Microscopic

Beach Rock - Composed of Grapestones but Cemented by Calcite (Int/4/Hol/bah)

10x
2.5x
5x
5x
Outstanding feature Intraclasts cemented by micrite & sparse thin low magnesian calcite meniscus cements
Folk Classification Porous intramicrite & sparse calcite meniscus cement at grain contacts
Dunham Classification Porous intraclastic packstone with sparse meniscus calcite cements
Common Grains Intraclasts and peloids
Sorting Moderate
Rounding Slightly
Micritization & envelopes Common micrite cements and micritization
Cement & diagenetic fabric Intraclasts cemented by micrite & sparse thin low magnesian calcite meniscus cement
Porosity 35% Intraparticle porosity
Depositional Setting Beach along the margin of tidal creek
Diagenetic history Early cementation by micrite & sparse thin low magnesian calcite meniscus cement penecontemperaneous with deposition

Depsited as a carbonate sand in the intertidal zone along the margins of a tidal creek. Early cementation by micrite & sparse thin low magnesian calcite meniscus cement penecontemperaneous with deposition.


Monday, August 27, 2018
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