...
mafic to intermediary volcano
Composition:
|
Coarse beach sand |
Pyroxene, hornblende, plagioclase, opaque ore minerals
|
Coarse beach sand |
Petrographic thin section:
...
...
...
Bright field
...
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 | Dark field |
Texture:
Coarse sand (ca. 1500 µ), very poorly sorted, rounded
...
