Volcanic
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litharenite, Conaripe, Chile
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Location:
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Conaripe, Lago Calafquen, South Chile;
low energetic beach of a former glacier lake
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Provenance:
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Volcanic lava
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Composition:
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Green and black obsidian, with embedded clinopyroxene and plagioclase; andesitic mikrolithes, ignimbrit;
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Foamy obsidian, glass bead is 200μ |
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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,
middle to coarse sand (250 bis 1250 μm)
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Sample Number:
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heubeck0097
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Collector:
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Christoph Heubeck, Institut für Geologische Wissenschaften, Freie Universität Berlin
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Date:
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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
