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In extreme northwestern Illinois the Driftless Zone, a region of unglaciated and therefore higher and more rugged topography, occupies a small part of the state. Charles Mound , located in this region, is the state's highest elevation above sea level .
The state averages from 30–40 inches (76–102 centimetres) of precipitation annually. Snow cover tends to be intermittent in the southern part of the state, but persistent in northern Lower Michigan and especially in the Upper Peninsula. Michigan USDA Plant Hardiness Zone Map. The entire state averages 30 days of thunderstorm activity per year.
Enlargeable U.S. map with state and territory high points shown as red dots and low points as green squares except where low point is a shoreline. Enlargeable map of the 50 U.S. states by mean elevation. This list includes the topographic elevations of each of the 50 U.S. states, the District of Columbia, and the U.S. territories. [1]
A composite of three maps (Leverett 1915) (Leverett 1902) (Larsen 1986) and other sources. Colors represent moraines from the same time period of the Wisconsin Glacial epoch The Valparaiso Moraine formed as the first major moraine of the Cary substage of the Wisconsin Glacial period (10,000-50,000 years before present). [ 2 ]
In Illinois: the Apple River and the Galena River (a.k.a. the Fever River) Although lying just to the north of the Driftless Area, the Saint Croix in Wisconsin and Minnesota is another important river that affected the area, as it was the outlet for Glacial Lake Duluth , forerunner to Lake Superior , when the eastern outlet was blocked by the ...
Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, [1] with primarily a humid continental climate.
These basins, termed the Illinois Basin and Michigan Basin, allowed for extensive deposition of sedimentary rock during the Palaeozoic Era. [2] The Illinois Basin is a northwest–southeast asymmetrical structural basin that is filled with more than 4000 meters of Paleozoic sedimentary rocks. The basin covers most of Illinois, and extends into ...
Illinois lies between Lake Michigan and the Mississippi River and the Ohio River in the Midwestern United States. Chicago, Illinois, is the third most populous city and the third most populous metropolitan area of the United States. The United States created the Illinois Territory on March 1, 1809.