Skeletal - Corals, Halimeda, Forams, & Molluscs (B/18/Ple/Eni)
 2.5x
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 5x
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 10x
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 2.5x
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 5x
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 10x
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 2.5x
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 2.5x
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 5x
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 10x
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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