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
The Uninhabitable Earth percent chance that we’ve set off a chain reaction that could end the human race, then that should be something that the public knows and thinks about." The Uninhabitable Earth The Uninhabitable Earth is a "New York" magazine article by American journalist David Wallace-Wells published on July 9, 2017. The long-form article depicts a worst-case scenario of what might happen in the near-future due to global warming. The article starts with the statement "[i]f your anxiety about global warming is dominated by fears of sea-level rise, you are barely scratching the surface of what terrors are possible." According to David