Microscopic

Cemented Grapestone - Some Botryoidal Grains & Ooids (Int/2/Hol/Bah)

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5x wave plate
Outstanding feature Intraclastic porous grapestone
Folk Classification Porous ooid intramicrite
Dunham Classification Porous intraclastic packstone
Common Grains Grapestones, superficial ooids, & bioclasts
Sorting Poor
Rounding Poor
Micritization & envelopes Micritization is binding the grains
Cement & diagenetic fabric Micritization is binding the grains
Porosity 30% intraparticle
Depositional Setting Moderate energy tidal channel
Diagenetic history Micritization & cementation on sea floor

This sample is from a tidal channel which shows early cementation on it floor. The sample is being cemented by micrite and some of the grains are being micritized.


Thursday, August 15, 2019
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