Neomorphosed Carbonate (N/11/Carb/Eng)
 2.5x
|
 2.5x
|
 5x
|
 2.5 cross nicols
|
 2.5 cross nicols
|
 2.5 wave plate
|
 2.5 wave plate
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 5x wave plate
|
| Outstanding feature |
Radiaxial calcite crystals fill cavities in micrite matrix & some bryozoan support |
| Folk Classification |
Stromotactis cavities filled by radiaxial calcite spar in sparsely fosilliferous dense pelmicrite |
| Dunham Classification |
Stromotactis cavities filled by radiaxial calcite spar in sparsely fosilliferous dense pelpackstone |
| Common Grains |
Sparse bryzoan fronds and pelloids with cavities filled by radiaxial calcite spar lathes and internal cement |
| Sorting |
Poorly sorted |
| Rounding |
Poor rounding |
| Micritization & envelopes |
Grains are peloids or ooids and micrite envelopes |
| Cement & diagenetic fabric |
Complete replacement of pelloids and calcite by equant calcite |
| Porosity |
5% Leached Intrapartical |
| Depositional Setting |
Low energy shoal |
| Diagenetic history |
Early compaction and cementation of micrite & implacement of radiaxial cement |
Striking micrite supported cavities and fill by radiaxial calcite cement and internal sedimen on the floors of the canities. This latter sediment is now represented by crystals of calcite that appear to have undegone grain growth or the neomorphism of Folk.
Thursday, November 11, 2021