5 percent of its population since the year 2000. The city has experienced significant demographic shifts in recent years. Hispanics now account for approximately 22% of residents and

1680-873: A role in the summer months, causing tropospheric ozone to peak in July & August, but in 2015 it started at the beginning of June. In 2016 Salt Lake's air quality was ranked 6th worst in the nation by the American Lung Association. It received an F grade for both ozone and particulate matter. Particulate pollution is considered especially dangerous, as the tiny pollutants can lodge deep in lung tissue. Both ozone and particulate pollution are associated with increased rates of strokes, heart attacks, respiratory disease, cancer and premature death. Outdoor air particulates have been associated with low and very low birth weight, premature birth, congenital defects, and death. Severe drought and water diversions have shrunk

1785-704: A site must be one of the best examples of a natural region's characteristic biotic or geologic features. Since the establishment of the NNL program, a multi-step process has been used to designate a site for NNL status. Since 1970, the following steps have constituted the process. Prospective sites for NNL designation are terrestrial and aquatic ecosystems; geological features, exposures, and landforms that record active geological processes or portions of earth history; and fossil evidence of biological evolution. Each major natural history "theme" can be further subdivided into various sub-themes. For example, sub-themes suggested in 1972 for

1890-481: A tendency to acquire or trade for these water rights. These can then be traded for culinary water rights to water imported into the valley. At its peak, irrigation in the valley comprised over one hundred distinct canal systems, many originating at the Jordan Narrows at the south end of the valley. Water and water rights were important in the 19th and early 20th centuries. As heavy agricultural usage changed into

1995-443: A total average of 60 inches (152 cm), although measurable snow has fallen as early as September 17 and as late as May 28. The snowiest season was 1951–52, with 117.3 inches (298 cm), while the least snowy season was 16.6 inches (42 cm) in 1933–34. The snowiest month on record was January 1993, in which 50.3 inches (128 cm) were recorded. The nearby Great Salt Lake is a significant contributor to precipitation in

2100-406: Is Main Street; and the east–west axis is South Temple Street. Addresses are coordinates within the system (similar to latitude and longitude ). Odd and even address numbering depends on the quadrant of the grid in which an address is located. The rule is: When traveling away from the grid center (Temple Square) or its axes (Main Street, South Temple Street), odd numbers will be on the left side of

2205-521: Is home to a significant LGBT community and hosts the annual Utah Pride Festival . It is the industrial banking center of the United States. Salt Lake City and the surrounding area are also the location of several institutions of higher education including the state's flagship research school, the University of Utah . Sustained drought in Utah has strained Salt Lake City's water security , caused

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2310-484: Is mediated by its unique geography, generally keeping highs and lows from reaching extremes. The primary source of precipitation in Salt Lake City is massive storms that move in from the Pacific Ocean along the jet stream from October to May. In mid-to-late summer, when the jet stream retreats far to the north, precipitation mainly comes from afternoon thunderstorms caused by monsoon moisture moving up from

2415-399: Is more economically diverse on the west side, which results in demographic differences. Interstate 15 was also built in a north–south line, further dividing east and west sides of the city. Sugar House , in southeastern Salt Lake City, has a reputation as an older neighborhood with small shops in the center. Sugar House is an area which has been the focus of redevelopment efforts such as

2520-436: Is only 22%. Winters are quite cold but rarely frigid. While an average of 127 days drop to or below freezing, and 26 days with high temperatures that fail to rise above freezing, the city only averages 6.3 days at or below 10 °F (−12.2 °C). The record high temperature is 107 °F (42 °C), which occurred first on July 26, 1960, July 13, 2002, June 16, 2021, July 17, 2022, and most recently September 7, 2022, while

2625-625: Is the capital and most populous city of the U.S. state of Utah . It is the county seat of Salt Lake County , the most populous county in the state. The city is the core of the Salt Lake City Metropolitan Statistical Area (MSA), which had a population of 1,257,936 at the 2020 census. Salt Lake City is further situated within a larger metropolis known as the Salt Lake City–Ogden–Provo Combined Statistical Area ,

2730-438: Is the right place, drive on." Brigham Young is said to have seen the area in a vision before the wagon train's arrival. They found the broad valley empty of any human settlement. Four days after arriving in the Salt Lake Valley, Brigham Young designated the building site for the Salt Lake Temple. The Salt Lake Temple, constructed on the block later called Temple Square, took 40 years to complete. Construction started in 1853, and

