Carbonate rocks
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Carbonate rocks. Carbonate rocks are composed of two minerals Calcite CaCO 3 Dolomite Ca Mg (CO 3 ). The principal constituents of limestones are 1. Allochemical components (ooids, bioclasts, peloids and intraclasts)

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Carbonate rocks

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Carbonate rocks

Carbonate rocks

Carbonate rocks are composed of two minerals

Calcite CaCO3

Dolomite Ca Mg (CO3 )

The principal constituents of limestones are

1. Allochemical components (ooids, bioclasts, peloids and intraclasts)

2. Micrite (microcrystalline calcite: refers to a crystal size less than 5 um)

3. Sparite (sparry calcite; refers to crystals of 5 um or more in diameter)

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Carbonate rocks

Dunham classification of limestone

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Carbonate rocks ooid grainstone

Carbonate rocksOoid Grainstone

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Carbonate rocks ooid packstone

Carbonate rocksOoid Packstone

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Carbonate rocks bioclast packstone

Carbonate rocksBioclast Packstone

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Carbonate rocks bioclast wackstone

Carbonate rocksBioclast Wackstone

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Carbonate rocks intraclast grainstone

Carbonate rocksIntraclast Grainstone

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Carbonate rocks peloid grainstone

Carbonate rocksPeloid Grainstone

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Carbonate rocks carbonate mudstone

Carbonate rocksCarbonate Mudstone

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Carbonate rocks dolomitic limestone the original sediment is a peloidal packstone

Carbonate rocksDolomitic limestone(The original sediment is a peloidal packstone)

The matrix have been replaced by dolomite, showing its characteristic euhedral rhombic shape

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Carbonate rocks dolomitic limeatone

Carbonate rocksDolomitic limeatone

A limestone section which has been treated with Alizarine Red S. Calcite showing shades of pink, red, and brown. The dolomite is colorless to grey and appears to be replacing matrix and/or cement.

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Carbonate rocks dolomite rock or dolostone

Carbonate rocksDolomite rock or dolostone

Dolomitic carbonate are classified according to their dolomite content:

dolomite

0-10% Limestone

10-50% dolomitic limestone

50-90% calcitic dolomite

90-100% dolomite

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Carbonate rocks1

Carbonate rocks

THE END

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