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is one of the 100 Famous Japanese Mountains. The high mountain lies on the border of Taketa and Bungo-ōno in Ōita Prefecture and Takachiho, Nishiusuki District in Miyazaki Prefecture. It is the highest peak in Miyazaki Prefecture. In Ōita Prefecture only the middle peak of Mount Kujū is higher. The Sobo Mountain range extends into three prefectures: Ōita, Miyazaki and Kumamoto. Because of the volcanic activity which formed the mountain, huge rocks can be found everywhere around the mountain. There is a great variety of mountain climbing routes, ranging from animal trails to well maintained paths. Courses ae available from relaxed hiking for enjoyment to cliff climbing routes aimed at advanced climbers. Steep rock climbing routes can be seen from all trails in the neighbourhood of the summit. The surroundings of Mount Sobo abound in mineral resources which were mined from the Edo period to the mid-Shōwa period. == Formation == It is believed that the foundation of the Sobo mountain range occurred in two periods of volcanic activity. In the first period, around 13 million years ago, two cauldrons, the ''Sobo caldera'' and the , were formed in an eruption accompanied by pyroclastic flow. The two cauldrons formed at this time, were buried in the second period of volcanic activity leaving the caldera which can be seen today. About 12.5 million years ago, a cauldron opened up once more. During this time ore was formed. Around 10 million years ago the volcanic activity ceased. Erosion levelled off the mountain until 3 million years ago when the large scale activity of the rising Mount Aso system caused a pyroclastic flow which gave Mount Sobo its present shape. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Mount Sobo」の詳細全文を読む スポンサード リンク
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