Skeletal - Corals, Halimeda, Forams, & Molluscs (B/18/Ple/Eni)
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Outstanding feature |
Varied grains & diagenetic history |
Folk Classification |
Biosparite & biomicrite |
Dunham Classification |
Bioclastic grainstone & biowackestone |
Common Grains |
Corals, halimeda, forams, & molluscs |
Sorting |
Varies from good to poor |
Rounding |
Rounded to angulat |
Micritization & envelopes |
Envelopes developing but surface only |
Cement & diagenetic fabric |
Marine fibrous aragonite & micrite |
Porosity |
30% interparticle |
Depositional Setting |
High to low energy margin of atoll |
Diagenetic history |
Largely marine cements |
Atoll margin showing largely marine cementation of Corals, halimeda, foraminfera , & molluscs. Marine cement ranges from fibrous argonite to micritic cements. Juxtopostion of this range of cement fabrics and grains is reminiscent of a beach rock setting!!!
Thursday, November 11, 2021