Ishigedo - Towada

Immediately after leaving the rest area. You have to pay attention to the signs and walk. If you are impressed by the autumn leaves and walk, you may overlook it. "Ishigedo" is a dialect of this region and seems to mean "a hut made of stone". The large monolith supported by the katsura tree looks like a hut as its name suggests. That thing.

Every time I walked in the Oirase Gorge, the explosion of the Higashi-Hakkoda caldera volcano was tremendous, and the pyroclastic flow up to Sanbongihara in Towada City caused volcanic ash to accumulate over a wider area. The water level of the original caldera lake of Towada caldera volcano, which exploded slightly to the south after the explosion, was much higher than it is now. The water pressure was so high that pillow lava was formed by the eruption of the lake bottom around the current closed house. And when it broke around Konoguchi, the torrent that flowed out suddenly scraped the ground of welded tuff formed by the pyroclastic flow, and the fact that the Oirase Gorge was created. Exhibits can be found all over the valley, including Iwaya in Ishigado. The plate-shaped monoliths of welded tuff that form the Iwaya are due to plate-like joints. In the Oirase Gorge, where square joints are overwhelmingly large, there are not many places where plate joints can be confirmed at this time. Most of what is made at the top of the pyroclastic flow is crushed and washed away, and you may not see anything else big. Currently, the rocks along the mountain stream are overwhelmingly the ones that have been washed away and the corners have been shaved, and it is such rocks that support the roof rocks of Iwaya in Ishigado. Imagine that there was a stream that swept away such a huge and hard rock, and I was reminded of the power of nature. It is clear that the story of the thief "Kijin Omatsu", which is also introduced on the route bus, is a complete myth, so I would like you to stop. This road was built in the Meiji period, and in the Edo period, the only road from Sannohe and Sannohe to Lake Towada was a mountain road that crossed Tsukihiyama. The road could not cross the canyon of Kanzawa from the vicinity of Sobe Makino, went down along Kanzawa, became the same route as the current road near Choshi Otaki, and went out to Konoguchi, and there was no road near Ishigedo. Because.