Sedimentary rock derived from mud Commonly finely laminated (bedded) Particles in shale are commonly clay minerals mixed with tiny grains of quartz eroded from pre-existing rocks Shaley means like a shale or having some shale component, as in shaley sandstone
A compacted sedimentary rock composed of detrital grains of clay and silt, finer than sandstone Because they are tightly compacted and have virtually no permeability, shales may act as seals to prevent the migration, and permit the entrapment of, hydrocarbons
Rock that is often impervious to water (will not allow water to move through it) but rather soft, brittle, and easily eroded Shale is the result of compaction of silt or mud Much of the Permian and Pennsylvanian strata in Kansas consists of various shales, often brightly colored
A sedimentary rock composed of detrital sediment particles less than 0 004 millimeter in diameter Shales tend to be red, brown, black, or gray, and usually originate in relatively still waters
A fine-grained sedimentary rock, formed by the consolidation of clay, silt, or mud It is characterized by finely laminated structure and is sufficiently indurated so that it will not fall apart on wetting
A fine-grained sedimentary rock formed by the consolidation of clay, silt, or mud It is characterized by finely laminated structure which imparts fissures parallel to the bedding along which the rock may easily break It may be red, brown, black or grey in colour
a very fine-grained, thinly layered sedimentary rock composed of clay and/or mud grains less than 1/256 mm in size Shales break easily along their layering, especially along weathered surfaces They feel smooth to the touch, not gritty
Fissile sedimentary rock formed from mud (silt and clay) Where organic compounds are abundant, the shale is black whereas lower organic content results in lighter colors
Shale is smooth soft rock that breaks easily into thin layers. a smooth soft rock which breaks easily into thin flat pieces. Any of a group of fine-grained, laminated sedimentary rocks consisting of silt-and clay-sized particles. Shale constitutes roughly 60% of the sedimentary rock in the Earth's crust. Shales are commercially important, particularly in the ceramics industry. They are a valuable raw material for tile, brick, and pottery and constitute a major source of alumina for portland cement. In addition, advances in recovery methods may one day make oil shale a practical source for liquid petroleum. Burgess Shale oil shale shale oil kerogen shales
A fissile rock that is formed by the consolidation of clay, mud, or silt, has a finely stratified or laminated structure, and is composed of minerals essentially unaltered since deposition
shaly
Pronunciation
Etymology
[ 'shA(&)l ] (noun.) 1747. probably from obsolete or dialect shale scale, shell, from Middle English, from Old English scealu; more at SHELL.