Skeletal - Corals & Red Calcareous Algae (B/16/Ple/Eni)
| Outstanding feature |
Coral in micrite matrex, calcite cavity spar with micrite fill perched on spar |
| Folk Classification |
Coral biomicrite |
| Dunham Classification |
Coral wackestone |
| Common Grains |
Corals, red calcarous algae and halimeda flake |
| Sorting |
Poor |
| Rounding |
Angular |
| Micritization & envelopes |
Micritic alteration of red calc algae |
| Cement & diagenetic fabric |
Micrite cement is early but late equant spar is final fll |
| Porosity |
Varies between 5% to 30% cavity |
| Depositional Setting |
Low energy portion of atoll margin |
| Diagenetic history |
Marine micrite to fw equant spar |
Well drillled to 116 ft in the margin of the Eniwetok atoll in the Marshal Islands. The sample seems to be full of angular coral fragments, with a large coral fragment and some red calcareous algae and a halimeda flake that has undergone disolution and replacement.
Thursday, November 11, 2021