室戸ユネスコ世界ジオパーク/ Muroto UNESCO World Geopark/ 室户的UNESCO世界地质公园






■Muroto UNESCO World Geopark

 This geo park is in eastern Kochi prefecture, around Muroto city, and faces the Pacific Ocean. It is recognized as a UNESCO World Geopark since you can find history of diastrophism. Geopark is a word combined “geo” and “park” and it means a place where you can learn about the Earth and enjoy altogether. There are 127 locations in 37 different countries around the globe that are recognized as geoparks and eight of them are in Japan. Muroto was put on the list in September 18, 2011 (according to Japan Geopark Network homepage).

 Muroto experienced a two-meter elevation gain in last 1,000 years and the history of the land or many geological events can be seen. These features make Muroto a very unique place on Earth. For instance, “Mikurodo” and “Shinmeikutsu” are caves formed by sea waves around 1,200 years ago and Koubou Daishi stayed to attain spiritual enlightenment. In his time, the caves were much lower than they are now and you only could see sky and ocean from inside. You can see underwater stratum formed around 30-40 million years ago in Gyoudo-Kuromi beach, another site of dynamic events of the Earth. You can find turbidite structure, piled up layers of sand and mud, in vertical direction, slumping structure, a disordered structure of stratum caused by landslide at seafloor, ripple marks caused by water flow, trace fossil which shows biological activities, a dike of sand stone formed by liquefaction after an earthquake thanks to huge elevation of land there. Marine terrace and shallow of west side water make a great place for fishing and agriculture and have formed local lifestyle and culture. In contrast, the east side is a steep fault scarp and it forms unique industries like collecting deep sea water.

 Muroto Geopark is where you can meet unique geology and climate, and life and industry which take advantage of them. The park’s guides explain well about these things. This place changes one’s way of thinking of scenery and landscape and makes one think that you want to go again.


位于高知县东部、向太平洋伸出的室户市,作为见证大地变动历史的场所,全境被UNESCO(联合国教科文组织)认定为世界Geopark。Geopark是将“Geo”(地球、大地)与“Park”(公园)的复合词,含义即地质公园,是可以学习地球知识、也可以四处娱乐的场所。现在被认定为世界Geopark的共有127处,分布在35个国家,日本占了8处。室户Geopark于2011年9月18日被认定。(据日本Geopark network官方主页)。


还有一个记录下地球种种变化的重要现场——黑耳海岸(行当岬新村海岸),可以看见约3000万年~4000万年前海底堆积的地层。这里有泥砂层层重叠的Turbidaite(浊流岩)从水平状态向上升起,有因海底滑坡打乱平行沉积地层其中一层构造的Slump(滑塌构造),有残留水流形成的漣痕(ripple mark)及生物痕迹的痕迹化石,有据说是地震时液体转化为的化石砂岩岩脉,等等。因为隆起,可以在地面上近距离观看。