What does the presence of vesicular basalts - rocks containing frozen-in remnants of gas bubbles - among the lunar rock samples show?
A)that the lunar surface was fragmented by meteorite impacts
B)that the crust must have been made of anorthosite
C)that molten lava once flowed over the lunar surface
D)that the Moon was once hit by a very large meteorite

Question

Quizplus · Accepted Answer

The presence of vesicular basalts among the lunar rock samples indicates that molten lava once flowed over the surface of the Moon, trapping gas bubbles that later froze into the rock. This is evidence of the volcanic activity that occurred on the Moon. Option A is incorrect because meteorite impacts are responsible for the fragmentation of the lunar rocks, not the presence of the vesicular basalts. Option B is incorrect because anorthosite is a type of rock that makes up the crust of the Moon, but it does not explain the presence of vesicular basalts. Option D is incorrect because there is no correlation between the presence of vesicular basalts and a large meteorite impact.

What Does the Presence of Vesicular Basalts - Rocks Containing