210520_miura-peninsula_DSC00105_Lr_arasaki-coast

Volcanic ash layers and a sea cave on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021 by Katsuaki Watanabe

三浦半島荒崎海岸の火山灰層と海食洞（神奈川県横須賀市）