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siltstone
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siltstone Pensacola Mountains A chart categorizes common textural terms for rocks by grain size in millimeters, dividing them into igneous and metamorphic, sedimentary, and pyroclastic types, with terms like phaneritic, sand, silt, breccia, and ash shown in relation to size.
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Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.
(Bed) Rocks and (Flint) Stones
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siltstone
Holtzclaw siltstone outcrop, Louisville, Kentucky, U.S.
John Knouse
Pensacola Mountains
Exposed stratified rock of the Beacon Group in the Pensacola Mountains near the South...
Courtesy of the U.S. Geological Survey
rock textural terms
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