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Andrew Alden

Chert: The Gallery

By December 23, 2012

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chert picturesMany people can tell sandstone and shale and limestone and even conglomerate, but they're not familiar with chert. Our remote ancestors kept a close lookout for it, because its special qualities made chert a good toolstone. If it was good enough for them, we should add it to our rock repertoire. That's what this new picture gallery of chert is for: to renew acquaintance with this old friend.
Chert beach pebbles — Geology Guide photo

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