2835-618: The American Old West . The first group of settlers brought African slaves with them, making Utah the only place in the western United States to have African slavery. Three slaves, Green Flake, Hark Lay, and Oscar Crosby, came west with the first group of settlers in 1847. The settlers also began to purchase Indian slaves in the well-established Indian slave trade, as well as enslaving Indian prisoners of war. In 1850, 26 slaves were counted in Salt Lake County. In 1852,

2940-468: The Great Basin (the other being Reno, Nevada ). Salt Lake City was founded on July 24, 1847, by early pioneer settlers led by Brigham Young who were seeking to escape persecution they had experienced while living farther east. The Mormon pioneers , as they would come to be known, entered a semi-arid valley and immediately began planning and building an extensive irrigation network which could feed

3045-518: The Gulf of California . Although rainfall can be heavy, these storms are usually scattered in coverage and rarely severe. However, downtown was hit by an F2 tornado on August 11, 1999, killing 1 person, injuring 60, and causing $ 170 million in damage. The remnants of tropical cyclones from the East Pacific can rarely reach the city during Fall. The remnants of Hurricane Olivia helped bring

3150-578: The Historic Sites Act of August 21, 1935 (49 Stat. 666, 16 U.S.C. 641); the program is governed by federal regulations. The NNL Program does not have the protection features of Section 106 of the National Historic Preservation Act of 1966. Thus, the designation of a National Natural Landmark presently constitutes only an agreement with the owner to preserve, as far as possible, the significant natural values of

3255-787: The Hotel Newhouse , and the Salt Lake Theatre . After a period of stagnation in the era of urban sprawl , and with the construction of TRAX in the late 1990s and the City Creek Center in the early 2010s, downtown Salt Lake City is experiencing a period of revival. Empty lots and older structures are in the process of being redeveloped into apartment and office towers and the city has begun to close Main Street to automobile traffic on summer weekends to encourage pedestrian activity and business. More than 5,000 new residential units are planned or under construction for

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3360-631: The Jordan River and the Great Salt Lake, and the highest is Grandview Peak , at 9,410 feet (2,868 m). The city is in the northeast corner of the Salt Lake Valley surrounded by the Great Salt Lake to the northwest, the steep Wasatch Range to the east, and Oquirrh Mountains to the west. Its encircling mountains contain several narrow canyons, including City Creek , Emigration , Millcreek , and Parley's which border

3465-822: The National Park Service , U.S. Forest Service , Bureau of Land Management , Bureau of Reclamation , Fish and Wildlife Service , Air Force , Marine Corps , Army Corps of Engineers , Navy , and others. Some NNLs has been designated on lands held by Native Americans or tribes. NNLs also have been designated on state lands that cover a variety of types and management, such as forest , park , game refuge , recreation area , and preserve. Private lands with NNLs include those owned by universities, museums , scientific societies, conservation organizations, land trusts , commercial interests, and private individuals. Approximately 52% of NNLs are administered by public agencies, more than 30% are entirely privately owned, and

3570-844: The Salt Lake Temple and concludes at the City and County Building . Halfway between those two structures, the Walker Center , at the corner of Main and 200 South, was built in 1912 and was the tallest building between Chicago and San Francisco upon its completion. Other extant pre-war structures include the Kearns Building , Hotel Monaco , the First Security Building, the Joseph Smith Memorial Building (formerly Hotel Utah),

3675-606: The UTA S-Line Streetcar . In late 2015 there were approximately 900 apartment units either recently built or under construction in the Sugar House area, with an additional 492 units proposed. Northeast of Downtown is The Avenues, a neighborhood outside of the regular grid system on smaller blocks. The area between 6th Avenue to South Temple Street is a Historical District that is nearly entirely residential, and contains many historical Victorian era homes. Recently

3780-477: The University of Utah , commercial precincts, and the Wasatch foothills. The western neighborhoods of the city, such as Poplar Grove , Rose Park , and Glendale tend to be more working-class and ethnically diverse and are popular with immigrants and young people. This divide is a result of the railroad being built in the western half as well as panoramic views from inclined ground in the eastern portion. Housing

3885-631: The Utah State Capitol and Democratic lawmakers have introduced legislation in the Utah State Legislature to make public transportation free during January and July, when air quality is usually at its worst. The population of the Salt Lake City metropolitan area is projected to double by 2040, putting further pressure on the region's air quality. The Great Salt Lake is separated from Salt Lake City by extensive marshlands and mudflats. The metabolic activities of bacteria in

