A swamp is a forested wetland . Swamps are considered to be transition zones because both land and water play a role in creating this environment. Swamps vary in size and are located all around the world. The water of a swamp may be fresh water , brackish water , or seawater . Freshwater swamps form along large rivers or lakes where they are critically dependent upon rainwater and seasonal flooding to maintain natural water level fluctuations. Saltwater swamps are found along tropical and subtropical coastlines. Some swamps have hammocks , or dry-land protrusions, covered by aquatic vegetation , or vegetation that tolerates periodic inundation or soil saturation. The two main types of swamp are "true" or swamp forests and "transitional" or shrub swamps . In the boreal regions of Canada, the word swamp is colloquially used for what is more formally termed a bog , fen , or muskeg . Some of the world's largest swamps are found along major rivers such as the Amazon , the Mississippi , and the Congo .
65-654: Swampy means "of or resembling a swamp ". Swampy may also refer to: Swamp Swamps and marshes are specific types of wetlands that form along waterbodies containing rich, hydric soils. Marshes are wetlands, continually or frequently flooded by nearby running bodies of water, that are dominated by emergent soft-stem vegetation and herbaceous plants. Swamps are wetlands consisting of saturated soils or standing water and are dominated by water-tolerant woody vegetation such as shrubs, bushes, and trees. Swamps are characterized by their saturated soils and slow-moving waters. The water that accumulates in swamps comes from
130-401: A chance to leave the city behind for a week or more. The camp used tent cabins with a central restroom and shower house. Atop a rise was the main lodge where meals were provided and a trading post with a bowling alley were maintained. The national park acquired three Lustron houses during its land acquisition process. The Jacob Klien House was located in an endangered habitat. It was moved to
195-583: A classic example of wetland loss from these combined factors. Europe has likely lost nearly half its wetlands. New Zealand lost 90 percent of its wetlands over a period of 150 years. Ecologists recognize that swamps provide ecological services including flood control, fish production, water purification, carbon storage, and wildlife habitats. In many parts of the world authorities protect swamps. In parts of Europe and North America, swamp restoration projects are becoming widespread. The United States government began enforcing stricter laws and management programs in
260-482: A key hunting ground for villages over a wide area. It wasn't until the 19th century that native villages once again were scattered through the area, but this was soon followed by European settlement. Joseph Bailly was the earliest recorded settler in the dunes. He moved here from trading villages around Niles, Michigan . Settling along the Calumet River . Soon he was joined by a series of other settlers and
325-508: A postglacial kettle moraine left behind about 14,000 years before the present by the melting of the ice sheet during the end of the last glacial period . The acidic bog is noted for pitcher plants and other wetland species. Access to the bog is restricted to ranger-led guided tours. This is the location of the pioneer trading post established in 1822 by fur trade pioneer Joseph Bailly . Bailly settled here and his last home, adapted from his 1830s retirement house, survives. The Homestead
390-408: A variety of sources including precipitation, groundwater, tides and/or freshwater flooding. These hydrologic pathways all contribute to how energy and nutrients flow in and out of the ecosystem. As water flows through the swamp, nutrients, sediment and pollutants are naturally filtered out. Chemicals like phosphorus and nitrogen that end up in waterways get absorbed and used by the aquatic plants within
455-401: A very low property value compared to fields, prairies , or woodlands . They have a reputation for being unproductive land that cannot easily be utilized for human activities, other than hunting , trapping , or fishing. Farmers, for example, typically drained swamps next to their fields so as to gain more land usable for planting crops, both historically, and to a lesser extent, presently. On
520-621: A vote in the Senate during the 115th Congress. The Consolidated Appropriations Act of 2019 included the bill as a provision and was signed by President Donald Trump on February 15, creating the country's 61st National Park and the first in Indiana. The creeks and rivers of the national park include: According to the Köppen climate classification system, Indiana Dunes National Park has a hot summer Humid continental climate ( Dfa ). According to
585-428: Is a hardwood forest. The great blue heron nests for which the site is named are no longer a feature of the area. Spring brings out a variety of wildflowers. Hobart Prairie Grove is an area of forested ravines along the west shore of Lake George . The Hobart Prairie Grove preserves several habitats including wetlands, prairie remnants, white oak flatlands, and a rare bur oak savanna . At about 300 acres (120 ha),
