Volcanoes - Geology Worksheet (Page 2 of 4) in pdf

Volcanoes - Geology Worksheet Page 2

Physical Geology 101

Which flood basalt event happened about 16 million years ago in the Pacific NW?

____________________________________________

Types of Eruptions

The two types of eruptions are ______________________ and ____________________.

Nonexplosive Eruptions

What location typically experiences nonexplosive eruptions? _________________

What is the largest volcano on Earth? _____________________

What are the viscosity and silica content characteristics of lava that generally produces nonexplosive eruptions?

Viscosity:

HIGH or

LOW ?

Silica content:

HIGH or

LOW ?

What type of lava would have these characteristics? ______________________

Gases spattering out of a volcanic vent produce a ____________________.

The most active volcano on Earth is __________________, with >50 eruptions since 1823.

Mafic lava that erupts nonexplosively can flow great distances, and eventually builds up a type of volcano called

a _____________________.

Such volcanoes typically have very wide bases and gently sloping sides.

Examples of shield volcano locations:

___________________

____________________ ____________________..

Where are fissure eruptions common (also nonexplosive)?

______________________

Explosive Eruptions

What are the viscosity and silica content characteristics of lava that generally produces explosive eruptions?

Viscosity:

HIGH or

LOW ?

Silica content:

HIGH or

LOW ?

What type of lava would have these characteristics? ___________________________

Volcanoes - Geology Worksheet Page 2