Which of the following extrusive igneous rocks would have the highest quartz content: A. basalt B. andesite C. obsidian D. rhyolite E. pumice 40.
(A.; basalt; B. andesite C. obsidian D. rhyolite E. pumice 40)
A.
basalt
B. andesite C. obsidian D. rhyolite E. pumice 40