Microscopic

Grapestones Composed of Squished Peloids (Int/23/Pm)

2.5x
5x
5x
5x
2.5 wave plate
Outstanding feature Pellets & grapestones in micrite matrex
Folk Classification Intra-dismicrite
Dunham Classification Intraclastic wackestone
Common Grains Grapestone, peloids & fossil fragments
Sorting Poor
Rounding Poor to well rounded
Micritization & envelopes Intense micritization of grains
Cement & diagenetic fabric Micrite with equant in voids
Porosity Leached 1%
Depositional Setting Low energy shoal or lagoon
Diagenetic history Probable freshwater diagenesis with high Ca/Mg ratio

Neat ghosts of grapestones in micrite matrex just back from the margin of the Capitan Reef (Bank edge)!!! Clacite spar stained with alizarin red.


Thursday, August 15, 2019
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