Skeletal - Calcareous Algae - Cyanobacteria (Al/16/Hol/GSL Ut)
| Outstanding feature |
Irregular spheroids of fibrous aragonite & algal micrite layers |
| Folk Classification |
Algal biolithite with aragonite spheroids |
| Dunham Classification |
Algal boundstone with aragonite spheroids |
| Common Grains |
Fibrous aragonite & algal micrite layers |
| Sorting |
None |
| Rounding |
None |
| Micritization & envelopes |
Micritization of algal layers on surface of aragonite spheroids growing in voids |
| Cement & diagenetic fabric |
Irregular spheroids of fibrous aragonite filling voids & micritization of algal layers |
| Porosity |
Depositional intrapartical cavernous 20% |
| Depositional Setting |
Lake shore well-cemented algal bioherm |
| Diagenetic history |
Micritization of algal layers on surface of growing aragonite spheroids |
Poorly-laminated cyanobacterial stromatolite head from the shore of the Great Salt Lake exhibiting micritization of algal layers on surface of growing aragonite spheroids that fill depositional porosity and are replaceing the micritic fabric precipitated within the cyanobacterial material..
Thursday, November 11, 2021