A vitrophyre is a porphyritic volcanic rock in which phenocrysts are embedded in a glassy matrix. Vitrophyres are contrasted from typical porphyritic rocks in that the latter has both crystalline phenocrysts (larger grains) and a crystalline matrix (smaller grains), whereas the former has a distinctly glassy matrix. [1] Vitrophyres can be alternatively described as rocks having vitrophyric texture. [2] This texture results from the rapid quenching of a lava where phenocrysts had started to form prior to eruption. [3]
A vitrophyre is a porphyritic volcanic rock in which phenocrysts are embedded in a glassy matrix. Vitrophyres are contrasted from typical porphyritic rocks in that the latter has both crystalline phenocrysts (larger grains) and a crystalline matrix (smaller grains), whereas the former has a distinctly glassy matrix. [1] Vitrophyres can be alternatively described as rocks having vitrophyric texture. [2] This texture results from the rapid quenching of a lava where phenocrysts had started to form prior to eruption. [3]