Whether an eruption will primarily produce lava flows or pyroclastic debris is NOT influenced by the ________ the source magma.
A)viscosity of
B)composition of
C)proportion of volatiles within
D)depth and residence time of

Question

Quizplus · Accepted Answer

The depth and residence time of the source magma may affect the viscosity and volatile content, which would influence the type of eruption. However, whether the eruption primarily produces lava flows or pyroclastic debris is primarily determined by the type of volcano (shield, stratovolcano, etc.) and the style of eruption (effusive or explosive), which are both determined by the geological setting and tectonic environment surrounding the volcano.

Whether an Eruption Will Primarily Produce Lava Flows or Pyroclastic