Microscopic

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

Wednesday, August 05, 2020
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