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The EPA ecoregion classification system has four levels, but only Levels I, III, and IV are shown on this list. Level I divides North America into 15 broad ecoregions (or biomes ). Illinois is almost entirely within the Eastern Temperate Forest environment Level I region, although very small sections in its extreme west are in the Great Plains ...
The Illinois River (Miami-Illinois: Inoka Siipiiwi [4]) is a principal tributary of the Mississippi River at approximately 273 miles (439 km) in length. Located in the U.S. state of Illinois , [ 5 ] the river has a drainage basin of 28,756.6 square miles (74,479 km 2 ). [ 6 ]
The Illinois Waterway system consists of 336 miles (541 km) of navigable water from the mouth of the Calumet River at Chicago to the mouth of the Illinois River at Grafton, Illinois. Based primarily on the Illinois River , it is a system of rivers, lakes, and canals that provide a commercial shipping connection from the Great Lakes to the Gulf ...
Most navigable rivers and canals in the United States are in the eastern half of the country, where the terrain is flatter and the climate is wetter. The Mississippi River System is connected to the Illinois Waterway, which continues to the Great Lakes Waterway and then to the Saint Lawrence Seaway.
Meredosia Lake is a riparian lake that forms part of the valley of the Illinois River.It is located in Cass and Morgan Counties, Illinois.Much of the floodplain isthmus between Lake Meredosia and the river is known as Meredosia Island, and much of the quasi-island and associated lakebed are part of the Meredosia National Wildlife Refuge.
A wide variety of river and stream channel types exist in limnology, the study of inland waters.All these can be divided into two groups by using the water-flow gradient as either low gradient channels for streams or rivers with less than two percent (2%) flow gradient, or high gradient channels for those with greater than a 2% gradient.
The Mazon River or Mazon Creek (/ m ə ˈ z ɒ n /), is a tributary of the Illinois River in the United States. The confluence is near Morris, Illinois. [2]The Mazon River is associated with the Mazon Creek fossils of the Francis Creek Shale, which are also exposed in strip mines and quarries near the River.
The type locality is the Mazon River (or Mazon Creek), a tributary of the Illinois River near Morris, Grundy County, Illinois. The 25 to 30 meters of shale were formed approximately , during the Pennsylvanian period. The fossiliferous concretions are usually found within the thickest deposits of the Francis Creek Shale.