A fine-grained, fissile, detrital sedimentary rock formed by consolidation of clay and silt-sized particles into thin, relatively impermeable layers. It is the most abundant sedimentary rock.
Shale
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A fine-grained, fissile, detrital sedimentary rock formed by consolidation of clay and silt-sized particles into thin, relatively impermeable layers. It is the most abundant sedimentary rock.
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