sedimentary
Sandstone
Clastic Sedimentary Rock
Hardness varies from 6 to 7 depending on cementation (quartz grains), color ranges from tan, brown, yellow, red, grey, to pink, luster is dull or earthy, crystal structure is detrital/granular with quartz, feldspar, and rock fragments, cleavage is none, specific gravity is 2.2 to 2.8.
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Physical properties
Hardness varies from 6 to 7 depending on cementation (quartz grains), color ranges from tan, brown, yellow, red, grey, to pink, luster is dull or earthy, crystal structure is detrital/granular with quartz, feldspar, and rock fragments, cleavage is none, specific gravity is 2.2 to 2.8.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments of sand size, typically in environments like deserts, rivers, beaches, and shallow marine settings over millions of years.
Uses & applications
Widely used in construction as a building material, dimension stone, paving, and formerly for grindstones.
Geological facts
Sandstone formations often serve as excellent aquifers for groundwater and are common reservoirs for oil and natural gas due to their porous nature.
Field identification & locations
Identify in the field by its gritty texture like sandpaper and visible sand grains; commonly found worldwide in sedimentary basins, cliffs, and desert regions.
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