Exam 5: The Wrath of Vulcan: Volcanic Eruptions

Iceland rises above the Atlantic Ocean as a result of ____________.

Ash,cinders,and blocks are all types of ____________.

As compared to subaerial basaltic lavas,submarine basaltic lavas differ in that they ____________.

Olympus Mons,the largest known volcano in the Universe,is found on ___________.

A fast-moving flow consisting of a mixture of water and volcaniclastic debris is termed a ____________.

One of the reasons volcanic eruptions are so deadly is that there is no way to predict where an eruption will occur in the near future.

The Hawaiian island chain is an example of a(n)____________.

All volcanic eruptions pass through the crater at the volcanic summit.

Pelé's hair ____________.

Explosive or voluminous eruptions may cause the volcano to collapse on the floor of the (now empty)magma chamber,producing a broad depression termed a ___________.

Most terrestrial volcanic glass ____________.

The hot-spot track associated with the Hawaiian Islands and Emperor Seamounts ____________.

The eruption of Mt.St.Helens in 1980 was the greatest explosive eruption in the last two hundred years of world data.

Of the three primary forms of subaerial volcanoes,____________ are sometimes referred to as "composite volcanoes."

At continental rifts,vast bodies of basaltic lava flow forth from fissures,forming ____________.

In 79 C.E.,the citizens of Pompeii in the Roman Empire were buried by pyroclastic debris derived from an eruption of ____________.

Whether an eruption will primarily produce lava flows or pyroclastic debris is influenced by ____________.

Basaltic lavas that solidify at the surface before flow ceases fracture irregularly,producing a sharp-surfaced lava rock named ____________.

The smoky cloud that rises from the vent of an actively erupting volcano is composed of ____________.

Pahoehoe ____________.