Limestone Rock


Limestone rock is a marine biochemical sedimentary rock.

It is a very common rock, and it forms extensive and thick layers. 





The main mineral is calcite.

Others include dolomite, aragonite, siderite, quartz and pyrite. 

 grey limestone

It is most often light grey, but can be white and pinkish too.

 brown limestone

The habit can be grainy or compact.

 limestone properties

Ripple marks or cross bedding may be present. 

 limestone rock


Its texture can be either fine and fossil-free, or coarse and fossil-rich.

 crushed limestone
 By Frans de Wit via Flickr.com

The fossil-rich variety can be angular or rounded, or anything between. 

 limestone blocks 
 By Frans de Wit via Flickr.com

The fossils are marine and freshwater invertebrates.

 limestone flooring
 By Paul McCoubrie via Flickr.com

This rock is formed from the calcareous shells and skeletons of marine organisms, or from the precipitation of calcium carbonate from sea water in shallow, warm seas.

 limestone countertops  
 By ehnotsomuch42 via Flickr.com

It is used in agriculture, in metallurgical processes (as a flux), as building stone, and in the process of making glass and cement.













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