Final answer:
The rock sample shown below is called rhyolite. It is a felsic, extrusive igneous rock with a finely crystalline texture and a light gray to pinkish color.
Step-by-step explanation:
The rock sample shown below is rhyolite. Rhyolite is a felsic, extrusive igneous rock that is finely crystalline (aphanitic texture) due to cooling of high-viscosity lava. It is often light gray to pinkish to somewhat reddish in color. Rhyolite lavas are highly viscous when erupted and often appear as if they have flowed like oozing toothpaste.