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 Boardwalk Beneath the Boardwalk Beneath the Boardwalk refers to an unofficial collection of 18 demo recordings by Sheffield band Arctic Monkeys which was burned onto CDs to give away at the band's gigs for free, and which emerged on the Internet in 2004, promptly file-shared amongst fans. The name "Beneath the Boardwalk" originated when the first batch of demos were sent around on the Internet. The first sender, wanting to classify the demos, named them after the club where he received them, the Boardwalk in Sheffield — a since defunct venue where the Arctic Monkeys used to play gigs and Alex