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Abstract
Classification of the two types of Old Red Sandstone. Upper Old Red Sandstone. Middle Old Red Sandstone. Lower Old Red Sandstone. Marine or Devonian type. Upper Devonian rocks. Middle Devonian rocks. Lower Bevonian rocks. Devonian of Russia. Devonian strata in the United States and Canada. Devonian insects of Canada.
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Classification of the two types of Old Red Sandstone. Upper Old Red Sandstone. Middle Old Red Sandstone. Lower Old Red Sandstone. Marine or Devonian type. Upper Devonian rocks. Middle Devonian rocks. Lower Bevonian rocks. Devonian of Russia. Devonian strata in the United States and Canada. Devonian insects of Canada.
Key concepts: Devonian, Red sandstone, Geology, Red beds, Paleontology, Group (periodic table), Late Devonian extinction, Carboniferous