Stock Photo - Andesite is a volcanic or extrusive rock with aphanitic or porphyritic texture. Is an intermediate rock betwen basalt and dacite. Columnar disjunction. Cabo de Gata, Almeria, Andalusia, Spain.

Stock Photo: Andesite is a volcanic or extrusive rock with aphanitic or porphyritic texture. Is an intermediate rock betwen basalt and dacite. Columnar disjunction.

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