This aerial view toward the south shows the northeastern side of Paoha Island; the Mono Craters and Sierra Nevada are in the far distance. Most of Paoha Island consists of layers of lake sediments that were pushed up above the water level by rising magma (similar to the way in which the resurgent dome in Long Valley Caldera was pushed upward). But the north (bottom of photo) and east (left side of island) tips of the island consist of craters and lava flows that may have erupted as recently as A.D. 1720-1850.