Approximately 12 million years ago, a massive volcano in the southwestern corner of Idaho erupted and spread a tremendous blanket of ash over a large area. Much of this ash settled over the grasslands of northeastern...

The British Geological Survey (BGS) has a wealth of information about the earth sciences, and they are quite willing to share it with others. This page contains information and resources for anyone interested in geology...

This is the homepage of the United States Geological Survey's (USGS) Cascades Volcano Observatory (CVO). The site features news and events, updates on current activity of Cascade Range volcanoes, and information...

At Craters of the Moon National Monument and Preserve visitors can explore cinder cones, lava tubes, lava flows, and other volcanic features. Craters of the Moon is run by the National Park Service and offers a variety...

For hundreds of thousands of years, lava flows have created intricate patterns on the slopes of Hawaii's Mauna Loa volcano. Until the mid-1970s, it was impossible to know when each of the flows occurred. However, as this...