Most of the igneous rocks within oceanic abyssal plains are ____________.
A)exposed at the surface of the sea floor
B)covered by sand and gravel introduced by rivers at deltas
C)covered by clay and the skeletal remains of microplankton
D)covered by limestones made up of the fragments of large invertebrate shells

Question

Quizplus · Accepted Answer

Most of the igneous rocks within oceanic abyssal plains are covered by sediment composed of clay minerals and the skeletal remains of microscopic planktonic organisms. This sediment accumulates slowly over time and covers the igneous basement rock on the ocean floor.

Most of the Igneous Rocks Within Oceanic Abyssal Plains Are