Volcanic litharenite, Conaripe, Chile
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Lago Calafquen |
| | Foamy obsidian, glass bead is 200μ |
Location |
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Conaripe, Lago Calafquen, South Chile |
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Depositional facies | low energetic beach of a former glacier lake |
Provenance |
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Volcanic lava | |
Composition |
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Green and black obsidian, with embedded clinopyroxene and plagioclase; andesitic mikrolithes, |
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ignimbrite; PRF's: plagioclase, ortho-/clinopyroxene ( |
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gabbro); monocrystalline quartz; SRF: |
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aragonite ( |
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ooid) |
Texture |
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Petrographic thin section:
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|---|---|---|
Bright field |
| Dark Field |
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Texture:
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Immature, poorly sorted, poorly rounded (angular), light grey to black, hyaline and dull surfaces, |
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medium to coarse sand (250 to 1250 μm) |
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Petrographic thin section:
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Description | insert here short description of thin section |
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Bright field | Dark field |
Sample number | heubeck0097 | |
Collector | ||
Sample number | Collector | Date of sampling |
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heubeck0097 | Christoph Heubeck, Institut für Geologische Wissenschaften, FU Berlin | |
Date of sampling | January 2005 |
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Comments:
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Composition is similar to Black Sand Beach (, Hawaii), but with less obsidian and additonal PRF's
