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Shale, or Shale, is a sedimentary rock of complex composition, but with thin or laminar joints. It is mainly rock formed by clay deposition under pressure and temperature, but it is mixed with fragments of quartz, feldspar and other chemicals. Strike with something hard and easily break into pieces. The ability to resist weathering is weak, and often forms low mountains and valleys due to erosion on the topography. Shale is impermeable and often becomes a water-barrier in groundwater distribution. Formed in the environment of still water, sediment after a long time of deposition, so often exist in lakes, rivers and deltas, there is also the formation of shale in the continental shelf of the ocean, shale also often contains the fossils of ancient plants and animals.
此枚页岩呈红褐色，有光泽。This shale is reddish-brown and lustrous.
表层面有些许粗糙感。The surface is a little rough.