The Silurian in Pennsylvania, US |
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Paleontology and geologyAfter a period of uplift and mountain building (the Taconic Orogeny) during the Ordovician, erosion and subsidence of the edge of the North American continent brought the return of a shallow sea to much of Pennsylvania. Colonial tabulate corals flourished on the limy sea floor, as did bryozoans, brachiopods, and tiny ostracodes. |
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