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Seen from the SW, Iwate stratovolcano on Japan's northern island of Honshu, has an elongated profile. The extensively dissected Onogajo volcano forms the older, western part of Iwate and is truncated by the 1.8 x 3 km Nishi-Iwate caldera. The smoother slopes at the right are formed by ejecta from the younger Yakushi-dake cone, which was constructed on the eastern rim of the caldera.

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