Shale
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Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals and tiny fragments of other minerals, especially quartz and calcite. Shale is characterized b
Shale
Sample of drill cuttings of shale while drilling an oil well in Louisiana, United States. Sand grain = 2 mm in diameter
Color chart for shale based on oxidation state and organic carbon content
Shale in Potokgraben, the Karawanks, Austria
Mudrock
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Mudrocks are a class of fine-grained siliciclastic sedimentary rocks. The varying types of mudrocks include siltstone, claystone, mudstone and shale. Most of the particles of which the stone is compos
Shale
…property is called fissility. Shale is the most common sedimentary rock. The term shale is sometimes applied more broadly, as essentially a synonym for mudrock, rather than in the narrower sense of clay-rich fissile mudrock. Shale typically exhibits varying degrees of fissility. Because of the parallel orientation…
Glacial Lake Missoula claystone
Red mudrock in the Ragged Reef Formation (Pennsylvanian), Cumberland Basin, Nova Scotia
Claystone in Slovakia
Siltstone at UAT, Estonia