S
cience
H
istory
A
rt &
L
iterature
G
IS &
M
apping
L
ibrary
C
hat
R
oom
S
earch
T
rail
H
ead
B
ase
C
amp
In This Section...
Introduction
Ancient Landscapes
Pangea
Regional Geology
Canyon Lands
Three Deserts
Volcanoes
Volcanoes
The four main types of volcanoes
Questions and Answers about Volcanoes from the USGS
Active volcanoes around the world
Recently Active Volcanoes in the Western United States
Recently Active Volcanoes in Mexico
What is a Volcanologist ?
