Estimation of the shoreline in the 13th and 17th century at Kiritappu marsh, eastern Hokkaido, Japan


Kei Ioki1, Yuki Sawai1, Yuichi Namegaya1, Koichiro Tanigawa1, Dan Matsumoto1, Atsunori Nakamura1 and Yumi Shimada2, (1)Geological Survey of Japan, AIST, Tsukuba, Japan, (2)University of Tsukuba, Tsukuba, Japan