sedimentary
Sandstone Pebble
Sandstone (primarily Quartz, SiO2)
AI-generated identification · may be incorrectHardness 6-7, tan to yellowish-brown weathered surface with exposed grey core, dull to earthy luster, granular sedimentary texture
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Physical properties
Hardness 6-7, tan to yellowish-brown weathered surface with exposed grey core, dull to earthy luster, granular sedimentary texture
Formation & geological history
Formed by the compaction and cementation of mineral particles or rock fragments, typically deposited in ancient riverbeds, beaches, or desert dunes over millions of years
Uses & applications
Commonly used in construction, landscaping, flagstones, and as a general building material
Geological facts
Sandstone represents about 10 to 20 percent of the Earth's sedimentary rocks and often preserves cross-bedding structures from ancient currents
Field identification & locations
Identified by its scratchy, sandpaper-like texture and distinct rounded river-worn shape; found worldwide along riverbeds, beaches, and sedimentary rock formations
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
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Sandstone
Arenite
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Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary