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Tsubanazaki is located south of the Oma-town, where is famous for ”Tuna Fishing". There are columnar joint rocks of dacite from Tertiary age. It is interesting that local people call those columnar joint rocks  "lumber rock" and used them for fence or stone walls in their life. I found the rocks have been used for stairs to the sea at the site (see the last photo below) . 




Okoppe, Oma-machi, Shimokita-gun, Aomori-ken


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