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Line 130: − [[File:GeoWikiWriteOff2021-Abdulwahab-Figure3.png|thumbnail|Fig. 3 Intrasparite [3]]] − [[File:GeoWikiWriteOff2021-Abdulwahab-Figure4.png|thumbnail|Fig. 4 Oosparite [4]]] − [[File:GeoWikiWriteOff2021-Abdulwahab-Figure5.png|thumbnail|Fig. 5 Biosparite [5]]] − [[File:GeoWikiWriteOff2021-Abdulwahab-Figure6.png|thumbnail|Fig. 6 Pelsparite [6]]] − [[File:GeoWikiWriteOff2021-Abdulwahab-Figure7.png|thumbnail|Fig. 7 Intramicrite [7]]] − [[File:GeoWikiWriteOff2021-Abdulwahab-Figure8.png|thumbnail|Fig. 8 Oomicrite [8]]] − [[File:GeoWikiWriteOff2021-Abdulwahab-Figure9.png|thumbnail|Fig. 9 Biomicrite [9]]] Line 137:
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Carbonate sedimentary rocks classification (view source)
Revision as of 21:21, 5 December 2023
, 21:21, 5 December 2023no edit summary
==History==
==History==
Various classification systems had been proposed for both academia and industry purposes:
Various classification systems had been proposed for both academia and industry purposes:
* Wentworth (1922) [a]
* Wentworth (1922){{note|a}} [a]
* Bramkamp & Powers (1958)
* Bramkamp & Powers (1958)
* Folk (1959,1962)
* Folk (1959,1962)
Folk defined a fourth family based on in situ organic growth deposits: biolithite.[d]
Folk defined a fourth family based on in situ organic growth deposits: biolithite.[d]
<gallery mode=packed heights=300px widths=300px>
File:GeoWikiWriteOff2021-Abdulwahab-Figure1.png|center|framed|{{figure number|1}}Folk classification system for carbonate rock (1959)
File:GeoWikiWriteOff2021-Abdulwahab-Figure2.png|center|framed|{{figure number|2}}Folk subdivisions of major families
</gallery>
===Subdivision of Major Families===
===Subdivision of Major Families===
Family I and II of Folk’s system could be subdivided based on the type of allochems presented. The most important types of allochems are: intraclasts, oolites, fossils, and pellets respectively. A total of eight subdivisions are diagrammatically presented in Figure 2.[e]
Family I and II of Folk’s system could be subdivided based on the type of allochems presented. The most important types of allochems are: intraclasts, oolites, fossils, and pellets respectively. A total of eight subdivisions are diagrammatically presented in Figure 2.[e]
Family I subdivisions
Family I subdivisions
* Biosparite: consists of fossils with sparry calcite cement (Figure 5).
* Biosparite: consists of fossils with sparry calcite cement (Figure 5).
* Pelsparite: consists of pellets with sparry calcite cement (Figure 6).
* Pelsparite: consists of pellets with sparry calcite cement (Figure 6).
<gallery mode=packed heights=300px widths=300px>
File:GeoWikiWriteOff2021-Abdulwahab-Figure3.png|{{figure number|3}}Intrasparite
File:GeoWikiWriteOff2021-Abdulwahab-Figure4.png|{{figure number|4}}Oosparite
File:GeoWikiWriteOff2021-Abdulwahab-Figure5.png|{{figure number|5}}Biosparite
[[File:GeoWikiWriteOff2021-Abdulwahab-Figure6.png|{{figure number|6}}Pelsparite
</gallery>
Family II subdivisions
Family II subdivisions
* Intramicrite: consists of intraclasts with microcrystalline matrix (Figure 7).
* Intramicrite: consists of intraclasts with microcrystalline matrix (Figure 7).
* Biomicrite: consists of fossils with microcrystalline matrix (Figure 9).
* Biomicrite: consists of fossils with microcrystalline matrix (Figure 9).
* Pelmicrite: consists of pellets with microcrystalline matrix (Figure 10).
* Pelmicrite: consists of pellets with microcrystalline matrix (Figure 10).
<gallery mode=packed heights=300px widths=300px>
File:GeoWikiWriteOff2021-Abdulwahab-Figure7.png|{{figure number|7}}Intramicrite
File:GeoWikiWriteOff2021-Abdulwahab-Figure8.png|{{figure number|8}}Oomicrite
File:GeoWikiWriteOff2021-Abdulwahab-Figure9.png|{{figure number|9}}Biomicrite
</gallery>
===Depositional Energy Setting and Reservoir Quality Indications===
===Depositional Energy Setting and Reservoir Quality Indications===
==Gallery==
==Gallery==
[[File:GeoWikiWriteOff2021-Abdulwahab-Figure10.png|thumbnail|Fig. 10 Pelmicrite [10]]]
[[File:GeoWikiWriteOff2021-Abdulwahab-Figure10.png|thumbnail|Fig. 10 Pelmicrite [10]]]
[[File:GeoWikiWriteOff2021-Abdulwahab-Figure13.png|thumbnailFig. 13 Mudstone [13]]]
[[File:GeoWikiWriteOff2021-Abdulwahab-Figure13.png|thumbnailFig. 13 Mudstone [13]]]
==Notes==
==Notes==
1. ^[a] Early carbonate classification is grain-size based system: Calcilutite (grains < 63 μm), calcarenite (63 μm < grains < 2mm), calcirudite (grains > 2mm).
:1. {{note|a}} ^[a] Early carbonate classification is grain-size based system: Calcilutite (grains < 63 μm), calcarenite (63 μm < grains < 2mm), calcirudite (grains > 2mm).
2. ^[b] This family has restricted limits because cement by itself cannot form a rock and the supported framework component (allochems) has limited packing.
2. ^[b] This family has restricted limits because cement by itself cannot form a rock and the supported framework component (allochems) has limited packing.