This lake in Edwardsville, Illinois fills an abandoned shale quarry. This shale is a clastic sedimentary rock formed when mud deposited in a swampy area about 300 million years ago and since lithified. Before reclamation laws were in place, the shale was mined to make bricks. The quarry was not filled in and returned to its pre-mining state, but left as a lake.
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Jul10 13
Last Modified: 2014-08-27 10:22:56
Permanent URL: https://serc.carleton.edu/download/images/40273/photo_shale_quarry_edwardsvill.webp
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Provenance
Photo taken by Joy Branlund, Southwestern Illinois College.
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