sedimentary

Sedimentary Outcrop (Sandstone/Shale)

Sedimentary bedrock formation (variable composition)

AI-generated identification · may be incorrect

Hardness: 3-7 (depending on mineral cement); Color: Tan, brown, reddish-brown; Luster: Dull/Earthy; Structure: Stratified layers, clastic texture; Specific gravity: approx. 2.0-2.6

Hardness: 3-7 (depending on mineral cement)
Color: Tan, brown, reddish-brown
Luster: Dull/Earthy

Identified July 3, 2026More sedimentary →

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Physical properties

Hardness: 3-7 (depending on mineral cement); Color: Tan, brown, reddish-brown; Luster: Dull/Earthy; Structure: Stratified layers, clastic texture; Specific gravity: approx. 2.0-2.6

Formation & geological history

Formed through the accumulation and lithification of mineral particles or rock fragments over millions of years, typically in fluvial or lacquered environments during various geological eras from the Paleozoic to Cenozoic.

Uses & applications

Used in construction, landscaping, and as a source of aggregate. In situ outcrops are key features for geological mapping and environmental study.

Geological facts

Sedimentary rocks cover 75% of the Earth's land surface. They are the primary source for the world's groundwater, fossil fuels, and fossil records.

Field identification & locations

Identify in the field by looking for distinct horizontal layering (bedding planes) and grainy textures near water bodies. Commonly found along shorelines and riverbanks.