Sandstone (likely Arkosic or Lithic Sandstone)

Physical Properties

Hardness: 6-7 (individual grains); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal Structure: Clastic texture with visible sand-sized grains; Specific Gravity: 2.2 - 2.8

Formation & Geological History

Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments (clasts). Typically forms in desert, river, or coastal environments over millions of years.

Uses & Applications

Commonly used as a building material, in the manufacture of glass (if high silica), and as a reservoir rock for oil, gas, and groundwater.

Geological Facts

Sandstone makes up about 20% to 25% of all sedimentary rocks on Earth. It is famous for creating dramatic landscapes like the Grand Canyon and Antelope Canyon.

Field Identification & Locations

Identify in the field by its 'sandpaper' feel; if you rub it, small grains may flake off. Look for visible layering (bedding). It is found globally in sedimentary basins.

Identified on: 4/24/2026

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