Individual layers of basalt lava may be divided into vertical columns called ______.
A) pahoehoe
B) columnar basalt
C) pillow structure
D) collapse structure
E) tuff

Question

Quizplus · Accepted Answer

Individual layers of basalt lava cool and contract, causing them to fracture into vertical columns. These columns are called columnar basalt. The other choices are related to different types of volcanic features or structures.

Individual Layers of Basalt Lava May Be Divided into Vertical