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Shale

Updated Thursday, 28th September 2006

A brief description of the nature of shale

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Shale is a fine-grained sedimentary rock. It can be black, grey, brown or greenish/bluish. It is usually quite flaky.

Shale Copyrighted  image Icon Copyright: The Open University

How is it formed?
Shale is formed in the same way as mudstone: when clay particles settle to the floor in quiet lakes and lagoons. Shale is more flaky than mudstone.

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