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Mokawaruppu River, Tokachi Subprefecture, Hokkaidō Prefecture, Japan
| Lat/Long (Decimal) | 43.072,143.7 |
|---|---|
| Co-ordinates Derivation | estimated from map |
| Mindat.org Region (for given coordinates) | Tokachi Subprefecture, Hokkaidō Prefecture, Japan |
Collections
| Collection | Reference | Stratigraphic Name | Comments | Lithology | Age |
|---|---|---|---|---|---|
| Mokawaruppu River | Kurihara K., Kano M., et al (2016) | Kawaruppu | Diplomoceras cylindraceum, reported here, was extracted from a siltstone 15 m below the K/Pg boundary. Magnetostratigraphy at this site indicates that the base of C30r is situated 45 m below the K/Pg boundary (Hamano et al., 1986; Hamano, 1988; Kaiho, 1992). Using the time scale of Ogg (2012) for the geomagnetical polarity and Vandenberghe et al. (2012) for the K/Pg boundary, the age of the base of C30r is 68.369 Ma, and the age of the K/Pg boundary is 66.0 Ma. Supposing that the sediment accumu | siltstone | 70.6 - 66 Ma Late/Upper Cretaceous |
Recorded Fossils
| Accepted Name | Hierarchy | Age |
|---|---|---|
 Diplomoceras cylindraceumspecies | Animalia : Mollusca : Cephalopoda : Ammonoidea : Diplomoceratidae : Diplomoceras : Diplomoceras cylindraceum | 70.6 - 66 Ma Late/Upper Cretaceous |
References
| Kurihara K., Kano M., et al (2016) The last surviving ammonoid at the end of the Cretaceous in the north Pacific region, Paleontological Research 20, 116-120 |
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
