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