650-638: Is a large swamp in the western Siberia area of the Russian Federation . This is one of the largest swamps in the world, covering an area larger than Switzerland . The Atchafalaya Swamp at the lower end of the Mississippi River is the largest swamp in the United States . It is an important example of the southern cypress swamp but it has been greatly altered by logging, drainage, and levee construction. Other famous swamps in
715-611: Is a visible sand ridge along Ridge Road through Lake and Porter Counties, Indiana. Two older shorelines, the Tolleston and the Glenwood Shoreline are much harder to identify and further south in those counties. During the periods of glacial retreat, there were periods of stability. During these times, glacial lakes formed along the southern borders of the glaciers, bound into the Lake Michigan Basin by
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#1732772798701780-509: Is called a "living dune". Mount Baldy is accessible from U.S. Route 12 (also known as Dunes Highway ) between the Town of Pines and the western border of Michigan City. Visitors were formerly allowed to hike 0.7 miles (1.1 km) up the dune. As of July 2018 , much of the dune itself, including the summit, was closed to allow beach grasses and other native plants to regenerate, and prevent injuries to visitors. An alternative trail leading to
845-501: Is like the word "cat" without the "t".) The Little Calumet River Trail provides access through the prairie. It is accessible from the Mnoké Prairie parking lot on Beam Street. Mount Baldy is a sand dune located at the east end of the park. At 123 feet (37 m) tall, it is one of the tallest sand dunes on the southern shore of Lake Michigan. It is a wandering dune that moves an average of 4 feet (1.2 m) every year, and so
910-661: Is listed on the National Register of Historic Places and is located in the east portion of the park. The district consists of a total of five buildings, all from the Homes of Tomorrow Exhibition during the 1933 Century of Progress World's Fair which took place in Chicago. Created by the Good Fellow Club of U.S. Steel in 1941, the camp served the children of Gary , until 1977. It provided outdoor recreation and
975-875: Is roughly the shoreline south to U.S. 12 between the Burns Ditch west to Broadway in downtown Gary, Indiana . In addition, there are several outlying areas, including Pinhook Bog , in LaPorte County to the east; the Heron Rookery in Porter County , the center of the park; and the Hoosier Prairie State Nature Preserve and the Hobart Prairie Grove, both in Lake County , the western end of
1040-650: Is the remnants of the marsh lands and inter-dunal or inter-sand spit lakes that have formed this region over 40,000 years. The park is in the central forest-grasslands transition ecoregion . According to the A. W. Kuchler U.S. Potential natural vegetation Types, Indiana Dunes National Park has an Oak / Hickory ( 100 ) potential vegetation type and an Eastern Hardwood forest, aka Temperate broadleaf and mixed forest ( 26 ) potential vegetation form. The park includes habitats for several rare plants and animals. The park has more than 1,400 species of vascular plants, ranking it 8th in total plant species among all units of
1105-672: Is the sole remnant of the "Central Dunes" where Cowles performed his pioneering field studies of ecological succession and species diversity. The complex is drained by Dunes Creek , which flows to Lake Michigan at the Indiana Dunes State Park swimming beach. A National Park trail runs from Mineral Springs Road into Cowles Bog. The Great Marsh is an interdunal wetland just south of the dune ridge overlooking Lake Michigan. It stretches from steel plants in Burns Harbor , 12 miles (19 km) east to County Line Road on
1170-479: The May apple , buttercups (six varieties), and violets (14 varieties). Summer brings out the orchids (five varieties) and much goldenrod (11 varieties). Invasive plants are those introduced species that dominate a landscape pushing out traditionally native species and others species by their ability to multiply rapidly. There are 54 such species in the dunes. In October 1920, a rare Arctic three-toed woodpecker
1235-692: The National Geographic Society , stated that 890 species had been inventoried. The tally at the close of the 24 hours was 890 species, including 26 amphibians and reptiles, 101 birds, 18 fish, 27 fungi, 11 mammals, 410 plants, and 178 insects. The tally had risen to 1,200 unique species by June 1. Calumet Prairie is a joint venture between the National Park Service and the Indiana Department of Natural Resources. The Calumet Prairie State Nature Preserve in
1300-506: The United States Department of Agriculture , the plant hardiness zone at Indiana Dunes National Park at 614 ft (187 m) is 6a with an average annual extreme minimum temperature of −9.4 °F (−23.0 °C). The primary feature of Indiana Dunes National Park is Lake Michigan . The lake brings with it several weather-related conditions that can create threats to the enjoyment of the area. The Lake Michigan Basin
