Microscopic

Dolomite - Calcite Remnants - Dead Oil ( Dol-/8/Olig/Iran )

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Outstanding feature Crystalline dolomite mozaic, fossil remnants & intercrystalline porosity. Dead oil.
Folk Classification Dolomitized biosparite
Dunham Classification Dolomitized bioclastic packstone
Common Grains Dolomite rhombs and fossil fragments
Sorting Unknown, bimodal crystal size
Rounding Fossils show rounding, angular rhombs
Micritization & envelopes Some
Cement & diagenetic fabric Almost complete replacement of original fabric by dolomite
Porosity 15% Intercrystalline & dead oil in pores
Depositional Setting Higher energy shoal
Diagenetic history Dolomitization of bioclastic fabric
Striking intercrystalline porosity (now filled by blue epoxy and dead oil) and fragments of original bioclastic grains.

Friday, March 27, 2020
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