sedimentary
Shale
Clastic Sedimentary Rock
AI-generated identification · may be incorrectMohs hardness 3, gray to black color, dull luster, fine-grained laminated structure, excellent fissile cleavage, specific gravity around 2.5.
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Physical properties
Mohs hardness 3, gray to black color, dull luster, fine-grained laminated structure, excellent fissile cleavage, specific gravity around 2.5.
Formation & geological history
Formed through the compaction of silt and clay-sized mineral particles in quiet depositional environments over millions of years.
Uses & applications
Used in the manufacturing of bricks, tiles, and cement, and as a source rock for hydrocarbons.
Geological facts
Shale is the most abundant sedimentary rock on Earth, comprising roughly 70 percent of Earth's crustal sedimentary rocks.
Field identification & locations
Identified by its fine laminations and tendency to split into thin, parallel layers; found worldwide in sedimentary basins.
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Shale
Shale (clastic sedimentary rock)
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Shale (or Mudstone/Siltstone)
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