Chertification ( B/112/Pm/NMx )
 2.5x
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 2.5x wave plate
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 5x
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 5x wave plate
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 2.5x
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 2.5 wave plate
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 5x
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 5x wave plate
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| Outstanding feature | Chert replaces oids, bioclastic grains & micrite and spar cement |
| Folk Classification | Chertified ooid & brachiopod biosparite |
| Dunham Classification | Chertified ooid brachiopod grainstone |
| Common Grains | Ooids, brachiopods, intraclasts & micrite envelopes |
| Sorting | Well sorted |
| Rounding | Well rounded |
| Micritization & envelopes | Micrite envelopes present |
| Cement & diagenetic fabric | Almost complete replacement by chert |
| Porosity | No porosity |
| Depositional Setting | High energy shoal |
| Diagenetic history | Chertification of ooids, skeleletal grains and sparite cement |
Replacement of ooids, skeletal and spar cement by chert.
Thursday, November 11, 2021