Shale features
The tiny particles formed by the hardening of clay material are easily broken and easily split into a distinct rock formation, a kind of clay rock. Complex composition, in addition to clay minerals (such as kaolinite, montmorillonite, hydromica, Bailai stone, etc.), also contains many detrital minerals (such as quartz, feldspar, mica, etc.) and authigenic minerals (such as iron, aluminum , manganese oxides and hydroxides, etc.). It has a sheet or lamella layer. Hit with a hard object and break into pieces. It is formed by compaction, dehydration and recrystallization of clay materials.
A clay rock with a thin sheet-like bedding structure formed by very fine clay and mud, formed by compaction, dehydration and recrystallization, is called shale. (The page is a scaly clay mineral that is arranged in parallel during compaction.) The shale is dense, with low hardness and dull surface. It is grayish black and black with organic matter.
The shale contains iron, red, brown, and other colors, as well as yellow, green, and other colors. The shale is weak in weather resistance and often forms low mountains and valleys in the terrain. Shale is impervious to water and often becomes impervious or aquifer.
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