sedimentary

Sandstone (likely Greywacke or Siltstone variety)

Arenite / Siltstone (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Grey/light brown with speckled weathering; Luster: Dull/Earthy; Structure: Clastic, fine-grained; Cleavage: None (conchoidal to irregular fracture); Specific Gravity: 2.2–2.8

Hardness: 6-7 Mohs
Color: Grey/light brown with speckled weathering
Luster: Dull/Earthy

Identified April 19, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. This specimen likely formed in a marine shelf environment where tectonic activity introduced mixed lithic fragments (Greywacke).

Uses & applications

Used primarily as aggregate in construction, road base, and occasionally as dimension stone for landscaping or building veneers if the bedding is stable.

Geological facts

Sandstone is one of the most common sedimentary rocks in the Earth's crust. It is highly porous and often acts as a natural aquifer or a reservoir for petroleum and natural gas.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible layering or bedding planes. It is commonly found in sedimentary basins, canyons, and mountainous regions worldwide.