1365-507: The bald eagle ( Haliaeetus leucocephalus ). Indiana Dunes National Park is host to wide variety of wildlife, including white-tailed deer , red fox , raccoons , opossums , cottontail rabbits , various rodents, Canada geese , gulls , squirrels , hawks , turkey vultures , mallards , great blue herons , songbirds, and garter snakes . Recent records, documented photographically, indicate that North American river otter ( Lontra canadensis ) and bobcat ( Lynx rufus ) began returning to
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#17327727987011430-635: The southeastern United States , especially in the Gulf Coast region. A baygall is a type of swamp found in the forest of the Gulf Coast states in the USA. The world's largest wetlands include significant areas of swamp, such as in the Amazon and Congo River basins. Further north, however, the largest wetlands are bogs . Indiana Dunes Indiana Dunes National Park is a national park of
1495-549: The 1970s in efforts to protect and restore these ecosystems. Often the simplest steps to restoring swamps involve plugging drainage ditches and removing levees . Conservationists work to preserve swamps such as those in northwest Indiana in the United States Midwest that were preserved as part of the Indiana Dunes . Swamps can be found on all continents except Antarctica . The largest swamp in
1560-603: The Ball Brothers and Hemingray Glass Co. plants in Muncie, producing the well-known 'Ball Blue' canning jars and 'Hemingray Blue' insulators. The Hoosier Slide was completely consumed by 1920, and a power plant sits on the site today. In 1926, the Indiana Dunes State Park opened. In the 1950s, a desire to maximize economic development through a "Port of Indiana" spurred interest in preservation. The Save
1625-668: The Dunes Council, including its president Dorothy Richardson Buell and activist Hazel Hannell , began a nationwide campaign to buy the land. Their first success was the purchase of 56 acres (23 ha) in Porter County, the Cowles Tamarack Bog . The Kennedy Compromise entailed the creation of a national lakeshore and a port. Illinois Senator Paul H. Douglas led the Congressional effort to save
1690-580: The Glenwood Shoreline was created, shallow inland bays would be formed with a wide sand spit between each bay and the open lake. Over time, the sand spits would merge with the far shoreline, forming interdunal ponds. Each sand spit would become a dune ridge. As the ponds filled in and wind built the outer sand ridges higher, the ponds would dry up and only a stream would remain, as with the Little Calumet River today, just south of
1755-526: The National Park System. At least two plant species are on the Federal list of Threatened and Endangered Species: Several others are on the list of state T&E species. Populations of each plant group are estimated to be around 100–120 individual plants. The species included are: Among the federally threatened and endangered wildlife are: In addition, the park has habitat suitable for
1820-625: The United States located in northwestern Indiana managed by the National Park Service . It was authorized by Congress in 1966 as the Indiana Dunes National Lakeshore and was redesignated as the nation's 61st national park on February 15, 2019. The park runs for about 20 miles (32 km) along the southern shore of Lake Michigan and covers 15,349 acres (6,212 ha). Along the lakefront,
1885-656: The United States are the forested portions of the Everglades , Okefenokee Swamp , Barley Barber Swamp , Great Cypress Swamp and the Great Dismal Swamp . The Okefenokee is located in extreme southeastern Georgia and extends slightly into northeastern Florida . The Great Cypress Swamp is mostly in Delaware , but extends into Maryland on the Delmarva Peninsula . Point Lookout State Park on
1950-401: The area and some had been using the cemetery for their families as well. However, late in 1866, Rose Howe (granddaughter of Joseph Bailly) had the family plots fenced and requested that those other families remove their deceased to other cemeteries. In 1879, she had the entire cemetery walled in and an iron gate installed to the north. Finally in 1914, Rose Howe took one further step to protect
2015-532: The area in 2011 and 2018, respectively. As of 2023, the Indiana Audubon have observed nearly 370 bird species living in or migrating through the Indiana Dunes. Indiana Dunes has over 369 species of flowering plants. Of these, thirteen are considered threatened or in danger of extinction. Additionally, there four invasive flowering plants on the list. Some of the most common spring flowers include
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2080-442: The beach takes visitors directly past the dune, cresting just slightly lower than the summit itself. On a clear day, there are views of Lake Michigan, Chicago's skyline, and south shore, from this point. Pinhook Bog, a National Natural Landmark , is a geographically isolated unit of the national park. The quaking peat bog is located near U.S. Route 421 approximately 9 miles (14 km) south of Michigan City. The bog formed from
