@article{oai:niigata-u.repo.nii.ac.jp:00026527,
 author = {黒川, 勝己 and 阿部, 夢仁 and 太田, さつき and 吉田, 裕介 and 樋口, 裕也},
 issue = {2},
 journal = {新潟大学教育学部研究紀要 自然科学編, 新潟大学教育学部研究紀要 自然科学編},
 month = {Feb},
 note = {The geology of the Mineoka Hill at the eastern foothii of Mt. Kakuda in Niigata Prefecture is composed of the lower mud-dominated Pliocene Formations and the upper sand-dominated middle Pleistocene Nika Formation. The Pliocene Formations were divided into three Formations by partial unconformities, namely the lower Takenomachi Formation, the upper Takenomachi Formation and the Bashogaoka Formation in ascending order. The 17 tephra key beds were described in detail, and on the basis of the wide-area correlations, the age of these Formations were estimated. The lower Takenomachi Formation is assumed 4.5-3.5Ma, and the upper Takenomachi Formation is 3.5-2.8Ma in age. The Bashogaoka Formation shows shallower environments upwards, and 2.8-2.5Ma in age, though the age of its uppermost horizon was not clarified. The Nika Formation includes mega-ripple bed, and is supposed around near coast to deltaic sedimentation. By the wide-area tephra correlations, the lower Takenomachi Formation is correlated to the middle Shiiya to Hamatsuda Formations in the Nishiyama Oil Belt, and the upper Takenomachi Formation to the Inagawa to middle Nishiyama Formations respectively. Besides, wide-area correlations in the Niigata region to the Niitsu and Higashikubiki were also considered.},
 pages = {107--136},
 title = {角田山東麓峰岡丘陵の地質 : とくに鮮新統のテフラ層序と西山・新津丘陵との比較検討},
 volume = {1},
 year = {2009}
}