Altered Andesite

3D Model

Description: Porphyritic andesite with pervasive plagioclase alteration. The vesicular aspect is given by a deep alteration in the external layer of the rock. Note that there are three stages of visible alteration, a very strong one (with rectangular holes by the old plagioclases) another with medium alteration (plagioclases are still visible, but with an orange aspect) and finally a fresh side, with the original texture of the rock.

Size: 17 x 13 x 7 cm