sedimentary
Sandstone and Mixed Rock Assemblage
Clastic Sedimentary Rock / Quartz Arenite
Hardness varies from 6 to 7 on the Mohs scale depending on cementation; color ranges from tan, brown, yellow to grey; luster is dull or earthy; crystal structure is granular with quartz grains cemented by silica, calcite, or iron oxide.
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Physical properties
Hardness varies from 6 to 7 on the Mohs scale depending on cementation; color ranges from tan, brown, yellow to grey; luster is dull or earthy; crystal structure is granular with quartz grains cemented by silica, calcite, or iron oxide.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments, typically in desert, river, or beach environments over millions of years.
Uses & applications
Used in construction, building facades, paving stones, and as dimension stone.
Geological facts
Sandstone formations often preserve ancient ripple marks and fossil tracks, providing key clues about prehistoric environments.
Field identification & locations
Readily identified in the field by its grainy, sandpaper-like texture and visible mineral grains. Found worldwide in sedimentary basins.
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Banded Siltstone / Mudstone Pebble
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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Shale
Shale (clastic sedimentary rock)
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