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It existed as a positive topographic area during late Ordovician through the Devonian period which stretched from northern Alabama northeastward to the southeastern tip of Ontario. Fossils from the Ordovician are commonplace in the geologic formations which make up the Cincinnati Arch and are commonly studied along man made roadcuts.
Many significant fossils curated by museums in Europe and the United States were found in Ohio. [1] Major local fossil discoveries include the 1965 discovery of more than 50,000 Devonian fish fossils in Cuyahoga County. The Ordovician trilobite Isotelus maximus is the Ohio state invertebrate fossil.
Fossil of the Ordovician-Silurian tabulate coral Catenipora †Catenipora †Catenipora favositomima †Catenipora favositomina †Catenipora gotlandica †Caulopteris †Caulopteris antiqua †Caulopteris peregrina †Cayugaea †Cayugaea intermittens †Cayugaea transitorius – tentative report †Centroceras †Centrorhynchus (= Sartenaerus ...
Restoration of the Middle Ordovician-Silurian nautiloid cephalopod Cameroceras feeding on an Aphetoceras, while a quartet of Cyclostomiceras swim by †Cameroceras †Catenipora †Centroceras †Ceratocephala †Ceratopsis †Ceraurinus †Ceraurus †Chagrinia †Charactoceras †Chasmatopora †Chasmops †Chaunograptus †Chondrites †Chonetes
The Point Pleasant Formation is the oldest rock unit exposed at the surface in Ohio and formed during the Late Ordovician, outcropping along the Ohio River near Cincinnati. The formation records a transition from shallow-water limestone reef formation to a deeper water environment, marked by overlying shale and limestone, which form the ...
The Cincinnati Arch, where Maysville can be found, was located about 23 degrees south of the equator. Roadcuts such as Maysville roadcut have attracted those interested in collecting fossils, ranging from professionals at universities to amateurs in the area. Part of Maysville fossil collecting is fossil identification.
Fossil from the McMillan Formation (Ohio) The McMillan Formation is a geologic formation in Ohio , Kentucky and Indiana . It preserves fossils dating back to the Ordovician period .
Stratigraphic range: Late Ordovician: Brachiopod-rich Cincinnatian limestone ... The Cincinnati Group is a geologic group in Kentucky, Ohio and Indiana.