sedimentary
Sandstone
Quartzose Sandstone (Sedimentary Rock)
Hardness of 6 to 7 on the Mohs scale (due to quartz grains); colors range from tan, brown, yellow, red, to gray; dull or earthy luster; composed mostly of mineral quartz and feldspar cemented together; specific gravity around 2.2 to 2.8.
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Physical properties
Hardness of 6 to 7 on the Mohs scale (due to quartz grains); colors range from tan, brown, yellow, red, to gray; dull or earthy luster; composed mostly of mineral quartz and feldspar cemented together; specific gravity around 2.2 to 2.8.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, chiefly quartz, that measure between 0.063 and 2 millimeters in diameter, often in desert, beach, or river environments over millions of years.
Uses & applications
Commonly used in construction, building facades, paving stones, flagstones, and historically for grinding stones and whetstones.
Geological facts
Sandstone formations like Zion National Park or the desert monuments in Utah showcase massive wind-blown cross-bedding patterns formed during ancient arid periods.
Field identification & locations
Identified by its gritty texture like sandpaper and visible mineral grains; found worldwide in sedimentary basins, cliffs, and riverbeds.
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