Sedimentary Rocks (Extra - Folks Basic and Textural Classification, Dunham Classification Flashcards
Sparry calcite: Intraclasts
Intrasparite
Sparry calcite: Oolites
Oosparite
Sparry calcite: Fossils
Biosparite
Sparry calcite: Pellets
Pelsparite
Micrite matrix: Intraclasts
Intramicrite
Micrite matrix: Oolites
Oomicrite
Micrite matrix: Fossils
Biomicrite
Micrite matrix: Pellets
Pelmicrite
Microcrystalline calcite
Micrite
Microcrystalline spar
Dismicrite
Autochthonous reef rocks
Biolithite
2/3 Micrite Matrix with less than 1% allochems
Micrite
2/3 Micrite Matrix with 1-10% allochems
Fossilliferous biomicrite
2/3 Micrite Matrix with 10-50% allochems
Sparse biomicrite
2/3 Micrite Matrix with more than 50% allochems
Packed biomicrite
Subequal Micrite/Spar
Poorly Washed Biosparite
2/3 of Spar Cement that has Poor Sorting
Unsorted Biosparite
2/3 of Spar Cement that has Good Sorting
Sorted Biosparite
2/3 of Spar Cement that has Rounded & Abraded
Rounded Biosparite
Less than 10% mud supported stone
Mudstone
More than 10% grains mud supported stone
Wackestone
Grains supported stone
Packstone
Lacks mud and is grain supported
Grainstone
Matrix supported stone
Floatstone
Supported by >2mm component
Rudstone
3 Subdivisions of Boundstone
Bafflestone - baffles
Bindstone - encrust and bind
Framestone - rigid framework
3 Subdivisions of Boundstone
Bafflestone - baffles
Bindstone - encrust and bind
Framestone - rigid framework
Depositional texture that is not recognizable
Crystalline