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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]
This fossil dates between 5.3 and 14 million years ago to the Miocene epoch of the Neogene period. It was discovered in the Linxia Basin of Gansu Province, China and measures 20 × 9 × 6 cm in size.
Geologic formations of the Neogene Period, in Cenozoic Era United States, North America. See also the preceding Category:Paleogene United States and the succeeding Category:Quaternary United States Subcategories
It follows the Neogene Period and spans from 2.58 million years ago to the present. [4] The Quaternary Period is divided into two epochs: the Pleistocene (2.58 million years ago to 11.7 thousand years ago) and the Holocene (11.7 thousand years ago to today); a proposed third epoch, the Anthropocene , was rejected in 2024 by IUGS , the governing ...
The Neogene (/ ˈ n iː. ə dʒ iː n / NEE-ə-jeen, [6] [7]) is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period 23.04 million years ago to the beginning of the present Quaternary Period 2.58 million years ago.
The Mammal Neogene zones or MN zones are system of biostratigraphic zones in the stratigraphic record used to correlate mammal-bearing fossil localities of the Neogene period of Europe. It consists of seventeen consecutive zones (numbered MN 1 through MN 18; MN 7 and 8 have been joined into MN 7/8 zone) defined through reference faunas, well ...
New Athens sits on the Kaskaskia River and was originally called Athens. The village was laid out in 1836 and incorporated in 1866. The name change to New Athens came in 1868 after it was discovered there was already an Athens in another part of the state. The area is known for the water sports recreation, including annual fishing derby.
Biological taxa that went extinct during the Neogene period of geologic time, between 23.03 and 2.58 million years ago during the middle Cenozoic Era See also the preceding Category:Paleogene extinctions and the succeeding Category:Quaternary extinctions
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