Glauconite Sand, offshore Chile
Pictures of sampling site and depositional facies
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Box corer in use | Macro |
Location |
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200 km offshore Concepcion, south central Chile, outer shelf, ca. 160 m water depth | |
Depositional facies |
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Outer shelf, ca. 160 km water depth | |
Provenance |
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Glauconitic fecal pellets (peloids) | |
Composition |
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Mainly glauconite, some phosphate | |
Texture | Well sorted, well rounded coarse-grained pellets. This is not really a natural sand because the grains were concentrated by washing and sieving from a muddy box corer sample |
Petrographic thin section:
Pictures of thin sections
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Texture:
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Texture of the grains, ecc.
Sample number | Collector | Date of sampling |
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Comments:
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Description | Glauconitic fecal pellets with a phosphatic rind. The bottle-green color and the granular texture is a strong indicator for glauconite; the pleochroic wood-brown rind indicates the presence of phosphate. |
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Bright field | Dark field |
Sample number | heubeck0025 |
Collector | Christoph Heubeck, Institut für Geologische Wissenschaften, FU Berlin |
Date of sampling | Dec. 2001 |
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Comments:
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This is not really a natural sand because the grains were concentrated by washing and sieving from a muddy box corer sample
Additional data pageFurther comments on the sand, depositional history, ecc.
