Exam 7: Volcano Processes and Deadly Events

In August 1986,a gigantic volume of carbon dioxide gas belched forth from ____________ and swept down the adjacent valleys asphyxiating 1700 people.

The radiocarbon process of documenting major eruption dates for volcanoes in the past 50,000 years or so is the same as that used to work out dates of major prehistoric earthquakes.

Mt.Rainier,Washington,is number one on the danger list of many volcanologists because of ____________.

The most dangerous volcanoes tend to be in the same general plate tectonic settings as the largest earthquakes in the world.

The jokulhaup that occurred in 1996 in Iceland _______________________.

A genuine success story of advance warning before a large eruption occurred in the Philippines in 1991 before the climactic eruption of _________________.

Pyroclastic flows can travel across bodies of water.

Magma at spreading centers is low-temperature,low-viscosity,and basaltic,with easy escape of gases,providing all the factors that promote the peaceful eruption of magma.

In 1985,this volcano produced a minor eruption that melted part of a glacier near its summit,sending a lahar down its slopes and killing at least 22,000 people:

Violent causes of death from volcanic eruptions include _______________.

In 1883,this volcano exploded and the resulting tsunami killed 36,000 people on Java and Sumatra.

The eruption of Nevado del Ruiz in Columbia in 1985 dropped hot pyroclastic debris onto glaciers,resulting in lahars.

Nuee ardente (French for glowing cloud)is another term used to describe a lava flow.

During the summer of 1783,the greatest lava eruption of historic times poured forth at _________,accompanied by the release of an enormous volume of gases that enshrouded much of northern Europe in a "dry fog" or blue haze rich in SO₂ (one of the visible components of today's urban smog).