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Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees, as the dominant vegetation type. Temperate grassland regions include the Pampas of Argentina, Brazil and Uruguay, and the steppe of Ukraine, Russia and Kazakhstan. Lands typically referred to as "prairie" tend to be in North America. The term encompasses the area referred to as the Interior Lowlands of Canada, the United States, and Mexico, which includes all of the Great Plains as well as the wetter, hillier land to the east.
Lake Agassiz was a very large glacial lake in central North America. Fed by glacial meltwater at the end of the last glacial period, its area was larger than all of the modern Great Lakes combined though its mean depth was not as great as that of many major lakes today.
A drainage basin is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water. The drainage basin includes all the surface water from rain runoff, snowmelt, hail, sleet and nearby streams that run downslope towards the shared outlet, as well as the groundwater underneath the earth's surface. Drainage basins connect into other drainage basins at lower elevations in a hierarchical pattern, with smaller sub-drainage basins, which in turn drain into another common outlet.
A moraine-dammed lake occurs when the terminal moraine has prevented some meltwater from leaving the valley. Its most common shape is that of a long ribbon. Example of moraine dammed lakes include:
Lake Pleasant is a lake located in the Adirondack Park in New York in the United States. The lake is in the town of Lake Pleasant in Hamilton County.
The Winnipesaukee River is a 10.5-mile-long (16.9 km) river that connects Lake Winnipesaukee with the Pemigewasset and Merrimack rivers in Franklin, New Hampshire. The river is in the Lakes Region of central New Hampshire. The river's drainage area is approximately 488 square miles (1,264 km2).
Lake Algonquin was a prehistoric proglacial lake that existed in east-central North America at the time of the last ice age. Parts of the former lake are now Lake Huron, Georgian Bay, Lake Superior, Lake Michigan, and Lake Nipissing.
Snåsavatnet is Norway's sixth-largest lake. The 122-square-kilometre (47 sq mi) lake is located in the municipalities of Steinkjer and Snåsa in Trøndelag county, Norway. The villages of Følling and Sunnan lie at the southwestern end of the lake and the village of Snåsa lies at the northeastern end of the lake. European route E6 runs along the northern shore of the lake and the Nordland Line runs along the southern shore.
Lake Duluth was a proglacial lake that formed in the Lake Superior drainage basin as the Laurentide Ice Sheet retreated. The oldest existing shorelines were formed after retreat from the Greatlakean advance, sometime around 11,000 years B.P. Lake Duluth formed at the western end of the Lake Superior basin. Lake Duluth overflowed south through outlets in Minnesota and Wisconsin at an elevation of around 331 m above sea level.
The North Branch of the Contoocook River is a 17.9-mile-long (28.8 km) river located in southwestern New Hampshire in the United States. It is a tributary of the Contoocook River, part of the Merrimack River watershed.
The Warner River is a 20.3-mile-long (32.7 km) river located in central New Hampshire in the United States. It is a tributary of the Contoocook River, part of the Merrimack River watershed.
The Blackwater River is a 37.5-mile-long (60.4 km) river located in central New Hampshire in the United States. It is a tributary of the Contoocook River, part of the Merrimack River watershed.
The North Branch of the Millers River is a river in southwestern New Hampshire and northern Massachusetts in the United States. It is a tributary of the Millers River, which flows west to the Connecticut River, which in turn flows south to Long Island Sound, an arm of the Atlantic Ocean.
The Squam River is a 3.6-mile-long (5.8 km) river located in central New Hampshire in the United States. The river is the outlet of Squam Lake, the second-largest lake in New Hampshire, and it is a tributary of the Pemigewasset River, which itself is a tributary of the Merrimack River.
The Presumpscot River is a 25.8-mile-long (41.5 km) river located in Cumberland County, Maine. It is the main outlet of Sebago Lake. The river provided an early transportation corridor with reliable water power for industrial development of the city of Westbrook and the village of South Windham.
The Bear River is a 2.7-mile-long (4.3 km) tributary of Long Lake in the U.S. state of Maine. It originates at the outlet of Bear Pond in the town of Waterford in Oxford County, then flows southeast into the town of Bridgton in Cumberland County and finally the town of Harrison, where it reaches Long Lake. Via Long Lake, the Songo River, and Sebago Lake, the Bear River is part of the Presumpscot River watershed, flowing to Casco Bay on the Atlantic Ocean.
The Crooked River is a 58.0-mile-long (93.3 km) tributary of the Songo River in Maine. It is the longest of the tributaries of Sebago Lake, the outlet of which is the Presumpscot River, flowing to Casco Bay on the Atlantic Ocean.
Storavatnet is a lake just southwest of the village of Loddefjord in the city of Bergen in Vestland county, Norway. The 2.2-kilometre (1.4 mi) long lake is located in the borough of Laksevåg, west of the city center of Bergen.
Lake San Cristobal is a lake in the U.S. state of Colorado. Located in the San Juan Mountains at an elevation of 9,003 feet (2,744 m), the freshwater lake is 2.1 miles (3.4 km) long, up to 89 feet (27 m) deep, has a surface area of 0.52 square miles (1.3 km2), and holds about 11,000 acre feet (14,000,000 m3) of water. The town of Lake City, a few miles to the north, is named after Lake San Cristobal. The name San Cristóbal means Saint Christopher in the Spanish language. Many old silver mines are near the lake and it is very clean and well kept, and stocked with Rainbow Trout.
During the Vashon Glaciation a series of lakes formed along the southern margin of the Cordilleran Ice Cap. In the Hood Canal depression, two significant lake stages existed, Lake Skokomish and Lake Hood. Early Lake Skokomish’s surface was at 350 ft (110 m) above sea level, draining across the divide at Shelton, Washington into early Glacial Lake Russell. As the glacier receded northward, this freshwater lake grew in size, until the ice was north of the Clifton channel. With the opening of the Clifton channel, the water dropped to 160 m (520 ft) above sea level. This longer and lower level lake is referred to as Lake Hood. The glacier continued to recede northward until it reached the Poulsbo channel. Here, the water level equalized to Glacial Lake Russell nolonger having a separate identify.
References
- ↑ "Long Lake Outlet". Geographic Names Information System . United States Geological Survey . Retrieved 2017-10-04.