2145-491: The cemetery of her family. She had the area inside the wall filled with sand. Stone steps replaced the gate to a contemplative walk atop the cemetery. An oaken cross was raised atop this new ground, continuing the tradition started by her grandfather. Rose Howe died in 1916, while in California . She was returned to Indiana in 1917 and was the last burial in the family cemetery. The Century of Progress Architectural District
2210-600: The coasts of East Sumatra, Kalimantan (Central, East, South and West Kalimantan provinces), West Papua, Papua New Guinea, Brunei, Peninsular Malaya, Sabah, Sarawak, Southeast Thailand, and the Philippines (Riley et al. ,1996). Indonesia has the largest area of tropical peatland. Of the total 440,000 km (170,000 sq mi) tropical peat swamp, about 210,000 km (81,000 sq mi) are located in Indonesia (Page, 2001; Wahyunto, 2006). The Vasyugan Swamp
2275-500: The communities in the dunes began to develop. They included Chesterton , Porter , Tremont , and the Town of the Pines . These pioneer communities grew and expanded. City West was one of several "ghost towns" situated in the dunes. Planned as a rival to Chicago, it was partly built in 1837 but failed that summer, during a national economic panic . The remains of the town, partly carted off to be used as lumber, were located near where
2340-413: The current shoreline, expanded the existing shoreline. The littoral currents or Longshore drift transport sand southward along the eastern shore of Lake Michigan. As they encounter streams bringing water from inland, sandbars are created, pointing down current, either southward if the shore is north to south or westward along the southern shore itself. If the currents were strong enough, as they were when
2405-463: The dunes habitat. In 1916, the visionary National Parks Director Stephen Mather held hearings in Chicago on a "Sand Dunes National Park". Another factor leading to the desire to preserve the dunes was the disappearance of the Hoosier Slide , a particularly large dune along this shore. The sand from this dune was found to be ideal for glass manufacture, and much of this sand was transported to
2470-463: The dunes to Lake Michigan . Today, the forest covers the dunes and the lake is not visible. Numerous changes have occurred since the first burial in 1827. Joseph Bailly buried his only son by Marie in the fall of 1827 on a sandy knoll. He erected an oak cross on the site and a three-sided shelter. After 1866, the Bailly area was no longer the quiet place that it had been. Other families now lived in
2535-408: The dunes. Few can be clearly identified. Among those species thought to be gone are listed below: Alien or exotic species are plants and animals which are not native to the area. These plants can be classified as Invasive if they rapidly replace other plants and animals in the ecosystem, creating a monoculture and threatening the extinction of the traditional plants and animals. Among plants found in
2600-580: The dunes. In late 1966, the bill passed and the Indiana Dunes National Lakeshore became a reality. Four subsequent expansion bills for the park (1976, 1980, 1986, and 1992) have increased the size of the park to more than 15,000 acres (61 km ). A bill to reclassify Indiana Dunes National Lakeshore as Indiana Dunes National Park was sponsored by Representative Pete Visclosky and Senators Todd Young and Mike Braun and previously by Senator Joe Donnelly , who wanted to bring
2665-496: The eastern area is roughly the lake shore south to U.S. 12 or U.S. 20 between Michigan City, Indiana , on the east and the Cleveland-Cliffs steel plant on the west. This area's conservation scheme is enhanced by the older Indiana Dunes State Park . To the west of the steel plant lies West Beach and a small extension south of the steel mill continues west along Salt Creek to Indiana 249 . The western area
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2730-409: The edge of Michigan City . A century ago, it was the nesting and migratory layover for many birds which depended on its variety of plants. In the late 19th century, the marsh was drained through a series of ditches, creating three watersheds and reducing the water table . As the water levels changed, new plants and trees moved in, creating a new habitat and displacing the wildlife that was dependent on
2795-478: The grove contains 343 native plants and a variety of birds and animals. The unique soil is at least 70 percent silt and clay with some sand . The soil supports a diversity of life. The Hobart Woodland trail is a .05-mile (0.080 km) walk to an overlook on Lake George from the Oak Savannah rail trail . The Oak Savannah rail trail runs from North Hobart Road, Hobart to South Colfax Street, Griffith . Of
