<国立科博専報>浦河地域産哺乳類化石新資料

概要

論文の詳細を見る
A Tertiary bed was newly found at about 23 km upstream the mouth of the Motourakawa river, although its distribution is narrowly limited (Fig. 1). The bed in question is referred to the lower to middle Miocene or upper Oligocene, for the reason that it contains some index fossils of mollusca. The palynological investigation also supports this age determination. In this bed a costa of Cetacea gen. et sp. indet. (Fig. 2) was found in association with marine invertebrates which suggest a shallow muddy sedimentary environment. The present paper briefly describes the observed characteristics of the bone and discusses its geologic age. Another specimen of mammalian bone (Fig. 3) is preserved at the National Science Museum, Tokyo. Its locality was reported as Urakawa-machi, Hokkaido, but no other information is available. The specimen was identified as an atlas of Bison sp. This was the first discovery of bison in Hokkaido and of its atlas Bone in Japan.
国立科学博物館の論文
1972-11-30