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
Negadon: The Monster from Mars Negadon: The Monster from Mars In the year 2025, Earth sends an expedition to Mars in the spaceship "Izanami". A huge rock formation is discovered beneath the surface, and is transported back to earth. On the way back, the rock's temperature soars, causing the "Izanami" to explode and crash-land in Tokyo, leaving a large crater. The rock hatches into a colossal alien life form, which proceeds to attack Japan with bolts of energy from its many appendages and orifices. Missiles, tanks, and aircraft all attack but fail to destroy Negadon (the name of the creature, although it is never stated