Keywords: origin of carbonate sedimentary rocks pdf, limestone formation, dolomitization process, carbonate diagenesis, biogenic precipitation.
Most marine limestones are biologically mediated , not purely chemical.
: Most carbonates form in tropical to subtropical zones (typically ±30∘plus or minus 30 raised to the composed with power origin of carbonate sedimentary rocks pdf
For a "carbonate factory" to thrive, specific environmental factors must be met:
The transition from loose carbonate sediment to solid rock occurs through : Microbiological Mediation | Grain type | Origin |
Most modern carbonates are the result of skeletal remains. Marine organisms like corals, mollusks, foraminifera, and green algae extract calcium and bicarbonate ions from seawater to build their shells or skeletons. When these organisms die, their remains accumulate on the seafloor. 2. Microbiological Mediation
| Grain type | Origin | |------------|--------| | | Broken or whole skeletal fragments | | Ooids | Coated grains formed by wave agitation + precipitation | | Peloids | Micritic pellets (often fecal pellets or altered grains) | | Intraclasts | Eroded fragments of partially lithified carbonate | | Lithoclasts | Eroded fragments of older lithified carbonate | consider this typical pathway:
To visualize the , consider this typical pathway:
