Mafic-plutonic sand, Antofagasta, Chile
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Sample area | Macro |
Location |
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North Chile, end of road along coast approx. 10 km south of Antofagasta |
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Depositional facies | Coast |
Provenance |
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Gabbroid rocks on western slope of the Cerro Coloso |
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Composition |
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White plagioclase, black hornblende, absence of quartz |
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Texture |
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Coarse sand, poorly sorted, almost not transported detritus |
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Petrographic thin section:
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Description | insert here short description of thin section |
insert here a bright field image |
| insert here a dark field image |
Bright field | Dark field |
Sample number |
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Sample Number:
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heubeck0128 - SA16 | |
Collector |
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Christoph Heubeck, Institut für Geologische Wissenschaften, FU Berlin | |
Date |
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of sampling | 2005 |
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Comments:
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The Cerro Coloso is a "core complex" of mafic, plutonic rocks. They are found at > 1000 m on top of the cliff. The slope is described as an "angle of repose" and is covered by salt incrusted gravel and dune sands.
