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Upper Carboniferous
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Example Sentences
Formerly clay-ironstone was raised from the Upper Carboniferous strata.
From Project Gutenberg
Small forms from the Upper Carboniferous and Permian formations.
From Project Gutenberg
“Demetian” was the corresponding designation proposed by Woodward for the Upper Carboniferous rocks.
From Project Gutenberg
Folded amongst the schists are Strips of Upper Carboniferous beds similar to those of the west coast.
From Project Gutenberg
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