3990-573: The geological and ecological history of the United States. It also hopes to strengthen the public's appreciation of the country's natural heritage. As of July 2024, 605 sites have been added to the National Registry of Natural Landmarks. The registry includes nationally significant geological and ecological features in 48 states, American Samoa , Guam , Puerto Rico , and the U.S. Virgin Islands . The National Park Service administers

4095-451: The liquefaction of the clay- and sand-based soil and the possible permanent flooding of portions of the city by the Great Salt Lake. On March 18, 2020, a 5.7 magnitude earthquake , the largest in the Salt Lake City area in modern times, hit Magna , just southwest of Salt Lake City, causing some minor damage throughout the valley. Damage in Salt Lake City was especially evident in historic brick homes— unreinforced masonry buildings —such as

4200-570: The territorial prison in Sugar House in the 1880s for violation of anti-polygamy laws. The church began its eventual abandonment of polygamy in 1890, releasing "The Manifesto" , which officially suggested members obey the law of the land (which was equivalent to forbidding new polygamous marriages inside the US and its territories, but not in church member settlements in Canada and Mexico). This paved

4305-652: The 1892 Sears mansion which required demolition after the earthquake. The Warm Springs Fault and the East Bench Fault, offshoots of the Wasatch Fault, were found in 2021 to connect underneath Salt Lake City, increasing the risk of major metropolitan damage from an earthquake. Prior to this, in 1997 the Salt Lake Tribune published a front-page exposé about how the construction of the downtown Salt Palace convention center had been hastened by

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4410-419: The 1970s. Salt Lake City has a humid continental climate ( Dsa ), while western parts may experience a Mediterranean climate ( Csa ), as summers are dry and hot and winters are cold and wet, but rarely frigid. Late summer and early fall monsoonal activity can keep precipitation fairly consistent throughout the year aside from early to mid summer when rain is minimal. The temperature of the Salt Lake City area

4515-663: The Avenues is becoming known for restaurants and shops opening in old retail space mixed within the community. The Avenues are situated on the upward-sloping bench in the foothills of the Wasatch Range, with the earlier built homes in the lower elevation. The Avenues, along with Federal Heights , just to the east and north of the University of Utah , and the Foothill area, south of the university, contain gated communities, large, multimillion-dollar houses, and panoramic views of

4620-791: The Boston and Newhouse Buildings, the Utah State Capitol , and the Clift Building . Salt Lake City has two historic passenger rail depots, the Denver and Rio Grande Western Depot and the Union Pacific Depot , the latter of which now anchors the Gateway district. Salt Lake City lost many significant structures to forces such as urban renewal in the 20th century, including the Dooly Building , designed by Louis Sullivan ,

4725-635: The Confederate States of America, marched through the city and found it had been evacuated. They continued their march through the deserted city to vacant land at the southwest corner of the valley. There they set up Camp Floyd (40 miles (64 km) south of the city). Another military installation, Fort Douglas , was established in 1862 to maintain Union allegiance during the American Civil War . Many area leaders were incarcerated at

4830-404: The Great Salt Lake level to drop to record low levels, and has impacted the local and state economy. The receding lake has exposed arsenic which may become airborne, exposing area residents to poisonous dust. The city is also under threat of major earthquake damage amplified by two offshoots of the nearby Wasatch Fault that join underneath the downtown area. Before settlement by members of

4935-687: The LDS Church, the Shoshone , Weber Ute, and Paiute had dwelt in the Salt Lake Valley for thousands of years. At the time of Salt Lake City's founding, the valley was within the territory of the Northwestern Shoshone . One local Shoshone tribe, the Western Goshute tribe, had names for the Jordan River , City Creek , and Red Butte Canyon (Pi'o-gwût, So'ho-gwût, and Mo'ni-wai-ni). The Goshutes (or, Gosiutes) also lived in

5040-609: The Latter-day Saints in July 1847, during the Mexican-American War . They had traveled beyond the boundaries of the United States into Mexican Territory seeking a secluded area to safely practice their religion away from the violence and the persecution they experienced in the United States . Upon arrival at the Salt Lake Valley, president of the church Brigham Young is recorded as stating, "This

