America's volcanic past - volcanic highlights and features

http://vulcan.wr.usgs.gov/LivingWith/VolcanicPast/

Links to volcanism, volcanic history, volcanic rocks, and general geology by state, by region, national parks and national monuments and a brief introduction to volcanism around the U.S. entitled: Windows into the past.

by Cascades Volcano Observatory (Sponsor)
Related topics:
Geologic history, Hazards, Symbiosis, Volcanic activity, Volcanic rocks, Volcanology
States or counties
United States
Alternative formats of this information:
Compatible standard Format
FGDC-CSDGM Text XML JSON
CCM of Project Open Data JSON
ISO 19115 XML