Microscopic

Mid Intertidal Crust - Source of Grapestones (Int/3/Hol/AbuD)

10x
2.5x
2.5x
2.5x
2.5x
5x
5x
5x
5x
5x
10x wave plate
2.5 wave plate
5x wave plate
Outstanding feature Mix of peloids, intraclasts & bioclasts
Folk Classification Porous pel intramicrite
Dunham Classification Porous pel intraclastic packstone
Common Grains Peloids, grapestones & bioclasts
Sorting Moderate to poor
Rounding Grains commonly rounded
Micritization & envelopes Grains commonly micritized
Cement & diagenetic fabric Cemented by micrite
Porosity 30% intraparticle
Depositional Setting Interitdal sediment surface crust
Diagenetic history Alteration and cementation by micrite

Surface "hardground" crust from the seaward margin of the algal flats of the Khor Al Bazam


Thursday, August 15, 2019
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