The West Coast of the United States is home to two of the nation's most iconic mountain ranges: the Sierra Nevada and the Cascades. While both of these places boast innumerable natural charms, there ...

Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern California, looms above Little Glass Mountain, a thick obsidian flow erupted from the Medicine Lake shield volcano about 1,000 years ...

New research offers clues as to why Mount St. Helens is one of the most explosive volcanoes in the Cascade range and why it stands apart from the chain of other Cascade volcanoes. Scientists from the ...

Our western volcanoes : an overview -- Plates in motion : the ring of fire, hot spots, and supereruptions -- Magma and mountains : how volcanoes erupt and the landforms they build -- Glaciers on ...

At the risk of this blog becoming all volcanoes, all the time, I bring you... more volcanoes! Two of my favorite geobloggers wrote mustn't-miss posts on some of our Cascades volcanoes. They showcase ...

The eruption of a Hawaii volcano has people warily eyeing volcanic peaks on America's West Coast. The West Coast is home to an 800-mile (1,300-kilometer) chain of 13 volcanoes from Washington state's ...

A vast underground reservoir buried in the Oregon Cascades holds more than twice the water of Lake Mead. The discovery points to a hidden network of water circulating deep within volcanic rock across ...

Add Yahoo as a preferred source to see more of our stories on Google. Smoke billows from the mouth of Mt. Shasta like a thunderous cough. Within moments, clear skies turn gray, and the sun vanishes ...