_____ are tunnel-like caves within a lava flow.
A) Pores
B) Vesicles
C) Lava tubes
D) Lava pipes
E) Calderas

Question

Quizplus · Accepted Answer

Lava tubes are tunnels formed within a lava flow when the outer part of the flow solidifies and insulates the still-flowing molten lava inside. Pores and vesicles are voids within the rock, but they do not necessarily form tunnel-like structures within a lava flow. Lava pipes and calderas are also features associated with volcanic activity, but they do not refer specifically to tunnel-like caves within a lava flow.

_____ Are Tunnel-Like Caves Within a Lava Flow