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ArchivesShale is
in reply to a message by Jerry Kosik
another word for crushed rock - see these dictionary definitions
Noun 1. shale - a sedimentary rock formed by the deposition of successive layers of clay
sedimentary rock - rock formed from consolidated clay sediments
humic shale - shale that is rich in humic acids
oil shale - shale from which oil can be obtained by heating
Noun 1. shale - a sedimentary rock formed by the deposition of successive layers of clay
sedimentary rock - rock formed from consolidated clay sediments
humic shale - shale that is rich in humic acids
oil shale - shale from which oil can be obtained by heating
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