What is the Cincinnati Arch?

1 Answer

  • 4 weeks ago
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    It is a thinning of the sedimentary cover because of a basement rock high, a "ridge" of sorts in the bedrock below the sedimentary rocks that were deposited on it. It is called an arch because the neighboring regions to the north and west, and to the east-southeast are thick accumulations of sediments of the same general age, and indicate a deep basin to either side of the "arch".  The "arch" refers to how the sediments of that age group are thin and have a shallow bottom so are "high" relative to adjoining regions.  The sediments have the form of an arch when seen in cross section.

    The arch is a descriptive term that appears when seen in cross-section.

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