5145-582: The NNL Program and, if requested, assists NNL owners and managers with the conservation of these important sites. Land acquisition by the federal government is not a goal of this program. National Natural Landmarks are nationally significant sites owned by a variety of land stewards, and their participation in this federal program is voluntary. The legislative authority for the National Natural Landmarks Program stems from

5250-602: The Olympic games, but business did not pick up immediately following. On July 24, 2024, Salt Lake City was formally chosen by the International Olympic Committee (IOC) to host the 2034 Olympic Winter Games. All of the facilities from the previous Games can be re-used, and the bid enjoyed support from the IOC and the city. Salt Lake City hosted the 16th Winter Deaflympic games in 2007, taking place in

5355-556: The President of the United States to appoint a surveyor general for Utah Territory, and to cause that the lands of that territory should be surveyed preparatory to bringing them on the market. Because of numerous conflicts between the surveyor and the territorial government the first surveyor general abandoned his post in 1857, not to return till 1869. The pioneers organized a state called State of Deseret , and petitioned for its recognition in 1849. The United States Congress rebuffed

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5460-416: The US but also from countries all around the world, in exchange of financial and excavation assistance. The project continued until 1976 when the University of Utah interrupted the funding. Madsen managed to continue excavating the quarry by means of a private company he founded the same year, Dinolab, intended to sell casts of dinosaur skeletons to museums, institutions and private buyers. Before that, in 1974,

5565-643: The Upper Jurassic beds of North America. The quarry is part of the Brushy Basin Member of the Morrison Formation . The fossil deposit consists of a calcareous smectitic mudstone which accumulated on the floodplain of an anastomosing river system. An anastomosing river system consists of multiple interconnected channels confined by prominent levees separated by interchannel topographic lows. The depositional environment of

5670-462: The Wasatch Range. The second-highest mountain range is the Oquirrhs, reaching a maximum height of 10,620 feet (3,237 m) at Flat Top. The east–west-oriented Traverse Mountains to the south extend to 6,000' (1830m), nearly connecting the Wasatch and Oquirrh Mountains. The mountains near Salt Lake City are easily visible from the city and have sharp vertical relief caused by ancient earthquakes, with

5775-548: The area and collected 800 bones. In 1939-41 a field party of Princeton University , led by William Lee Stokes (1915–1994, known as the "Father of Utah geology"), came on site to extensively dig up specimens. Because of the proximity to Cleveland, Utah, and because these expeditions were financed by Malcolm Lloyd, the site was later known as the Cleveland-Lloyd Quarry. In three summers, the 1939-1941 Princeton expeditions collected 1,200 bones. A part of these bones

5880-621: The bulb of the native sego lily , which has long been part of the ordinary diet of the Shoshone, sego being derived from the Shoshone word seego . The sego lily was commemorated by the Sego Lily Dam, a flood-prevention infrastructure project in the shape of a giant sego lily, built in Sugar House Park in 2017. The city was not platted until after the federal surveyor abandoned his post in 1857. In 1855 Congress directed

5985-408: The city has a significant LGBT community. There is also a large Pacific Islander population (mainly Samoans and Tongans ); they compose roughly 2% of the population of the Salt Lake Valley area. Salt Lake City was selected in 1995 to host the 2002 Winter Olympics. The games were plagued with controversy. A bid scandal surfaced in 1998 alleging bribes had been offered to secure the bid. During

6090-464: The city when UTA's TRAX opened in 1999. The S Line (formerly known as Sugar House Streetcar) opened for service in December 2013 on an old D&RGW right-of-way. The city's population began to stagnate during the 20th century as population growth shifted to suburban areas north and south of the city. Few of these areas were annexed to the city, while nearby towns incorporated and expanded. As

6195-411: The city. The city also has a belt route , I-215. Salt Lake City has developed a strong tourist industry based primarily on skiing , outdoor recreation , and religious tourism . It hosted the 2002 Winter Olympics and will host the 2034 Winter Olympics . It is known for its politically liberal culture, which stands in contrast with most of the rest of the state's highly conservative leanings. It

6300-613: The city. The lake effect can enhance rain from summer thunderstorms and produces lake-effect snow approximately 6 to 8 times per year, some of which can produce prodigious snowfall amounts. It is estimated about 10% of the annual precipitation in the city can be attributed to the lake effect. Salt Lake City features large variations in temperatures between seasons. During summer, there are an average of 56 days per year with temperatures of at least 90 °F (32.2 °C), 23 days of at least 95 °F (35 °C), and 9 days of 100 °F (37.8 °C). However, average daytime July humidity