2860-446: The northern portion of the land between Interstate 90 to the north and the Little Calumet River on the south. The National Park owns the southern half of this plot. Cowles Bog, a National Natural Landmark , is a wetland complex containing bog , fen , marsh , swamp , wet meadow , and pond habitats; named in honor of biologist and ecologist Henry Chandler Cowles . Located south and west of Dune Acres, Indiana , Cowles Bog
2925-487: The other hand, swamps can (and do) play a beneficial ecological role in the overall functions of the natural environment and provide a variety of resources that many species depend on. Swamps and other wetlands have shown to be a natural form of flood management and defense against flooding. In such circumstances where flooding does occur, swamps absorb and use the excess water within the wetland, preventing it from traveling and flooding surrounding areas. Dense vegetation within
2990-630: The park, owned and maintained by the Indiana Department of Natural Resources as a state nature preserve. Some 574 species of plants have been observed growing in this patch of prairie. Miller Woods is located in Miller Beach , Indiana. It is accessed through the Paul H. Douglas Center for Environmental Education on Lake Street. The area is dominated by ridge and swale topography. the ridges or swells are beach and dune sand. They date from
3055-480: The park, the following are considered to be exotic . Those marked with an '*' are listed as invasive. On May 15 and 16, 2009, the park hosted an All Taxa Biological Diversity survey. In a 24-hour period, as part of the BioBlitz 2,000 students and thousands of additional volunteers surveyed the park for every available living species. John Francis, vice president of research, conservation and exploration for
3120-585: The park. There is little evidence of permanent Native American communities forming during the earlier years; rather, the evidence suggests that seasonal hunting camps were the norm. The earliest evidence for permanent camps was the occupation of the Ohio valley by the Hopewell culture . Five groups of mounds have been documented in the dunes area. These mounds are consistent with the period of 200 BCE ( Goodall Focus ) to 800 CE (early Mississippian ), though even that
3185-425: The pavilion in the state park now stands, until a forest fire in the 1850s destroyed whatever was left. Today, most of the coastline has been settled for use as homes, factories, and businesses, with some areas reserved for public parks. Triggered by a publication on the unique flora of the dunes in the 1899 Botanical Gazette by University of Chicago botanist Henry Chandler Cowles , a movement began to preserve
3250-409: The post Glacial Lake Nipissing period some 3000 years before present. The swales are the depressions between the ridges. They are generally either ponds or marshes. Mnoké Prairie is an active prairie restoration along Beam Street in the central portion of the park. The prairie's name was suggested by Potawatomi elders; "mno" means good, "ké" means earth. It is pronounced "mno-ca" (the second syllable
3315-554: The pre-existing wetlands. Beginning in 1998, the national lakeshore began restoration of the marsh by closing Derby Ditch and restoring 500 acres (200 ha). The work consists of: The heron rookery is located along the East Arm Little Calumet River in the northeast corner of Porter County . The rookery is physically separated from the main part of the park. It is accessible from County Road 600 East, south of County Road 1400 North. The rookery
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#17327727987013380-608: The recessional moraines. Four major glacial lake periods created the Indiana Dunes. They are the glacial Lake Chicago (14,000 YBP), glacial Lake Algonquin (9,000 YBP), glacial Lake Chippewa (7,000 YBP), and the Nipissing Great Lakes stage (4,000 YBP). Once the glaciers had fully retreated from the Lake Michigan basin, after the Lake Nipissing stage, the same factors that created the dunes south of
3445-672: The site more recognition. Deputy Director of the National Park Service Paul Daniel Smith testified that the Service opposed the redesignation because it would be inconsistent with the Service's naming conventions and the Indiana Dunes have more in common with other national lakeshores and seashores than national parks , which are typically much larger. H.R. 1488 originally passed in the House of Representatives on November 1, 2017, but it did not receive
3510-532: The southern tip of Maryland contains many swamps and marshes. The Great Dismal Swamp lies in extreme southeastern Virginia and extreme northeastern North Carolina . Both are National Wildlife Refuges . Another swamp area, Reelfoot Lake of extreme western Tennessee and Kentucky , was created by the 1811–12 New Madrid earthquakes . Caddo Lake , the Great Dismal and Reelfoot are swamps centered at large lakes. Swamps are often associated with bayous in
3575-493: The state and national parks. As the shoreline moved northward, new ridges formed along with additional streams, now slower and less powerful, and the process duplicated itself. To the west of the Indiana Dunes, Wolf Lake in Hammond, Indiana , forms a western border to the dunes. Here the same process is at work, only the littoral drift is again south, but along the western shore, pushing the sand and sand spits eastward. Today, it
