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Early in the ensuing 20th century a Silurian age fossil reef system was discovered in the state. In the 1950s Francis Tully discovered the "monster" that would later be named in his honor. The Pennsylvanian species Tullimonstrum gregarium ("Tully Monster") is the Illinois state fossil. It is one of the few officially designated state fossils ...
Expert fossil preparator Bob Masek first discovered the specimen in the 1980s in the fossil deposits preserved at Illinois’ Mazon Creek Lagerstätte. (The German word is a term paleontologists ...
Lake Renwick Preserve: Plainfield: Will: Chicago area: Operated by the Forest Preserve District of Will County, 320 acre site and 200 acre lake where great blue herons, great egrets, black-crowned night herons, double-crested cormorants, and cattle egrets nest together, features Lake Renwick Heron Rookery Visitor Center with birding programs
The objectives of the IOS are to promote scientific research and education in order to improve knowledge and awareness of birds in Illinois, publish a journal and keep a permanent historical record of its bird life, maintain an up-to-date state checklist, and support the well-being of birds and birding in the state. [2]
The Mazon Creek fossils are found in the Upper Carboniferous Francis Creek Shale. [6] 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.
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Fossil Prairie Park: Devonian: North America: US: Iowa: Mazon Creek: Francis Creek Shale: Carboniferous (Pennsylvanian) North America: US: Illinois [Note 1] Ghost Ranch: Triassic: North America: US: New Mexico: Non-Avian Dinosaurs [Note 1] Hagerman Fossil Beds National Monument: Glenns Ferry Formation: Pliocene/Pleistocene: North America: US: Idaho
The fossil examined in the study, collected during a 2011 expedition by the Antarctic Peninsula Paleontology Project, was found encased in rock that dated back 68.4 to 69.2 million years and ...