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contain fishes and amphibians similar to those in the Zechstein of the German Dyas, and correlate with the Magnesian Limestone, which in Great Britain overlies the Carboniferous coal measures. MURCHISON realized that the stratigraphic interval above the Carboniferous and below the Triassic must be more significant than suggested by the poorly fossiliferous reddish sandstone, shale, and dolostone of western Europe and that the Russian faunas and stratigraphic succession of the Perm region fitted into
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Ross et al. (1979) studied this question.
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