Author Question: Pyroclastic flows are dangerous because they ____. a. contain poisonous sulfur compounds b. ... (Read 150 times)

rachel9 · **on:** Jul 13, 2018

Pyroclastic flows are dangerous because they ____.
a. contain poisonous sulfur compounds
b. cause magma chamber collapse
c. move very fast, and extend a long distance
d. move very fast over a short distance
e. move at unpredictable speeds

Question 2

Pumice is ____.
a. created in explosive eruptions involving viscous magma and high amounts of volatiles
b. the solidified form of a lahar that has reached the sea
c. compacted volcanic ash
d. clinkers of basalt formed in slow lava flows
e. created in slow eruptions involving fluid magma and low amounts of volatiles