sedimentary
Sandstone
Sedimentary Rock (Quartz arenite/Arkose)
Hardness of 6-7 (driven by quartz grains), colors range from tan, brown, yellow, red, to grey, dull/earthy luster, clastic texture with visible or microscopic sand grains, no cleavage.
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Physical properties
Hardness of 6-7 (driven by quartz grains), colors range from tan, brown, yellow, red, to grey, dull/earthy luster, clastic texture with visible or microscopic sand grains, no cleavage.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, chiefly quartz and feldspar, in environments like deserts, rivers, and beaches over millions of years.
Uses & applications
Used widely in construction as dimension stone, building material, paving, and formerly for grindstones.
Geological facts
Many famous monuments and historic buildings worldwide are constructed from sandstone due to its workability and durability.
Field identification & locations
Identified by its sandy texture, visible grains, and relative durability. Commonly found in sedimentary basins and geological formations worldwide.
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Sandstone or Siltstone
Arenite (if sandstone)
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Septarian Concretion containing Brachiopods/Crinoids
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Quartz pebble
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Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
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Banded Siltstone / Mudstone Pebble
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