Volcanic beach sand, Devil's Island, Antarctica
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Devil's Island Unknown macro: {table-cell} |
Coarse beach sand |
Location |
Beach on Devil's Island, West Antarctica, (63°48'S, 057°17'W ; E. of James Ross Island) |
Depositional facies |
replace this with text about the dep facies |
Provenance |
Mafic to intermediary volcano |
Composition |
Pyroxene, hornblende, plagioclase, opaque ore minerals |
Texture |
Coarse sand (ca. 1500 µ), very poorly sorted, rounded |
Petrographic thin section:
Description |
In the bright field you can identify the olive green amphiboles and the black ore minerals. The translucent minerals in the dark field show coloures of first and second order; also the cleavability indicates clinopyroxenes |
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Bright field Unknown macro: {table-cell} |
Dark field |
Sample number |
heubeck0069 |
Collector |
Dr. Bernd Weber, Potsdam |
Date of sampling |
September 2005 |
Comments:
This beach sand is remarkable because of the predominance of physical weathering and the good preservation of chemically susceptible minerals
