Volcanic beach sand, Devil's Island, Antarctica
|
||
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 |
|
||
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
replace this text with link to daughter page (Additional data page)