Naruko (volcano)
stratovolcano in Japan
Naruko (鳴子火山群, Naruko kazangun) is a stratovolcano located in Ōsaki, Miyagi Prefecture, Japan. The volcano consists of a 7 km wide caldera with several lava domes. The summit of the 470 m high Mt. Kurumigatake is one of the four lava domes located in the center of the caldera. The volcano is well known because of its relationship to the Naruko Hot Springs Villages. However, its lack of well-defined features makes it difficult to recognize for a casual observer. The Japan Metrological Agency considers Naruko to be an active volcano.
The Naruko volcano was formed through two pyroclastic flows, which occurred 73,000 and 45,000 years ago. The first lava domes were formed approximately 20,000 years ago. The rocks produced by the pyroclastic flows and lava domes vary in composition, but are generally dacitic.
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