Changes

===Extended Dunham Classification (1971)===

===Extended Dunham Classification (1971)===

[[File:GeoWikiWriteOff2021-Abdulwahab-Figure18.png|thumbnail|400px|{{Figure number|18}}Extended Dunham classification (1971)]]  

[[File:GeoWikiWriteOff2021-Abdulwahab-Figure18.png|thumbnail|500px|{{Figure number|18}}Extended Dunham classification (1971)]]  

Embry and Klovan expanded the original Dunham classification due to the lack of:

Embry and Klovan expanded the original Dunham classification due to the lack of:

* Classifying coarse-grained (>2mm) rocks.  

* Classifying coarse-grained (>2mm) rocks.  

====Coarse-Grained Rocks Classification====

====Coarse-Grained Rocks Classification====

• Floatstone: a matrix-supported rock with > 10% of grains >2mm and original components are not organically bounded together during deposition (Figure 19).   

* Floatstone: a matrix-supported rock with > 10% of grains >2mm and original components are not organically bounded together during deposition (Figure 19).   

• Rudstone: a grain-supported rock with > 10% of grains >2mm and original components are not organically bounded together during deposition (Figure 20).

* Rudstone: a grain-supported rock with > 10% of grains >2mm and original components are not organically bounded together during deposition (Figure 20).

====Organically-Bound Rocks Subdivision====

====Organically-Bound Rocks Subdivision====

• Bafflestone: in situ organically-bound rock in which organisms act as baffles (Figure 21).

* Bafflestone: in situ organically-bound rock in which organisms act as baffles (Figure 21).

• Bindstone: in situ organically-bound rock in which organisms encrust and bind (Figure 22).

* Bindstone: in situ organically-bound rock in which organisms encrust and bind (Figure 22).

• Framestone: in situ organically-bound rock in which organisms build a rigid framework (Figure 23).[k]

* Framestone: in situ organically-bound rock in which organisms build a rigid framework (Figure 23).[k]

===Depositional Energy Setting and Reservoir Quality Indications===

===Depositional Energy Setting and Reservoir Quality Indications===