| c; Kitanagano Facies |
| Specimen b is from the Kitanagano Facies |
| ver. 1 20080410, ver. 1.6 20230910 |
| Ichishi group distributes widly from Aki county to Matsuzaka city in Mie prefectue. The horizons are 25 Km from south to north in length and 15 km from east to west in width. One of the famous fossil producing site among the group locates along the Nagano River nearby the Kaisekiyama with the meaning of shell-stones mountain in japanese. The place yields a lot of fossils such as shells, whale bones and shark teeth. |
Formation
| The lower part of the Mitsugano Shale-Sandstone Member, Oi Formation: 18.0 - 17.5 Ma The Kitanagano Sandstone Member, Oi Formation: 18.0 - 17.5 Ma (17.5 Ma: Hoshi, Iwano et al., 2019) (18.0 Ma: Age estimated from sedimentation rate) Kinoshita, H. and Yamaji, A. (2021) Arc-parallel extension in preparation of the rotation of southwest Japan: Tectonostratigraphy and structures of the Lower Miocene Ichishi Group. Island Arc 30 (1), e12427 |
Kitanagano Facies
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