As compared to subaerial basaltic lavas,submarine basaltic lavas differ in that they ________.
A) produce violent pyroclastic debris flows
B) produce large crystals of pyroxene and plagioclase
C) form pillow-like mounds because they cannot flow as far from their source
D) form long but irregular sheets of a'a'

Question

Quizplus · Accepted Answer

Submarine basaltic lavas form pillow-like mounds because they cannot flow as far from their source before solidifying due to the cooling effect of water. Subaerial basaltic lavas, on the other hand, can flow much farther and can form long but irregular sheets of a'a'. Option A is incorrect as submarine basaltic lavas do not produce pyroclastic debris flows. Option B is incorrect as large crystals are not typically formed in basaltic lavas.

As Compared to Subaerial Basaltic Lavas,submarine Basaltic Lavas Differ in That