6405-539: The conservation of outstanding examples of the natural history of the United States . It is the only national natural areas program that identifies and recognizes the best examples of biological and geological features in both public and private ownership. The program was established on May 18, 1962, by United States Secretary of the Interior Stewart Udall . The program aims to encourage and support voluntary preservation of sites that illustrate

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6510-498: The county geologist who erased the Warm Springs Fault from earthquake maps of Salt Lake City so that the downtown area appeared to be free of faults, enabling the convention center developers to avoid the time and expense of an earthquake hazard and risk assessment. The newspaper showed that the Warm Springs Fault runs north–south along W. Temple, directly adjacent to Temple Square and the convention center. A year later,

6615-422: The danger of earthquakes. Salt Lake City is subject to earthquakes from active fault lines running through it. These faults are related to the regional Wasatch Fault which runs north–south along the western base of the Wasatch Range and is considered at high risk of producing an earthquake as large as 7.5 magnitude . Catastrophic damage is predicted in the event of an earthquake with major damage resulting from

6720-485: The designation. It is conceivable that state or local governments of their own volition could initiate regulations or zoning that might apply to an NNL. However, as of 2005 no examples of such a situation have been identified. Some states require planners to ascertain the location of NNLs. Listed by state or territory in alphabetical order. As of July 2024, there were 605 listings. Salt Lake City, Utah Salt Lake City , often shortened to Salt Lake or SLC ,

6825-497: The downtown area as of April 2021 and many new breweries and restaurants have opened in the last decade. Regent Street, which in the early 20th century was the city's red-light district , has recently been redeveloped with the notable additions of the 2,468-seat Eccles Theater and 111 Main, an adjacent 24-story office building. A distinctive feature of Salt Lake City's cityscape is its very large block sizes, which are 660 feet square and separated by streets 132 feet wide, making them

6930-513: The eastern city limits. The burgeoning population of Salt Lake City and the surrounding metropolitan area, combined with its geographical situation, has led to air quality becoming a concern. The Great Basin is subject to strong temperature inversions during the winter, which trap pollutants and decrease the air quality. The Utah Division of Air Quality monitors air quality and issues alerts for voluntary and mandatory actions when pollution exceeds federal safety standards. Protests have been held at

7035-403: The floodpond and subsequently became mired themselves. The close spatial proximity of skull elements (most belonging to Allosaurus ) seemingly supported this hypothesis. Larger individual theropods almost certainly became mired while attempting to scavenge the carcasses of other entrapped dinosaurs (Richmond and Morris, 1996). However, more recent studies suggest that the mass deaths were in fact

7140-507: The games, other scandals erupted over contested judging scores and illegal drug use. Despite the controversies, the games were heralded as a financial success, being one of the few in recent history to turn a profit. In preparation major construction projects were initiated. Local freeways were expanded and repaired, and a light rail system was constructed. Olympic venues are now used for local, national, and international sporting events and Olympic athlete training. Tourism has increased since

7245-413: The lake result in a phenomenon known as "lake stink", a scent reminiscent of foul poultry eggs, two to three times per year for a few hours. The Jordan River flows through the city and is a drainage of Utah Lake that empties into the Great Salt Lake. The highest mountaintop visible from Salt Lake City is Twin Peaks , which reaches 11,330 feet (3,450 m). Twin Peaks is southeast of Salt Lake City in

7350-516: The largest in the United States. This and the resulting development patterns gives the city and its buildings a unique sense of scale but also a distinct challenge to urban walkability , with many streets boasting six lanes for automobile traffic. On the other hand, the extra-wide streets have made the addition of dedicated transit lanes and light rail more feasible and many streets are now being redesigned with features such as protected bike lanes, linear parks, and even spaces for urban development within

7455-425: The late 19th and early 20th centuries, an extensive streetcar system was constructed throughout the city, with the first streetcar running in 1872 and electrification of the system in 1889. As in the rest of the country, the automobile usurped the streetcar, and the last trolley was approved for conversion in 1941, yet ran until 1945, due to World War II . Trolley buses ran until 1946. Light rail transit returned to

7560-449: The majority being carnivorous dinosaurs including Allosaurus (material from at least 44 individuals make up almost 67% of all remains), Torvosaurus (1), Ceratosaurus (1), Stokesosaurus (2), Marshosaurus (2), and a Tanycolagreus (1). Herbivorous dinosaurs include Camarasaurus (3), Diplodocus (1), Barosaurus (1), Apatosaurus (1), Camptosaurus (5), and Stegosaurus (4). Non-dinosaurian fauna include

