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Peedee Formation
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<p>The Peedee Formation is a <a href="/facts/Formation_(geology)/mMhpw4G2">geologic formation</a> in <a href="/facts/North_Carolina/VhKNTULI">North</a> and <a href="/facts/South_Carolina/lQQX84IS">South Carolina</a>. A marine deposit representing an inner <a href="/facts/Neritic_zone/7SW3Ekar">neritic</a> environment, named for exposures along the Great <a href="/facts/Peedee_River/AA4Mf1w2">Peedee River</a>, it preserves invertebrate (primarily <a href="/facts/Belemnitida/oa3ao10B">belemnites</a>, <a href="/facts/Echinoderm/j2rd8qwt">echinoderms</a> and <a href="/facts/Foraminifera/8Yo9cPTI">foraminifera</a>) and vertebrate (primarily <a href="/facts/Shark/rh5Cotvx">shark</a> teeth, with some marine reptile remains) <a href="/facts/Fossils/by7NzIA1">fossils</a> dating to the <a href="/facts/Late_Cretaceous/pcHa4fBg">Late Cretaceous</a> (<a href="/facts/Maastrichtian/xRBafamu">Maastrichtian</a>). </p><p>The formation is notable for its occurrence of <i><a href="/facts/Belemnitella_americana/2hA8UenB">Belemnitella americana</a></i>, known as the Pee Dee Belemnite (PDB), a long-standing standard in <a href="/facts/Delta13c/mMh14cU1">stable carbon isotope</a> research. A single <a href="/facts/Pterosaur/YNQwa1ru">pterosaur</a> <a href="/facts/Femur/uVyTwj4l">femur</a>, possibly an <a href="/facts/Azhdarchidae/km8IDnS4">Azhdarchid</a>, from the Peedee formation is one of the few pterosaur body fossils found in <a href="/facts/Appalachia_(landmass)/vY0GrWC2">Eastern North America</a>. </p><p>The stratigraphy of the formation spans from the early Maastrichtian (in South Carolina) to the late Maastrichtian shortly before the <a href="/facts/Cretaceous%E2%80%93Paleogene_extinction_event/HNyDuEcx">Cretaceous-Paleogene extinction event</a>. The formation is divided into several members, including the early-mid Maastrichtian Rocky Point Member and the late Maastrichtian Island Creek Member. Based on its fauna, it appears to be roughly concurrent with the <a href="/facts/Navesink_Formation/DaPSDYTw">Navesink Formation</a> from <a href="/facts/New_Jersey/pI5k19S7">New Jersey</a>. </p>