Hello!! Nice to meet you. I'm Junko Kokubo,Japanese caver. Your friend,Mr.Goto introduce you to me. I'm a student at Tokyo univercity of agriculture . And I belong to Exprolation club. My club act Rufting,climbing and caving. My club went on a Cave Expedition in Mongolia in 1997 and went to China for Rufting in 1999. I went on a Cave Expedition in Alaska with American caver last year. Then,I'm interested in Etorohu iland(an area of central Kril, a state of Saharin ,South East Russia). I'd like to do caving in that lava iland.So,I got one old geological map. But,Basalt and Andesalt are shown on same area of the map. We could not know possibility of caving becouse of it. If you know cave or geological features, Please tell me!! I'm O.K.when you are not busy. I wish to fine new lava cave in Etorohu iland. Thank you very much. Junko Kokubo :e-mail:85970059@nodai.ac.jpHello!! Nice to meet you. I'm Junko Kokubo,Japanese caver. Your friend,Mr.Goto introduce you to me. I'm a student at Tokyo univercity of agriculture . And I belong to Exprolation club. My club act Rufting,climbing and caving. My club went on a Cave Expedition in Mongolia in 1997 and went to China for Rufting in 1999. I went on a Cave Expedition in Alaska with American caver last year. Then,I'm interested in Etorohu iland(an area of central Kril, a state of Saharin ,South East Russia). I'd like to do caving in that lava iland.So,I got one old geological map. But,Basalt and Andesalt are shown on same area of the map. We could not know possibility of caving becouse of it. If you know cave or geological features, Please tell me!! I'm O.K.when you are not busy. I wish to fine new lava cave in Etorohu iland. Thank you very much. Junko Kokubo :e-mail:85970059@nodai.ac.jp