Exam 9: The Wrath of Vulcan: Volcanic Eruptions

The textural term for a basaltic lava flow that has a smooth,ropy appearance is ________.

The largest known volcanic eruption in the last million years occurred at ________.

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

Olympus Mons,the largest known volcano in our Solar System,is found on ________.

A mixture of air,hot ash,and pumice lapilli that rushes down the side of a volcano in a scalding avalanche is termed a(n)________.

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 ________.

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

Which of the following is NOT true? Phreatic eruptions ________.

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

Whether an eruption will primarily produce lava flows or pyroclastic debris is NOT influenced by the ________ the source magma.

A volcanic eruption that is emitted from the sides of a volcano is termed a(n)________ eruption.

Basaltic lavas ________.

Mt.Fuji in Japan is an example of a ________.

Columnar joints form when ________.

The tall polygonal features preserved in the ancient basalt flow in the image below formed because the lava ________.

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

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

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

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

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