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April 20, 2007, Newsletter Issue #136: Sedimentary Rock Identification I
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Tip of the Week
If a rock looks like itīs made of sand that has been cemented together, thatīs a sedimentary rock with clastic texture (sandstone). If it looks or feels like cemented gravel mixed with sand, or cemented silt or mud, thatīs also a sedimentary rock with clastic texture (conglomerate, siltstone, mudstone, shale).
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