Beach Rock - Composed of Grapestones but Cemented by Calcite (Int/4/Hol/bah)
| 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.
Thursday, November 11, 2021