Exam 9: The Wrath of Vulcan: Volcanic Eruptions

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

Hot-spot volcanoes ____________.

Hawaiian-style effusive eruptions are a greater threat to property than to human life.

Phreatomagmatic eruptions are ____________.

The lithification of material from a pyroclastic flow forms a rock called ____________.

Of the three primary forms of subaerial volcanoes,____________ are the largest in area.

The Columbia River Plateau is an example of a ____________.

Nonviolent eruptions characterized by extensive flows of basaltic lava are termed ____________.

Of the three primary forms of subaerial volcanoes,____________ have the most gently sloping sides,due to the low viscosity of the basaltic lavas that form them.

Gases that are abundantly emitted by volcanoes include ____________.

Mt.St.Helens killed a geologist studying the volcano because ____________.

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 ____________.

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

Pele's hair ____________.

Mafic magmas are distinguished by ____________.

Olympus Mons,the largest known volcano in the Universe,is an example of a _____________.

Phreatomagmatic eruptions take place when ____________.

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

In 1902,a famous,deadly volcaniclastic flow killed thousands of people on the Caribbean island of ____________.

Pahoehoe ____________.