sedimentary

Sandstone (Greywacke/Lithic Sandstone)

Arenite / Lithic Sandstone

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Grey to brownish-grey; Luster: Dull/Earthy; Structure: Clastic, fine-to-medium grained; High quartz and feldspar content with rock fragments.

Hardness: 6-7 on Mohs scale
Color: Grey to brownish-grey
Luster: Dull/Earthy

Identified April 10, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Grey to brownish-grey; Luster: Dull/Earthy; Structure: Clastic, fine-to-medium grained; High quartz and feldspar content with rock fragments.

Formation & geological history

Formed from the accumulation of sand-sized minerals or rock grains in high-energy environments like rivers, beaches, or deep-sea fans. Geological age varies greatly but most common surface finds range from 20 to 500 million years old.

Uses & applications

Used primarily in construction as a building material, road base, and landscape stone. Sometimes used for making grindstones or in glass manufacturing if the quartz content is high enough.

Geological facts

Sandstone accounts for about 20% of all sedimentary rocks on Earth. It is a critical reservoir rock for both petroleum and underground water (aquifers) due to its porosity.

Field identification & locations

Identify by its 'sandpaper' feel and visible grains. It is commonly found in riverbeds, coastal cliffs, and desert outcrops. Look for layered bedding planes (stratification).