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StockMasterTalk

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StockMasterTalk

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Thursday, 06/11/2015 1:21:52 PM

Thursday, June 11, 2015 1:21:52 PM

Post# of 10655
$UNGS Devonian shales are formed from the mud of shallow seas that existed about 350 million years ago (during the Devonian period of the Paleozoic era). Shale is a very fine-grained sedimentary rock, which is easily breakable into thin, parallel layers. It is a very soft rock, but does not disintegrate when it becomes wet.


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