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
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