Carbonate sand, Plage de St. Jean, St. Barthelmy, Caribbean
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Plage de St. Jean, St. Barthelmy Unknown macro: {table-cell} |
Fragments of red algae |
Location |
Beach, Plage de St.Jean, St. Barthelmy, Caribbean |
Depositional facies |
replace this with text about the dep facies |
Provenance |
Diverse and typical mixture of carbonate fragments of marine provenance and some quite particular VRFs and MRFs of landward andesitic provenance |
Composition |
Dominant white carbonate sand (CaCO3, calcite and aragonite); few fractions of quartz, chlorite?, hornblende, fine grained and dark mafic rock fragments (Lv), intermediary plutonic fragments, black obsidian |
Texture |
Medium sand (ca. 350 µ), moderately sorted, subangular |
Petrographic thin section:
Description |
Characteristic "finger print" red algae, tubular serpulids, few benthic foraminifera, radial coralline sceletal fragments, angular echinoid plate |
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Bright field Unknown macro: {table-cell} |
Dark field |
Sample number |
heubeck0077 |
Collector |
Christoph Heubeck, Institut für Geologische Wissenschaften, FU Berlin |
Date of sampling |
2004 |
Comments:
Dominated by white, fine cristalline, porous coralline sceletal fragments (>90%), accessory transparent opaline sponge spiculae, fragments of bryozoa, few hyaline brown mollusca, large ovoid benthic foraminifera, angular echinoderm plates, rarely ostracoda, possibly plates from calcareous algae
