sedimentary
Sedimentary Outcrop (Sandstone/Shale)
Sedimentary bedrock formation (variable composition)
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
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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.
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