4-413: Mount Nasu ( 那須岳 , Nasu-dake ) is a group of complex volcanoes located in the northeast part of Nikkō National Park , Japan. The tallest peak is Sanbonyari Peak at a height of 1,916.9 m (6,289 ft). Mount Nasu is one of the 100 Famous Japanese Mountains . Mount Nasu has the following major peaks: These peaks are known collectively as Nasu Five Peaks ( 那須5岳 , Nasu-Go-Take ) . It
8-471: Is estimated that Mount Nasu started erupting 600 thousand years ago. The eruption started from the north end of the mountain range, at Kashi-Asahi Peak. Only Chausu Peak is active today. Complex volcano A complex volcano , also called a compound volcano or a volcanic complex , is a mixed landform consisting of related volcanic centers and their associated lava flows and pyroclastic rock . They may form due to changes in eruptive habit or in
12-523: The Precambrian rocks of northern New Mexico , which indicates that caldera complexes have been important for much of Earth's history. Yellowstone National Park is on three partly covered caldera complexes. The Long Valley Caldera in eastern California is also a complex volcano; the San Juan Mountains in southwestern Colorado are formed on a group of Neogene -age caldera complexes, and most of
16-414: The location of the principal vent area on a particular volcano. Stratovolcanoes can also form a large caldera that gets filled in by a lava dome, or else multiple small cinder cones , lava domes and craters may develop on the caldera's rim. Although a comparatively unusual type of volcano, they are widespread in the world and in geologic history. Metamorphosed ash flow tuffs are widespread in
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