geologist hand holds raw specimen gray shale clastic sedimentary rock nature background |
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| navigate by keyword : accounting alkali andesite aphanitic background black carbon charcoal clastic close closeup coal cobble common content crust crystal earths extrusive finegrained food fossil found fuel geologists geology gray hand holds igneous intermediate isolated low macro metals mineral most natural nature object ore percent piece power raw rock rough sedimentary shale silica specimen stone texture volcanic white |
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| Shale is a laminated or fissile clastic sedimentary rock that is composed of the predominance of silt and clay other minerals, especially quartz and calcite. |
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