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J. Keith Rigby
Early Cambrian sponges from Vermont and Pennsylvania, the only ones described from North America
Journal of Paleontology (May 1987), 61(3):451-461
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GeoRef, Copyright 2004, American Geological Institute.
Appalachians; biologic evolution; Cambrian; Demospongea; East Petersburg; faunal studies; Franklin County Vermont; Georgia Center; Getz Quarry; Hazelia walcotti; Hexactinellida; Hyalospongea; Invertebrata; Kinzers Formation; Lancaster County Pennsylvania; Lancaster Quadrangle; Leptomitus minor; Leptomitus zitteli; Lower Cambrian; Monoxonida; North America; northwestern Vermont; paleontology; Paleozoic; Parker Slate; Parker's Quarry; Pennsylvania; Piedmont; Porifera; problematic fossils; Protospongia hicksi; Reticulosa; revision; Roberstown; southeastern Pennsylvania; United States; Vermont
N33°00'00" -
N47°30'00" and
W87°00'00" -
W67°00'00" (Search for maps and images at Alexandria Digital Library)
N44°38'00" -
N45°01'00" and
W73°15'00" -
W72°32'00" (Search for maps and images at Alexandria Digital Library)
N39°43'00" -
N40°18'00" and
W76°43'00" -
W75°53'00" (Search for maps and images at Alexandria Digital Library)
Copyright © 1987 by the GeoScienceWorld.
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