@article{oai:niigata-u.repo.nii.ac.jp:00003218, author = {山本, 裕雄 and 栗田, 裕司 and 松原, 尚志}, issue = {5}, journal = {地質学雑誌, 地質学雑誌}, month = {May}, note = {Geologic age of the "Miocene" Iwaya Formation in Awajishima Island is examined by means of calcareous nannofossils and dinoflagellate cysts. Calcareous nannofossil flora indicates biozone NP17 to NP20 or CP14b to CP15b and a late Middle Eocene to Late Eocene age. The dinoflagellate cyst assemblages also show approximately the same age. These results reveal that the Iwaya Formation is the constituent of the Eocene-Oligocene Kobe Group. Molluscan assemblages resembling those from the Iwaya Formation have been known from the "Setouchi Miocene Series" in the coastal area of the eastern Seto Inland Sea. Molluscan fauna and stratigraphic correlation of the "Miocene" in this area should also be re-examined on the basis of precise geochronologic data.}, pages = {379--382}, title = {兵庫県淡路島北部の第三系岩屋層から産出した始新世石灰質ナンノ・渦鞭毛藻化石とその意義}, volume = {106}, year = {2000} }