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The Cambrian in Pennsylvania, US

Cambrian in Pennsylvania map

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Cambrian Fossils
Fossil photos from Cambrian in Pennsylvania

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Paleontology and geology

During the Cambrian, Pennsylvania lay much closer to the equator than it does today. A shallow sea rose to cover the state, and sediments eroding off the land formed a sandy sea floor inhabited by trilobites, brachiopods, and other marine organisms. Limy sediments accumulated father offshore. Cambrian rocks containing stromatolites typical of a shallow-water environment can be found in Valley Forge National Historical Park west of Philadelphia. Simple, tube-shaped, vertical trace fossils called Skolithos can be found in York County in central Pennsylvania. Although not shown on this map, there are extensive exposures of Cambrian rocks in southeastern and south-central Pennsylvania.

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Research and Collections

Research and Collections

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Carnegie Museum: Invertebrate Paleontology Section: The Carnegie Museum of Natural History Section of Invertebrate Paleontology has more than 100 years of research, field work, educational outreach (PALS), and exhibits on Phanerozoic life. Our collections number more than three-quarters of a million specimens with some 11,000 type and figured specimens published in more than 300 professional publications. Our type and collection strengths are concentrated in the Lower and Upper Paleozoic rocks of the Appalachians, mid-continent, and western Interior Seaway. 

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