Caprock

Caprock or cap rock is a more resistant rock type overlying a less resistant rock type,[1] analogous to an upper crust on a cake that is harder than the underlying layer.

  1. ^ Kearey, Philip (2001). Dictionary of Geology, 2nd ed., Penguin Reference, London, New York, etc., p. 41.. ISBN 978-0-14-051494-0.

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