7665-470: The meantime, and because excavations had been interrupted by the war, work started again in 1960, when young paleontologist James Henry Madsen Jr. (1932-2009) was hired within the University of Utah to assist William Lee Stokes with the excavations. As of 1960 Stokes and Madsen founded the "University of Utah Cooperative Dinosaur Project", with funds of the University of Utah. This project granted casts or specimens of dinosaurs to museums and institutions from

7770-535: The medians. The city also encourages new projects to incorporate mid-block walkways and other scale-mitigation strategies into planning to promote pedestrian engagement. Salt Lake City has many distinct neighborhoods. There is a general east–west socioeconomic divide. The eastern neighborhoods of the city, such as the Avenues , 9th & 9th , Yalecrest , Federal Heights , and Sugar House tend to be more affluent. These districts are popular with professionals, families, and students due to their proximity to Downtown,

7875-525: The menu from a high-society ball. Disputes with the federal government ensued over the church's practice of polygamy . A climax occurred in 1857 when President James Buchanan declared the area in rebellion after Brigham Young refused to step down as governor, beginning the Utah War . A division of the United States Army , commanded by Albert Sidney Johnston , later a general in the army of

7980-599: The nearby Utah Valley (the 1776 Dominguez-Escalante expedition were undoubtedly aware of Salt Lake Valley's existence). U.S. Army officer John C. Frémont surveyed the Great Salt Lake and the Salt Lake Valley in 1843 and 1845. The Donner Party , a group of ill-fated pioneers, had traveled through the Great Salt Lake Valley in August 1846. The settling of Salt Lake City dates to the arrival of

8085-647: The overall theme "Lakes and ponds" included large deep lakes, large shallow lakes, lakes of complex shape, crater lakes , kettle lake and potholes, oxbow lakes , dune lakes, sphagnum-bog lakes, lakes fed by thermal streams, tundra lakes and ponds, swamps and marshy areas , sinkhole lakes, unusually productive lakes, and lakes of high productivity and high clarity. The NNL program does not require designated properties to be owned by public entities. Lands under almost all forms of ownership or administration have been designated—federal, state, local, municipal, and private. Federal lands with NNLs include those administered by

8190-469: The population and foster future growth. Salt Lake City's street grid system is based on a standard compass grid plan, with the southeast corner of Temple Square (the area containing the Salt Lake Temple in downtown Salt Lake City) serving as the origin of the Salt Lake meridian . Owing to its proximity to the Great Salt Lake , the city was originally named Great Salt Lake City. In 1868, the word "Great"

8295-532: The property nor induce any encumbrances on the property. NNL status does not transfer with changes in ownership. Participation in the NNL Program involves a voluntary commitment on the part of the landowner(s) to retain the integrity of their NNL property as it was when designated. If "major" habitat or landscape destruction is planned, participation in the NNL Program by a landowner would be disingenuous and meaningless. The federal action of designation imposes no new land use restrictions that were not in effect before

8400-549: The quarry Ceratosaurus C. dentisulcatus (may just represent the adult form of C. nasicornis ) 1 The rarest theropod species in the quarry Marshosaurus M. bicentesimus 2 Stokesosaurus S. clevelandi 2 The largest coelurosaur reported from the quarry Tanycolagreus T. topwilsoni 1 Remains originally referred to Stokesosaurus clevelandi . Torvosaurus T. tanneri 1 National Natural Landmark The National Natural Landmarks ( NNL ) Program recognizes and encourages

8505-529: The quarry mudstone was an interchannel seasonal accumulation of clay nested in a topographic low between channel levees called a floodpond. Dinosaurs came to the floodpond during a drought in search of water, with the herbivores and smaller carnivores falling prey to the large theropods present for food. As the drought continued, the dinosaurs present dwindled until eventually adult Allosaurus would resort to cannibalizing juvenile individuals for survival. The preserved fauna consists of almost all dinosaurs with

8610-936: The quarry remain on public exhibit in Utah at the Natural History Museum of Utah in Salt Lake City , the Utah State University Eastern Prehistoric Museum in Price and the Earth Science Museum at Brigham Young University in Provo . The U.S. Department of the Interior, Bureau of Land Management (BLM) opened a visitor center at the Cleveland-Lloyd Dinosaur Quarry in 1968. This was the first-ever BLM visitor center. On April 28, 2007

