Mystery of Why Mount St. Helens Is Out of Line With Other Volcanoes Solved
Some of the clearest, most comprehensive images of the top several miles of the Earth’s crust have helped scientists solve the mystery of why Mount St. Helens is located outside the main line of the Cascade Arc of volcanoes. A giant subsurface rock formation some 20-30 miles in diameter, known as the Spirit Lake batholith, ...
