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The top documents tagged [shale sedimentary rock]
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shale sedimentary rock
Mass Movements. Mass movement- The down slope movement of earth material under the influence of gravity.
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MARCELLUS SHALE Natural Gas in Pennyslvania. Where is Marcellus Shale in PA? Marcellus Shale The contour lines tell thickness of the shale. Pink =
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Marcellus Shale
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4-15-11
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