This dark gray igneous rock is glassy and elsewhere contains small vesicles and flow bands. What type of rock is this?

A. basalt
B. volcanic breccia
C. rhyolite or obsidian
D. welded tuff


Answer: C

Environmental & Atmospheric Sciences

You might also like to view...

Natural selection refers to the survival of organisms that are best adapted to their environment

a. True b. False

Environmental & Atmospheric Sciences

The plates involved in plate tectonics are part of Earth’s lithosphere.?

a. True b. False

Environmental & Atmospheric Sciences

What factors are necessary in order for a karst landscape to form?

Environmental & Atmospheric Sciences

The closest resemblance to a unified Europe was the Roman Empire, which was held together by _____________________.

-trade networks -transportation systems -military force -a common religion -a common culture

Environmental & Atmospheric Sciences