8715-418: The record low is −30 °F (−34 °C), which occurred on February 9, 1933. During mid-winter, strong areas of high pressure often stagnate over the Great Basin , leading to strong temperature inversions . This causes air stagnation and thick smog in the valley from several days to weeks at a time and can result in the nation's worst air-pollution levels. This same effect will also occasionally play

8820-631: The record monthly precipitation of 7.04 inches (179 mm) in September 1982. 1983 was the wettest year on record, with 24.26 inches (616 mm), while 1979 was the driest, when 8.70 inches (221 mm) were recorded. Spring snowmelt from the surrounding mountains can cause localized stream flooding during late spring and early summer, the worst examples being in 1952 and especially 1983, when City Creek burst its banks, forcing city engineers to convert several downtown streets into waterways. Snow falls on average from November 6 to April 18, producing

8925-483: The remaining 18% are owned or administered by a mixture of public agencies and private owners. Participation in the NNL Program carries no requirements regarding public access. The NNL registry includes many sites of national significance that are open for public tours, but others are not. Since many NNLs are located on federal and state property, permission to visit is often unnecessary. Some private properties may be open to public visitation or just require permission from

9030-626: The rest of the city. Smith's Plat of Zion specified the city was to be developed into 135 10-acre (4.0 ha) lots. However, the blocks in Salt Lake City became irregular during the late 19th century when the Church of Jesus Christ of Latter-day Saints lost authority over growth and before the adoption of zoning ordinances in the 1920s. The original 10-acre (4.0 ha) blocks allowed for large garden plots, and many were supplied with irrigation water from ditches that ran approximately where modern curbs and gutters would be laid. The original water supply

9135-482: The settlers in 1850 and established the Utah Territory , vastly reducing its size, and designated Fillmore as its capital city. Great Salt Lake City replaced Fillmore as the territorial capital in 1856, and the name later was shortened to Salt Lake City. The city's population continued to swell with an influx of converts to the LDS Church and Gold Rush gold seekers, making it one of the most populous cities in

9240-420: The site manager. On the other hand, some NNL private landowners desire no visitors whatsoever and might even prosecute trespassers . The reasons for this viewpoint vary: potential property damage or liability , fragile or dangerous resources, and desire for solitude or no publicity. NNL designation is an agreement between the property owner and the federal government. NNL designation does not change ownership of

9345-482: The site or area. Administration and preservation of National Natural Landmarks is solely the owner's responsibility. Either party may terminate the agreement after they notify the other. The NNL designation is made by the Secretary of the Interior after an in-depth scientific study of a potential site. All new designations must have owner concurrence. The selection process is rigorous: to be considered for NNL status,

9450-455: The source of the unusual width. These wide streets and grid pattern are typical of other Mormon towns of the pioneer era throughout the West. Though the nomenclature may initially confuse new arrivals and visitors, most consider the grid system an aid to navigation. Some streets have names, such as State Street, which would otherwise be known as 100 East. Other streets have honorary names, such as

9555-595: The street. A common explanation for the unusually wide streets of Salt Lake City is that Brigham Young wanted a wagon with a team of oxen to be able to turn around. However, Young was never recorded giving this directive. Joseph Smith, founder of the Latter Day Saint movement, planned the layout in the " Plat of the City of Zion " (intended as a template for Mormon towns wherever they might be built). This plan included streets 132 ft (40 m) wide, and may be

9660-543: The summer of 2007, 9th and 9th saw sidewalk and street improvements as well as an art installation by Troy Pillow of Seattle, Washington inspired by the 9 Muses of Greek myth, thanks in part to a monetary grant from Salt Lake City. Many of the homes in the valley date from pre–World War II times, and only a select few areas, such as Federal Heights and the East Bench, as well as the far west side, including parts of Rose Park and Glendale, have seen new home construction since

9765-412: The temple was dedicated on April 6, 1893. The temple has become an icon for the city and serves as its centerpiece. The southeast corner of Temple Square is the point of reference for the Salt Lake meridian , and for all addresses in the Salt Lake Valley. During the winter of 1847, an outbreak of measles killed many of the Shoshone in the area. The Shoshone saved the pioneers when they taught them to eat

9870-598: 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. On June 19, 1862, during the American Civil War , Congress prohibited slavery in all US territories. Explorer, ethnologist, and author Richard Francis Burton traveled by coach in the summer of 1860 to document life in Great Salt Lake City. He

