Whether an eruption will primarily produce lava flows or pyroclastic debris is influenced by the ____________.
A)viscosity of the lava
B)composition of the lava
C)proportion of volatiles within the lava
D)All of the above are correct.

Question

Quizplus · Accepted Answer

The viscosity, composition and proportion of volatiles within the lava all play a role in determining whether an eruption will primarily produce lava flows or pyroclastic debris. A highly viscous lava will tend to produce more pyroclastic debris, while a less viscous lava is more likely to result in lava flows. The composition of the lava can also influence whether it will produce more lava flows or pyroclastic debris, with more silica-rich lavas generally producing more explosive eruptions. Additionally, the proportion of gas and other volatiles within the lava can affect the type of eruption, as more gas-rich lavas are more likely to produce pyroclastic debris. Therefore, all of the factors mentioned are correct influences on the type of eruption that will occur.

Whether an Eruption Will Primarily Produce Lava Flows or Pyroclastic