Chertification ( B/113/Eo/Ut )
 2.5x
|
 2.5x wave plate
|
 5x
|
 5x wave plate
|
 2.5x
|
 2.5 wave plate
|
| Outstanding feature | Chert replaces grains, bioclastic grains & micrite and spar cement |
| Folk Classification | Chertified pisolites & fossil biomicrite |
| Dunham Classification | Chertified pisolites & fossil packstone |
| 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