Shale Rock


Shale rock is one of the most common sedimentary rocks.

It is the most common of all clastic sedimentary rocks.





It has silt and clay sized grains.

It consists mostly of clay minerals, but also others such as quartz, calcite and feldspar, and sometimes pyrite, iron and/or iron oxides.

  expanded shale
  By Travis via Flickr.com

It has a perfect layering and its splits very easily between the layers.

  shale rock 
  
By Travis via Flickr.com

It can be found in layers interbedded with limestone or sandstone, or it can occur in huge sheets by itself.

  general shale
  
By Ty via Flickr.com

It is formed on ocean bottoms, river floodplains or in the bottoms of shallow seas.

  shale sandstone 
  
By jclor via Flickr.com

It can contain fossils of marine animals and plants.

  shale sedimentary rock 
  
By Dan Mullen via Flickr.com

Thanks to its layering, it is widely used in making pottery, bricks and tiles.













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