Microscopic

Neomorphosed Carbonate ( N/16/? )

2.5x
5x
Outstanding feature Fine grained calcite crystals replace micrite matrix
Folk Classification Sparsely Fosilliferous Porous Pelmicrite
Dunham Classification Sparsely Fosilliferous Porous Pelpackstone
Common Grains Pelloids or Calcite lathes from broken bioclasts
Sorting poorly sorted
Rounding rounded
Micritization & envelopes Grains are peloids or ooids and micrite envelopes
Cement & diagenetic fabric Complete replacement of pelloids and calcite by dolomite
Porosity 5% Leached Intrapartical
Depositional Setting Low energy shoal
Diagenetic history Recrystallized micrite & leached fossil bioclasts
Striking recrystallization of micrite with mozaic and seperate clear equant authogenic calcite. This is the grain growth or neomorphism of Folk. Note broken calcite lathes from bioclastic fragments, their sparse leached remanents and the leached empty pore spaces that pseodomorph them and are now filled by blue stained epoxey.

Thursday, November 11, 2021
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