carbonate rocks
DESCRIPTION
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) - PowerPoint PPT PresentationTRANSCRIPT
Carbonate ro Carbonate rockscks
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Carbonate rocks are composed of two minerals
Calcite CaCO3 Dolomite Ca Mg (CO3 ) The principal constituents of limestones ar
e 1. Allochemical components (ooids, biocla sts, peloids and intraclasts) 2 . Micrite (microcrystalline calcite: refers t
o a crystal size less than 5 um) 3. Sparite (sparry calcite; refers to crystal
5s of um or more in diameter)
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Dunham classification of limestone
Carbonate rocks Carbonate rocksOoid GrainstoneOoid Grainstone
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Carbonate rocks Carbonate rocksOoid PackstoneOoid Packstone
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Carbonate rocks Carbonate rocksBioclast PackstoneBioclast Packstone
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Carbonate rocks Carbonate rocksBioclast WackstoneBioclast Wackstone
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Carbonate rocks Carbonate rocksIntraclast GrainstoneIntraclast Grainstone
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Carbonate rocks Carbonate rocksPeloid GrainstonePeloid Grainstone
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Carbonate rocks Carbonate rocksCarbonate MudstoneCarbonate Mudstone
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Carbonate rocks Carbonate rocksDolomitic limestoneDolomitic limestone(The original sediment is a peloidal packstone)(The original sediment is a peloidal packstone)
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The matrix have been replaced by dolomite, showing its characteristic euhedral rhombic shape
Carbonate rocks Carbonate rocksDolomitic limeatoneDolomitic limeatone
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A limestone sec tion which has
been treated wi th Alizarine Red
S. Calcite showi ng shades of pi nk, red, and bro wn. The dolomit
e is colorless to grey and appea
rs to be replacin g matrix and/or
cement.
Carbonate rocks Carbonate rocksDolomite rock or dolostoneDolomite rock or dolostone
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Dolomitic carbonate are classified according to their dolomite content:
dolomite
0-10% Limestone
10-50% dolomitic limestone
50-90% calcitic dolomite
90-100% dolomite
Carbonate rocks Carbonate rocks
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