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Limestone (Lime) [ Geology  ]

Dictionary of botanic terminology - index of names

     
  Limestone is a common sedimentary rock consisting mostly of the mineral calcite (calcium carbonate, CaCO3)  

The primary source of this calcite are the skeletons and shells of marine organisms. Secondary calcite may also be deposited by supersaturated waters such as stalagmites and stalactites. Limestone makes up approximately 10 percent of the total volume of all sedimentary rocks. Pure limestones are white or almost white. Because of impurities, such as clay, sand, organic remains, iron oxide and other materials, many limestones exhibit different colours, especially on weathered surfaces.

Soils reach in limestone (calcareous soils) are alkaline. The particular plants adapted to live in such a calcareous habitat are called calciophilous plant.

Many cactus and succulents are calciophilous and need some limestone grit/sand  in the potting mix.

 

 

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