| 引用文献 |
| 1 | 山本和広ほか（１９９１）奥尻島の第三紀火山岩のK-Ar年代と東北日本弧周辺の漸新世および前期中新世火山岩の岩石学的特徴．岩鉱，８６，５０７ー５２１ | Yamamoto, K., et al (1991) K-Ar ages of the Terriary volcanic rocks from Okushi Island and the petrological characters of the Oligocene to early Miocene volcanic rocks from the Northeast Japan arc and surrounding areas. J.Japan. Assoc.Min.Petrol.Econ.Geol., 86, 507-521. In Japanese with English abstract | 1129 |
| 2 | 雁澤好博（１９９２）西南北海道渡島半島の新第三紀層序と古地理．地質学論集，37，11-23 | Ganzawa, Y. (1992) Neogene stratigraphy and paleogeography of the Oshima Peninsula, Southwest Hokkaido, Japan. Mem. Geol. Soc. Japan, 37, 11-23 | |
| 3 | 玉生志郎（１９７８）ガラスによるフィション・トラック年代測定．地質学会85年大会講演要旨，288 | Tamanyu, S. (1978) Fission track age dating of glass. Abstract Geol. Soc. Japan, 288 | 987 |