sedimentary
Sandstone (or Weathered Limestone Pebble)
Arenite / Calcarenite
AI-generated identification · may be incorrectMohs hardness 3-7 depending on cementation, dull/earthy luster, tan to light brown color, rough granular texture.
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Physical properties
Mohs hardness 3-7 depending on cementation, dull/earthy luster, tan to light brown color, rough granular texture.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments in shallow marine or terrestrial environments.
Uses & applications
Commonly used in construction aggregate, landscaping, paving, and decorative stonework.
Geological facts
Natural weathering and water erosion often shape these softer sedimentary clasts into irregular, porous, and pitted shapes.
Field identification & locations
Identifiable by its gritty, sand-like texture and earthy tan coloration; common in riverbeds, soils, and gravel deposits worldwide.
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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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Shale (clastic sedimentary rock)
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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