Abstract

Clastic sediments from the Precambrian shield were furnished to shelf areas in the Cincinnati Arch province throughout many erosional cycles. Eolian activity on a broad scale made pre-Chazyan erosion, deposition, and sedimentation much more rapid th than at any subsequent time, and carried igneous and metamorphic material into a marine environment, supplying minerals for dolomitization, cementation, and formation of chert and glauconite. Cambrian deposition was transgressively northwestward due to submergence of the eastern boundary of the shield. The interval between the end of Grenville deposition and beginning of Cambrian deposition is equivalent to a geologic era; the name Lipozoic Era is proposed.--G.D.C

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