________ is a vesicular rock with an andesitic or rhyolitic composition.
A) Scoria
B) Pumice
C) Obsidian
D) Granite
Question 2
A cooling of surface ocean waters in the eastern equatorial Pacific Ocean is known specifically as ________.
A) La Nia
B) the ENSO effect
C) El Nio
D) Antarctic bottom water
E) the Little Ice Age