sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, typically reddish-brown to tan in color, dull or earthy luster, clastic texture, and specific gravity of 2.2-2.8.
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Physical properties
Hardness of 6-7 on the Mohs scale, typically reddish-brown to tan in color, dull or earthy luster, clastic texture, and specific gravity of 2.2-2.8.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments, predominantly quartz, over millions of years in desert, river, or marine environments.
Uses & applications
Widely used in construction as a building material, for paving, landscaping, and historically for grinding stones.
Geological facts
Famous for forming dramatic geological monuments like Zion and the Grand Canyon; its color often comes from iron oxide cement.
Field identification & locations
Easily identified by its gritty, sandpaper-like texture and visible mineral grains; commonly found worldwide in sedimentary basins.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image
fossil
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary