Morawan (Middle Hard Shale Member): Chattian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Sawamura et al. 1996
Godfrey et al. 2016
Osteichthyes - Cetacea - Kentriodontidae
Sawamura et al. 1996
Osteichthyes - Cetacea
Sawamura et al. 1996
Sawamura et al. 1996
Osteichthyes - Cetacea - Aetiocetidae
1 specimen
see common names

Geography
Country:Japan State/province:Hokkaido
Coordinates: 43.3° North, 143.8° East (view map)
Paleocoordinates:44.9° North, 140.2° East (Wright 2013)
Basis of coordinate:estimated from map
Time
Period: Paleogene Epoch: Oligocene
Stage: Chattian 10 m.y. bin: Cenozoic 4
Key time interval: Chattian
Age range of interval: 27.3 - 23.04 m.y. ago
Stratigraphy
Geological group:Kawakami Formation:Morawan Member:Middle Hard Shale
Lithology and environment
Primary lithology: lithified "shale"
Includes fossils?Y
Environment:basinal (siliceous)
Geology comments: basinal (siliceous), near shore
Taphonomy
Modes of preservation:body,original phosphate
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (float),field collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:45787
Authorizer:M. Uhen Enterer:M. Uhen
Modifier:B. Shipps Research group:vertebrate
Created:2004-12-01 11:58:11 Last modified:2025-02-22 15:12:02
Access level:the public Released:2004-12-01 11:58:11
Creative Commons license:CC0
Reference information

Primary reference:
12130. L. G. Barnes, M. Kimura, H. Furusawa and H. Sawamura. 1995. Classification and distribution of Oligocene Aetiocetidae (Mammalia; Cetacea; Mysticeti) from western North America and Japan. The Island Arc 3(4):392-431 [M. Uhen/M. Uhen/M. Uhen]

Secondary references:

43401 S. Godfrey, M. D. Uhen, J. E. Osborne and L. E. Edwards. 2016. A new specimen of Agorophius pygmaeus (Agorophiidae, Odontoceti, Cetacea) from the early Oligocene Ashley Formation of South Carolina, USA. Journal of Paleontology 90(1):154-169 [M. Uhen/M. Uhen/M. Uhen]
33201 H. Kurita. 2004. Paleogene Dinoflagellate Cyst Biostratigraphy of Northern Japan. Micropaleontology 50:1-50 [M. Uhen/S. Strother/M. Uhen]
12154 H. Sawamura, M. Kimura, L. G. Barnes and H. Furusawa. 1996. Late Oligocene Cetacea from Ashoro-cho, Hokkaido, Japan; The fauna and its ecologic implications. The Paleontological Society Special Publication 8:342 [M. Uhen/M. Uhen/P. Wagner]