macro texture sandstone rock |
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| navigate by keyword : clastic crust earths feldspar geological geoogy grains grit gritty macro minerals quartz resistant rock rocks sand sandsized sandstone sandstones sedimentary silicate surface texture they wave waves wavy weathering |
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| Sandstone is a clastic sedimentary rock composed mainly of sand-sized silicate grains. Sandstones comprise about 20ââ¬â25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar because they are the most resistant minerals to weathering processes at the Earth`s surface. |
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