Chertification (B111/K/Tx )
 2.5x
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 2.5x cross nicols
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 2.5x wave plate
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 5x
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 5x wave plate
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 2.5
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 2.5x wave plate
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 5x
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 5x wave plate
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| Outstanding feature | Chert replaces bioclastic grains & micrite and spar cement |
| Folk Classification | Chertified foraminifera biomicrite |
| Dunham Classification | Chertified foraminifera packstone |
| Common Grains | Foraminifera, intraclasts & micrite envelopes |
| Sorting | Well sorted |
| Rounding | Well rounded |
| Micritization & envelopes | Micrite envelopes common |
| Cement & diagenetic fabric | Almost complete replacement by chert |
| Porosity | No porosity |
| Depositional Setting | High energy shoal |
| Diagenetic history | Chertification of skeleletal grains and micrite cement |
Replacement of skeletal and micritic materials by chert.
Thursday, November 11, 2021