Mount McLoughlin, Oregon, USA
U.S. Bureau of Land Management photo by Terry Tuttle (fair use policy)
Mount McLoughlin got its name in 1905 when the state legislature honored John McLoughlin, often called the father of Oregon. Before that it was known as Mount Pitt. A fairly young volcano, it is dormant now and hasn't erupted for about 25,000 years. Since then, glaciers have torn away the left (northeast) side of the mountain, and the solid lava guts that once fed its eruptions are now revealed.
McLoughlin belongs to the Cascade Range, a long chain of volcanic structures that mark where subducted crust of the Juan de Fuca plate creates magma during its descent. Read more about how subduction makes volcanoes here.
