@article{oai:nipr.repo.nii.ac.jp:00000916,
 author = {Watanabe, Okitsugu and Kato, Kikuo and Satow, Kazuhide and Okuhira, Fumio},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Dec},
 note = {P(論文), Stratigraphy of the 150-m core from Mizuho Station, Antarctica, is studied with visual observation as well as with analysis of density and oxygen isotope profiles. Stratigraphic structures are well preserved to a depth of 70m. Considerably deviated values of density from the average depth-density curve serve as one of good indicators of the texture of initially deposited snow. From stratigraphic interpretation about 10.6g/(cm)^2 is estimated as the mean annual accumulation. With this value the age of the lowermost part of the 150-m core is estimated to be some 1100 years B. P. excluding the periods of hiatus of annual layers. In the δ^<18>O profile to the depth of 60m, the smallest peak indicating the coldest climate is seen at a depth of 32m which is dated back to some 200 years B.P. Comparison of the δ^<18>O profile in the Mizuho core with that in the Camp Century core indicates that the period of hiatus of annual layers is about one-third of the real duration of the core formation and the mean annual accumulation is about two-thirds of 10.6g/(cm)^2 at Mizuho Station in the past 300 years.},
 pages = {25--47},
 title = {Stratigraphic Analysis of Firn and Ice at Mizuho Station},
 volume = {10},
 year = {1978}
}