Question

Which of the following is not considered as pyroclastic debris?

Answer 1

Answer:

Pyroclastic flows contain a high-density mix of hot lava blocks, pumice, ash and volcanic gas. They move at very high speed down volcanic slopes, typically following valleys.

Explanation:

Answer 2

Answer:

(D) Pahoehoe

Explanation:

Pahoehoe lava flows are described by smooth, lightly undulating, or broadly hummocky surfaces. The liquid lava running beneath a thin, still-plastic crust drags and twists it into tapestry-like folds and rolls relating twisted rope. Pahoehoe lava flows are maintained substantially wholly internally by rivers of liquid lava flowing beneath a fixed or partly solidified surface.