Exam 9: The Wrath of Vulcan: Volcanic Eruptions

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

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

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

rWhat signs do scientists look for when predicting volcanic eruptions?

The eruption of Mt.St.Helens in 1980 was the greatest explosive eruption in the last 200 years of world data.

Pillow lavas are associated with ____________.

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

What was unusual about the 1986 disaster around Lake Nyos in Cameroon?

Rhyolitic lavas ____________.

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

Which national park is home to a large volcanic caldera formed through a very large explosive eruption 640,000 years ago?

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

Large-scale volcanic eruptions can cause a drop in global temperatures.

The greatest hazard to human life associated with volcanoes is ____________.

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

Columnar jointing is a type of fracturing that occurs in andesitic and rhyolitic lava flows.

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

Of the three primary forms of subaerial volcanoes,____________ consist of alternating layers of tephra and solidified lava.

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

The characteristic "rotten egg" smell of many active volcanoes is derived from ____________.