Glauconite Sand, offshore Chile
Pictures of sampling site and depositional facies
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Location:
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Location of sample, geographic area
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Depositional facies:
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Facies/area of deposition
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Provenance:
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Provenance of the sand, description of sedimentation route....
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Composition:
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Composition of the sand, mineralogy, ecc.
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Petrographic thin section:
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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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Box corer in use | Macro |
Location | 200 km offshore Concepcion, south central Chile, outer shelf, ca. 160 m water depth |
Depositional facies | Outer shelf, ca. 160 km water depth |
Provenance | Glauconitic fecal pellets (peloids) |
Composition | 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 |
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Petrographic thin section:
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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.