Search results
Results From The WOW.Com Content Network
Fossils are common from the Ordovician through the Pennsylvanian. Illinois has a reputation for rocks bearing large numbers of trilobite fossils, often of very high preservational quality. [1] There is a gap in Illinois' geologic record from the Mesozoic to the Pleistocene. During the Ice Age, Illinois was subject to glacial activity.
Illinois Beach Nature Preserve: 1980: Lake: State The site is a part of Illinois Beach State Park, and contains a wide range of savanna, prairie, wetland and beach ecosystems, as well as numerous endangered species. LaRue-Pine Hills Ecological Area: 1974
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]
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.
For premium support please call: 800-290-4726 more ways to reach us
Map all coordinates using OpenStreetMap. Download coordinates as: KML; ... Pages in category "Beaches of Illinois" The following 5 pages are in this category, out of ...
This is a list of archaeological sites on the National Register of Historic Places in Illinois. Historic sites in the United States qualify to be listed on the National Register of Historic Places by passing one or more of four different criteria; Criterion D permits the inclusion of proven and potential archaeological sites . [ 1 ]
The Mazon Creek fossil beds are a conservation lagerstätte found near Morris, in Grundy County, Illinois. The fossils are preserved in ironstone concretions , formed approximately 309 million years ago in the mid- Pennsylvanian epoch of the Carboniferous period.