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h5. Volcanic litharenite, Conaripe, |
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| Foamy obsidian, glass bead is 200μ |
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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; PRF's: plagioclase, ortho-/clinopyroxene (Gabbro); monocrystalline quartz; SRF: Aragonit (Ooid)
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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 to 1250 μm)
Sample number | Collector | Date of sampling |
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heubeck0097 | Christoph Heubeck, Institut für Geologische Wissenschaften, FU Berlin | January 2005 |
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Comments:
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Chile
| !0097_scenery_1200.jpg|thumbnail! | | !Conaripe_makro_1700.jpg|thumbnail! |
| Lago Calafquen \\
{table-cell:width=30%}
{table-cell} | Foamy obsidian, glass bead is 200μ |
| *Location* \\ | Conaripe, Lago Calafquen, South Chile |
| *Depositional facies* \\ | low energetic beach of a former glacier lake |
| *Provenance* \\ | Volcanic lava |
| *Composition* \\ | Green and black obsidian, with embedded clinopyroxene and plagioclase; andesitic mikrolithes, ignimbrite; PRF's: plagioclase, ortho-/clinopyroxene (gabbro); monocrystalline quartz; SRF: aragonite (ooid) |
| *Texture* | Immature, poorly sorted, poorly rounded (angular), light grey to black, hyaline and dull surfaces, medium to coarse sand (250 to 1250 μm) |
h6. Petrographic thin section:
| *Description* | _insert here short description of thin section_ |
| !0097_Conaripe_ths_II_1700.jpg|thumbnail! | | !0097_Conaripe_ths_X_1800.jpg|thumbnail! |
| Bright field {table-cell:width=30%}
{table-cell}| Dark field |
| *Sample number* | heubeck0097 |
| *Collector* | Christoph Heubeck, Institut für Geologische Wissenschaften, FU Berlin |
| *Date of sampling* | January 2005 |
h6. Comments:
Composition is similar to Black Sand Beach (Hawaii, [Black Sand Beach, Hawaii|geowisssand:0085 Black Sand Beach, Big Island, Hawaii, USA]), but with less obsidian and additonal PRF's
[Additional data page|geowisssand:0097 Additional data]
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