Keliki Sanmyaku

Keliki Sanmyaku runs diagonally across Yayoi and features five volcanoes. Snow topped Mt. Zal in the northeast, a post shield volcano, is 4247 masl and over 32000 cubic kilometers. It is so massive that the ocean crust is depressed beneath it by six kilometers. Measured from its base on the ocean floor it rises over ten thousand meters and is the highest point in the Hyakunoshima Archipelago. Mt. Zal is approximately one million years old and last erupted about six thousand years ago, it is considered a dormant volcano. Greenpoint is about sixty four kilometers west, as the crow flies. South of Mt Zal is Qhurupuna, (2105 masl) a dormant shield volcano that has not erupted for more than 100,000 years, whose slopes are covered in yellow, gold, and orange flowers, moths, and butterflies. Its known locally as Goldie. Southwest of Qhurupuna is Mt. Okmok, a 9.3 kilometer wide circular caldera truncates the top of the large shield volcano, (1073 masl) currently Tulip Lake fills 150 of the 475 meter deep crater. Mt Okmok is still active, but has not erupted in hundreds of years. Southeast of Mt. Okmok is the active shield volcano Kurosuna Yama which is composed mostly of basalt , with an elevation of 1676 masl and a prominence of 790 m, the large irregularly shaped summit caldera measures 4 by 3.2 km with walls up to 120 meters high. Its eruptive history is long and extensive, the oldest exposed lava dates to more than 30000 years old. Most eruptions flow from fissures down its southeastern flank into the Hilina Rift Valley and then on into Byron Bay, known for its steep cliffs and exotic black sand beaches that can only be accessed by sea. The town of Okaji is eighty seven kilometers southwest of Kurosuna Yama, as the crow flies. Domuyo Kazan on the southwest coast of Yayoi is more than 365,000 years old and has been continuously erupting since April 3033, starting with an event that generated a three hundred meter high lava fountain, that still pulses like a heartbeat, though recently its not as high, and has added 93 ha of new land to the island in the succeeding years. The shield volcano is 1732 masl and its caldera is 15 km wide, its slopes are covered in fumaroles, hot springs, and geysers. The town of Destin is one hundred and six kilometers north, as the crow flies.