sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
Hardness: 6-7 Mohs; Color: Tan, brown, or grayish-green as shown; Luster: Dull/Earthy; Texture: Granular and clastic; Structure: No visible bedding in this small piece, but rough to touch like sandpaper.
- Hardness
- 6-7 Mohs
- Color
- Tan, brown, or grayish-green as shown
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, brown, or grayish-green as shown; Luster: Dull/Earthy; Texture: Granular and clastic; Structure: No visible bedding in this small piece, but rough to touch like sandpaper.
Formation & geological history
Sand-sized grains of mineral, rock, or organic material are deposited by water, wind, or ice and then lithified through compaction and cementation. Common in ancient river beds, beaches, and deserts.
Uses & applications
Primarily used in construction for building stone, road base, and as a reservoir rock in the petroleum industry. Also used for decorative landscape stones.
Geological facts
Sandstone is one of the most common types of sedimentary rock and accounts for about 20% of all sedimentary rocks on Earth's crust. It often preserves fossils and ripple marks from ancient environments.
Field identification & locations
Identify in the field by its sandy, abrasive texture when rubbed. It can often be scratched by steel and handles like coarse-grit sandpaper. Look for it in outcrops with visible horizontal layering.
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