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- W2473526925 abstract "Stratigraphic and paleontologic studies of the Pottsville and Allegheny groups of western Pennsylvania have resulted in the establishment of twelve, envi- ronmental, faunal zones some of which have proved useful in regional correlation and paleogeographic interpretations. Marine and restricted marine fossils, mainly Chonetes, Mesolobus, Marginifera, Lingula, Dunbarella and Aviculopecten occur in dark-gray shales above the Upper Mercer, Lower Clarion, Upper Clarion, Scrubgrass, Lower and Middle Kittanning coals. Fresh water fossils, mainly estherids and Carbonicola are found in shales above the Upper Kittanning, and Lower and Upper Freeport coals, and ostracods and small gastropods are found in the limestones below these coals. The most rapid faunal variation in all marine beds takes place in a general north- south direction. The marine fossils disappear to the north and east in the Upper Mercer and Lower Clarion shales, whereas they disappear to the northwest and southeast in the other beds." @default.
- W2473526925 created "2016-07-22" @default.
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- W2473526925 date "1960-01-01" @default.
- W2473526925 modified "2023-09-23" @default.
- W2473526925 title "MARINE AND FRESH WATER FOSSILIFEROUS BEDS IN THE POTTSVILLE AND ALLEGHENY GROUPS OF" @default.
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- W2473526925 hasPublicationYear "1960" @default.
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