Search results
Results from the WOW.Com Content Network
Paleogeographic reconstruction showing the Illinois Basin area during the Middle Devonian period. [9] Almost all Silurian rocks in Illinois are deep-water limestone and dolomite deposits; reef habitats were common, and fossils of reef organisms are locally highly abundant, including corals, brachiopods, crinoids, stromatoporoids, and bryozoans. [6]
In the 1930s, the State of Illinois appropriated $300,000 which was supplemented by a $245,454 Public Works Administration grant for a new building to house Illinois State Geological Survey and Illinois Natural History Survey operations. [28] The Natural Resources Building, located on Peabody Drive in Champaign, was dedicated on November 15, 1940.
The Illinois Basin is a Paleozoic depositional and structural basin in the United States, centered in and underlying most of the state of Illinois, and extending into southwestern Indiana and western Kentucky. The basin is elongate, extending approximately 400 miles (640 km) northwest-southeast, and 200 miles (320 km) southwest-northeast.
An assessment from the Illinois Geological Survey noted the vulnerability of the aquifer, warning that carbon capture activities would need to be closely monitored to prevent environmental damage.
Concern about additional groundwater withdrawal and the resulting repercussions has encouraged planning, management, and groundwater studies. The Illinois State Geological Survey and the Illinois State Water Survey have collected data that indicate declining water levels in certain parts of the Mahomet Aquifer. [citation needed]
The Pope Mega Group is a geologic unit found in the Illinois Basin of southern Illinois, southwestern Indiana, and western Kentucky. [1] [2] In Indiana and Kentucky its equitant is the Buffalo Wallow Group. This unit grades from sandstones at its base into mix of limestones and sandstone and then a shale at its top. [3]
The Illinoian Stage is the name used by Quaternary geologists in North America to designate the Penultimate Glacial Period c.191,000 to c.130,000 years ago, during the late Middle Pleistocene (Chibanian), when sediments comprising the Illinoian Glacial Lobe were deposited.
Nearly the entire western boundary of Illinois is the Mississippi River, except for a few areas where the river has changed course. Illinois' southeastern and southern boundary is along the Wabash River and the Ohio River, whereas its northern boundary and much of its eastern boundary are straight survey (longitudinal and latitudinal) lines ...