Geology of the Rocky Mountains Japan, Indonesia and the Aleutians; others are fragments of oceanic crust obducted onto the continental margin while others represent small isolated mid-oceanic islands. Magma generated above the subducting slab rose into the North American continental crust about inland. Great arc-shaped volcanic mountain ranges, known as the Sierran Arc, grew as lava and ash spewed out of dozens of individual volcanoes. Beneath the surface, great masses of molten rock were injected and hardened in place. For 270 million years, the effects of plate collisions were focused very near the edge of the North American plate boundary, far to the west of
Journey to the Center of the Earth (1959 film) Journey to the Center of the Earth (1959 film) Journey to the Center of the Earth (also called Jules Verne's Journey to the Center of the Earth) is a 1959 adventure film adapted by Charles Brackett from the novel of the same name by Jules Verne. "Journey to the Center of the Earth" was directed by Henry Levin and stars James Mason, Pat Boone and Arlene Dahl. In Edinburgh, Scotland, in 1880, Professor Sir Oliver Lindenbrook (James Mason), a geologist at the University of Edinburgh, is given a piece of volcanic rock by his admiring student, Alec McEwan (Pat Boone).