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Shale Formation near Whitehouse Mountain, Colorado
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, kaolin, Al2Si2O5(OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite. Shale is characterized by its tendency to split into thin layers (laminae) less than one centimeter in thickness.
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Photo credit: © Phil Degginger / Alamy / Afripics
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Keywords: clastic, clay, colorado, compaction, deposit, exposed, fissility, formation, geologic, geological, geology, minerals, mountain, rock, sedimentary, shale, whitehouse