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
Beneath the Scars Beneath the Scars Beneath the Scars is the fourth studio album by the rock music group 12 Stones. It was released on May 22, 2012. The album was produced by Skidd Mills, who produced the band's previous album "Anthem for the Underdog". The album's first single "Bulletproof" was released on July 12, 2011. The second single "Worlds Collide" was released on February 7, 2012, followed by "Infected" on February 28, 2012. The release of "Beneath the Scars" was delayed several times. Originally titled "Only Human, "it was first scheduled for release on August 23, 2011 but then delayed to September