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The matrix have been replaced by dolomite, showing its characteristic euhedral rhombic shape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