9975-594: The valley. Many consider this some of the most desirable real estate in the valley. In addition to larger centers like Sugar House and Downtown, Salt Lake City contains several smaller neighborhoods, each named after the closest major intersection. Two examples are the 9th and 9th (at the intersection of 900 East and 900 South Streets) and 15th & 15th (at the intersection of 1500 East and 1500 South Streets) neighborhoods. These areas are home to foot-traffic friendly, amenities-based businesses such as art galleries, clothing retail, salons, restaurants and coffee shops. During

10080-423: The venues in Salt Lake City and Park City , and Rotary International chose the city as the host site of their 2007 convention, which was the single largest gathering in Salt Lake City since the 2002 Winter Olympics. The U.S. Volleyball Association convention in 2005 drew 39,500 attendees. In 2020, the city experienced a 5.7 magnitude earthquake , protests against the killing of Bernardo Palacios-Carbajal , and

10185-541: The vicinity of Salt Lake and the valleys to the west. The land was treated by the United States as public domain; no aboriginal title by the Northwestern Shoshone was ever ceded or relinquished by treaty with the United States. The first explorer of European descent in the Salt Lake area was likely Jim Bridger in 1825, although others had been in Utah earlier, including some who traveled as far north as

10290-494: The visitor center, along with many other exhibits. A renovated and expanded quarry visitor center was dedicated on April 28, 2007. The visitor center is open seasonally with variable hours. The quarry was found by sheepherders and cattlemen as they drove their animals through the area during the late 19th century. In 1927, the Department of Geology at the University of Utah , under the direction of Chairman F.F. Hintze, visited

10395-582: The way for statehood in 1896, when Salt Lake City became the state capital. The First Transcontinental Railroad was completed in 1869 at Promontory Summit on the north side of the Great Salt Lake. A railroad was connected to the city from the Transcontinental Railroad in 1870, making travel less burdensome. Mass migration of different groups followed. Ethnic Chinese (who had laid most of the Central Pacific railway) established

10500-604: The western portion of 300 South, named "Adam Galvez Street" (for a local Marine corporal killed in action) or others honoring Rosa Parks , Martin Luther King Jr. , César Chávez , Harvey Milk , and John Stockton . These honorary names appear only on street signs and cannot be used in postal addresses. In the Avenues neighborhood , north–south streets are given letters of the alphabet, and east–west streets are numbered in 2.5-acre (1.0 ha) blocks, smaller than those in

10605-520: Was dropped from the city's name. Immigration of international members of the Church of Jesus Christ of Latter-day Saints (LDS Church), mining booms , and the construction of the first transcontinental railroad brought economic growth, and the city was nicknamed "The Crossroads of the West". It was traversed by the Lincoln Highway , the first transcontinental highway, in 1913. Two major cross-country freeways, I-15 and I-80 , now intersect in

10710-528: Was from City Creek . Subsequent development of water resources was from successively more southern streams flowing from the mountains east of the city. Some old irrigation ditches are still visible in the eastern suburbs, or are still marked on maps, years after they were gone. There are still some canals that deliver water as required by water rights. Many lots, in Salt Lake City and surrounding areas, have irrigation water rights attached to them. Local water systems, in particular Salt Lake City Public Utilities, have

10815-467: Was granted unprecedented access during his three-week visit, including audiences with Brigham Young and other contemporaries of Joseph Smith. The records of his visit include sketches of early city buildings, a description of local geography and agriculture, commentary on its politics and social order, essays, speeches, and sermons from Young, Isaac Morley, George Washington Bradley and other leaders, and snippets of everyday life such as newspaper clippings and

10920-485: Was hypothesized by Peter Dodson in 1980 that this strong concentration of mixed fossilized bones was due to a " predator trap ", however it is more likely that this site was actually caused by an extreme drought. No strict scientific consensus currently exists. The visitor center is administered by the Bureau of Land Management . There is a skeleton reconstruction of an adult Allosaurus (and other bones) on display in

11025-411: Was sent to Princeton and eventually the bones were sorted to mount a complete composite skeleton of Allosaurus , but World War II broke out and the skeleton was not mounted and exhibited in the University until February 1961. This Allosaurus skeleton, still nowadays on display at Guyot Hall , in the campus of New Jersey, is most likely the first Allosaurus skeletal mount obtained from the quarry. In

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