@article{oai:niigata-u.repo.nii.ac.jp:00026775, author = {黒川, 勝己 and 太田, さつき and 吉田, 裕介 and 阿部, 夢仁 and 堀, 喜代子 and 小西, ゆう子}, issue = {2}, journal = {新潟大学教育人間科学部紀要 自然科学編, 新潟大学教育人間科学部紀要 自然科学編}, month = {Feb}, note = {Five tephra key beds were detected from the Takenomachi Formation in the Mineoka Hill, situated at the eastern foothill of Mt.Kakuda, in the Niigata region. They are namely the Sdp, Ojw-1 (Ymp), Ojw-2, Ojw-3 (Ocg) and Ths Tephra Beds in ascending order. They are all correlated to tephras in the upper Hamatsuda Formation in the Nishiyama Oil Field. The surveyed area in this study corresponds to the middle part horizon of the Takenomachi Formation and the possible age of 3.5-3.7Ma was given on the tephrochronological basis.}, pages = {49--61}, title = {新潟県角田山東麓峰岡丘陵の竹野町層における浜忠層層準のテフラ層の認定}, volume = {10}, year = {2008} }