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all geography including DSDP/ODP Sites and Legs
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paleontology (1)
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Carboniferous
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Mississippian
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Ordovician
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Lower Ordovician
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stratigraphy (1)
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United States
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Maryland
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Journal Article
A New Member of the Madison Limestone (Mississippian) in Wyoming
Publisher: Geological Society of America
Published: 01 December 1968
GSA Bulletin (1968) 79 (12): 1855–1858.
Journal Article
LOWER ORDOVICIAN SECTION NEAR CHAMBERSBURG, PENNSYLVANIA
Publisher: Geological Society of America
Published: 01 July 1958
GSA Bulletin (1958) 69 (7): 837–854.
Journal Article
NOMENCLATURE OF LOWER ORDOVICIAN ROCKS OF WASHINGTON COUNTY, MARYLAND
Publisher: Geological Society of America
Published: 01 July 1956
GSA Bulletin (1956) 67 (7): 935–938.