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Beach
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sand,
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Big
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Island,
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Hawaii,
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USA
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Onekahakaha Beach Park (Hilo) | Macro |
Location | Hilo, Onekahakaha Beach Park, Big Island, Hawaii, USA |
Depositional facies | medium to high energy beach |
Provenance | local mixture of offshore bivalve shells and mafic lava |
Composition | Aragonitic (calcite ?) and phosphatic shell fragments; basaltic VRFs |
Texture | poorly sorted, subrounded, white, brownish to red, dark gray to black, medium to coarse sand (250 to 1250 μm) |
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Petrographic thin section:
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Description | Grobkörnige, karbonatische, z.T. phosphoritische ("hozbraune") Schalenfragmente, z.T. mit deutlichen Wachstumsrippen. Ein auffälliges, im Hellfeld transparentes Olivinkorn mit hellgrünen Interferenzfarben; einige schwarze (aphanitische) feinkörnige-glasige Fragmente basaltischer Lava |
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Bright field | Dark field |
Sample number | heubeck0013 |
Collector | Christoph Heubeck, Institut für Geologische Wissenschaften, FU Berlin |
Date of sampling | 1993 |
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Comments:
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replace this text with further comments about the sand ecc.
