Micrite Cement with Halimeda, Echinoid Overgrowths & Forams (Mic/3/Pl/Fla)
 2.5x cross nicols
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 5x
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 5x cross nicols
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 2.5x
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 2.5x cross nicols
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 2.5x
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| Outstanding feature |
Foraminifera, halimeda, vermiculid gastropods cemented by micrite |
| Folk Classification |
Poorly washed biomicrite |
| Dunham Classification |
Bioclastic wackestone |
| Common Grains |
Foraminifera, halimeda and vermiculid gastropods |
| Sorting |
Poor |
| Rounding |
Little |
| Micritization & envelopes |
Some alteration of the margins of bioclasts |
| Cement & diagenetic fabric |
Micrite |
| Porosity |
25% interparticle and intraparticle |
| Depositional Setting |
Low energy proteced area in reef |
| Diagenetic history |
Early disolution of some of aragonite, eg Halimdeda. |
This fabric is typical of a cemented reef fabric. The high energy grains accumulated in a very low energy setting within the reefs which was exposed to marine waters and then freshwater diagenesis.
Thursday, November 11, 2021