Pyroclastic igneous rock forms from ____.
A)explosive volcanic activity
B)rapidly cooling plutons
C)viscous lava flows
D)basalt and gabbro
E)melting of country rock

Question

Quizplus · Accepted Answer

Pyroclastic igneous rock forms from explosive volcanic activity, which blasts ash, tephra, pumice, and other volcanic materials into the air. These materials then cool and solidify to form pyroclastic rocks such as tuff and welded tuff.

Pyroclastic Igneous Rock Forms from ____