釧路付近にFortipecten takahashiiの新産出

概要

論文の詳細を見る
The search for whale bones at a cliff in Tenneru, near Kushiro, Hokkaido revealed a new occurence of Fortipecten takahashii from the lower part of the "Kushiro Group " developed there. The " Kushiro Group " in Tenneru is divisible into two units by an unconformity in between, and is also unconformably overlain by the Kutcharo pyroclastic flow deposits of about 29,400 y.B.P. The upper part of the "Kushiro Group" in Tenneru contains "Tenneru shell bed" and is considered here to be Tyrrhenian deposits. Fortipecten and some other associated molluscs were found from the lower part of the lower unit of the "Kushiro Group". At least the Fortipecten horizon is correlatable with the other Pliocene strata in Hokkaido. The "Kushiro Group" as a whole has long been considered as representing the marine, older Diluvial deposits in Hokkaido, however, it now badly needs restudy as to its faunal as well as lithological succession and correlation.
地学団体研究会の論文
1981-01-25