The potential scale of such an eruption could spew out enough ash to not only blanket the surface of much of North America but also block sunlight and cause multi-year global volcanic winter ...

The region forms part of the Cascade Range, named for its innumerable ... Over the eons a series of islands floated on their plate toward North America. About a hundred million years ago, the ...

A snowmobiler died Friday and another rider was injured in a large slab avalanche in the North Cascades, according to the ...

The Cascade Range contains an array of volcanoes ... of the slow slide of dense oceanic crust as it sinks beneath North America (subduction), which releases water and melts overlying rock ...