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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.
Illinois was covered by a sea during the Paleozoic. Over time this sea would be inhabited by animals like brachiopods, clams, corals, crinoids, snails, sponges, trilobites. [3] 500 million years ago, during the Cambrian, the seas of Illinois resembled those of the modern Bahamas. [4] At the time, Illinois was located near the equator. [5]
This is a list of all spacecraft landings on other planets and bodies in the Solar System, including soft landings and both intended and unintended hard impacts.The list includes orbiters that were intentionally crashed, but not orbiters which later crashed in an unplanned manner due to orbital decay.
Bodies of water of Illinois (5 C) ... Pages in category "Landforms of Illinois" The following 13 pages are in this category, out of 13 total.
The Carrier Mills Archaeological District is a group of prehistoric archaeological sites located along the Saline River south of Carrier Mills, Illinois.The sites were inhabited over the period from 2500 B.C. to 700 A.D.
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Bodies of water of Cook County, Illinois (2 C, 3 P) Bodies of water of Crawford County, Illinois (1 C) Bodies of water of Cumberland County, Illinois (1 C, 1 P)
In a paper announcing 2024 PT5’s discovery, Marcos and his brother and co-author Raul de la Fuente Marcos wrote that Earth’s gravitational pull can regularly capture asteroids from the Near ...