An igneous rock with a mixed texture of coarse grains (phenocrysts)surrounded by fine crystals (groundmass)is termed ____________.
A)porphyritic
B)phaneritic
C)aphanitic
D)necrotic

Question

Quizplus · Accepted Answer

Porphyritic texture refers to a mix of large crystals (phenocrysts) surrounded by finer-grained crystals (groundmass). Phaneritic texture refers to coarse-grained rocks without a mix of crystal sizes. Aphanitic texture refers to fine-grained rocks without any visible crystals. Necrotic is not a geologic term.

An Igneous Rock with a Mixed Texture of Coarse Grains