3640-618: The swamp also provides soil stability to the land, holding soils and sediment in place whilst preventing erosion and land loss. Swamps are an abundant and valuable source of fresh water and oxygen for all life, and they are often breeding grounds for a wide variety of species. Floodplain swamps are an important resource in the production and distribution of fish. Two thirds of global fish and shellfish are commercially harvested and dependent on wetlands. Historically, humans have been known to drain and/or fill swamps and other wetlands in order to create more space for human development and to reduce
3705-447: The swamp, purifying the water. Any remaining or excess chemicals present will accumulate at the bottom of the swamp, being removed from the water and buried within the sediment. The biogeochemical environment of a swamp is dependent on its hydrology, affecting the levels and availability of resources like oxygen, nutrients, water pH and toxicity, which will influence the whole ecosystem. Swamps and other wetlands have traditionally held
3770-525: The threat of diseases borne by swamp insects. Wetlands are removed and replaced with land that is then used for things like agriculture, real estate, and recreational uses. Many swamps have also undergone intensive logging and farming, requiring the construction of drainage ditches and canals. These ditches and canals contributed to drainage and, along the coast, allowed salt water to intrude, converting swamps to marsh or even to open water. Large areas of swamp were therefore lost or degraded. Louisiana provides
3835-491: The trails 9-mile (14 km) length, 2 miles (3.2 km) are through the Hobart Prairie Grove. The trail follows the old Elgin, Joliet and Eastern Railroad route and connects with the Prairie Duneland rail trail , continuing east to Chesterton . Hoosier Prairie, a National Natural Landmark , is a 430-acre (170 ha) tallgrass prairie adjacent to Griffith, Indiana . It is a geographically isolated unit of
3900-534: The two younger recessional moraines of the Tinley Moraine and the Lake Border Moraine . Each moraine created a dam across the southern outflow of the melt waters of the receding glaciers. As each glacial lake breached a low spot in the moraines, water levels receded, leaving a series of shorelines and dune ridges. The Calumet Shoreline is the oldest visible shoreline of Lake Michigan. It
3965-907: The world is the Amazon River floodplain, which is particularly significant for its large number of fish and tree species. The Sudd and the Okavango Delta are Africa's best known marshland areas. The Bangweulu Floodplains make up Africa's largest swamp. The Mesopotamian Marshes is a large swamp and river system in southern Iraq , traditionally inhabited in part by the Marsh Arabs . In Asia, tropical peat swamps are located in mainland East Asia and Southeast Asia. In Southeast Asia, peatlands are mainly found in low altitude coastal and sub-coastal areas and extend inland for distance more than 100 km (62 mi) along river valleys and across watersheds. They are mostly to be found on
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#17327727987014030-431: Was a short lived permanency. Beginning in the 1500s, European exploration and trade introduced more changes to the human environment. Tribal animosities and traditional European competition affected tribal relations . Entire populations began moving westward, while others sought to dominate large geographic trading areas. Once again, the dunes became a middle point on a journey from the east or the west. It continued to remain
4095-437: Was captured a mile west of Dune Park Station. Later that month another male was captured east of Dune Park Station. One was busy digging out grubs and the other was nervously flying from tree to tree. In May 1919, a clay-colored sparrow was found near Dune Park. It was a part of a larger flock of Harris's sparrow migrating along the western shore of Lake Michigan. Several species of plants and animals have disappeared from
4160-484: Was designated a U.S. National Historic Landmark in 1962. The real estate became the home of the Chellberg family, who built a farm on its sandy soil. As of 2008 , the park maintains a heritage farm on the Chellberg land, with the Bailly family cemetery on the northern edge of the property. The Bailly Cemetery is located half a mile north of the homestead. Its location is a sandy bluff, which once looked out across
4225-553: Was formed during the Wisconsin Glacial Period . The Michigan Lobe of the continental glacier began its retreat northward over 20,000 years before present (YBP) forming the southern shore of the Lake Michigan Basin. The Valparaiso Moraine is the dominant geologic form that created the various landscape forms of the Indiana Dunes about 40,000 YBP. Within the arc created by the Valparaiso Moraine are
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