Many distinguishing features of the surface may often be ascribed to the operation at a remote era of slow and tranquil causes-to the gradual deposition of sediment in a lake or in the ocean, or to the prolific increase of testacea and corals therein. (Charles Lyell)

Many distinguishing features of the surface may often be ascribed to the operation at a remote era of slow and tranquil causes-to the gradual deposition of sediment in a lake or in the ocean, or to the prolific increase of testacea and corals therein.

Charles Lyell

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deposition distinguishing era gradual increase lake ocean operation remote sediment slow surface testacea

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