Mount Oakan


Mount Oakan is a shield volcano located in Akan National Park in Hokkaidō, Japan.

Geography and geology

Mount Oakan sits in the Akan caldera northeast of Lake Akan. The volcano rises some above the surrounding terrain. The top of the volcano is above sea level. The volcanic cone is some in diameter. There are three explosion craters at the summit. At Kitanakahara at about, there is a fumarole. The volcano is made mostly from non-alkalai mafic volcanic rock. The main rock type is andesite and dacite.

History

Mount Oakan emerged in the Late Pleistocene dropping pumice on Minamishikata. After that, continuous lava flows formed the bulk of the volcano. In the final stages of its life, a parasitic volcano formed a lava dome at the summit.
According to its name and local legend, Mount Oakan is the male counterpart to Mount Meakan on the other side of Lake Akan.