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PAL Paleontology & Palynology --- Canada --- Devonian --- North America --- Paleontology & Palynology --- Upper Silurian --- fossils
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PAL Paleontology & Palynology --- Canada --- Lower Carboniferous --- Millstone Grit --- North America --- Paleontology & Palynology
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Geology --- Geology, Stratigraphic --- Geology, Stratigraphic. --- Geology. --- Ordovician Geologic Period. --- From 425 to 500 million years ago. --- New York (State)
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