Long troughs at the edges of the Moon's maria where parts of the surface have descended are
A) rilles.
B) wrinkle ridges.
C) graben.
D) mascons.

Question

Quizplus · Accepted Answer

Graben are features formed by the downward displacement of a block of the planet's crust between two faults or by the extensional forces in the crust. On the Moon, they are observed as long troughs at the edges of the maria, where parts of the lunar surface have descended, fitting the description provided.

Long Troughs at the Edges of the Moon's Maria Where