Which of the following igneous rock always has a pyroclastic texture?
A) intrusive granite pluton
B) rhyolitic tuff
C) porphyritic basalt flow
D) andesitic lava flow

Question

Quizplus · Accepted Answer

Rhyolitic tuff is composed of volcanic ash and fragments ejected during explosive volcanic eruptions, which solidify into a pyroclastic texture. This texture is characterized by a mixture of fine-grained ash and larger volcanic fragments, distinguishing it from the textures found in intrusive or extrusive igneous rocks that cool from magma or lava without involving explosive fragmentation.

Which of the Following Igneous Rock Always Has a Pyroclastic