S12. Limestone - Peloidal-rich biomicrite / wakestone
We would like to thank the following for the use of this sample:
This sample can be classified using the Dunham/Folk Classification. Dark grey fine grained limestone with ostracod fragments. Dark muddy lst with >10 % grains mud supported. % content: grains 20% (mostly ostracod / brachs <0.5 mm), sparite cement 10% (mainly within bivalved shells), micrite 70 % (entire micrite matrix incl peloids), no non-carbonate components. Non-skeletal grains: 95% peloids, 5% ooids, 5% grapestones, also calcispheres. Skeletal grains: 100% ostracod (most likely as small thin shells) vs. brach shells. Classification: Peloidal-rich biomicrite / wackestone. Diagenesis: Some evidence of compaction and sutured contacts. Flattened peloids. Cement crystals are non-syntaxial calcite crystals that fill previous pore space. Perhaps larger spar crystals formed after micrite mud - calcitisation.
Ma = Millions of years ago