Other rocks (also refer to the notes for igneous rocks) Mafic extrusive igneous rock: basalt Intermediate extrusive igneous rock: andesite Felsic/sialic extrusive igneous rock: rhyolite Textures of volcanic rocks Glassy texture: obsidian Pumice : glassy rock made mostly of gas bubbles, making it look almost like a solidified froth or foam Aphanitic : very fine-grained crystalline texture Porphyritic-aphanitic : some larger crystals (phenocrysts) embedded in an aphanitic ground mass or matrix Vesicular : rock with round or oval cavities due to the presence of gas bubbles when the rock was crystallizing.
(Other rocks; refer; to the notes for igneous rocks) (some larger crystals; embedded; in an aphanitic ground mass) (glassy rock; made; ) (the rock; was crystallizing; )
Other rocks some larger crystals glassy rock the rock
refer embedded made was crystallizing
to the notes for igneous rocks
in an aphanitic ground mass