Umashima (Uma Island): Late Oligocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes - Cetacea - Aetiocetidae
Tsai et al. 2024 1 specimen
Osteichthyes - Perissodactyla - Amynodontidae
see common names

Geography
Country:Japan
Coordinates: 34.0° North, 130.9° East (view map)
Paleocoordinates:35.1° North, 127.9° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period: Paleogene Epoch: Oligocene
Stage: Chattian 10 m.y. bin: Cenozoic 4
Key time interval: Late Oligocene
Age range of interval: 27.3 - 23.04 m.y. ago
Stratigraphy
Geological group:Ashiya Formation:Jinnobaru
Stratigraphic resolution:bed
Lithology and environment
Primary lithology:fine,gray sandstone
Lithology description: grayish and fine-grained sandstone
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Also known as:Kokuraki-ta-ku, Kitakyushu City, Fukuoka
Database number:183070
Authorizer:P. Mannion, M. Uhen Enterer:P. Mannion, M. Uhen
Modifier:M. Uhen Research group:vertebrate
Created:2016-11-30 10:27:52 Last modified:2025-02-22 15:12:02
Access level:the public Released:2016-11-30 10:27:52
Creative Commons license:CC0
Reference information

Primary reference:
61077. K. Miyata, Y. Tomida, K. C. Beard, G. F. Gunnell, H. Ugai and K. Hirose. 2011. Eocene mammals from the Akasaki and Nakakoshiki formations, western Kyushu, Japan: Preliminary work and correlation with Asian Land Mammal Ages. Vertebrata PalAsiatica 49(1):53-68 [P. Mannion/P. Mannion]

Secondary references:

21569 C.-H. Tsai, T. Kimura, and Y. Hasegawa. 2024. Coexistence of Oligocene toothed and baleen-assisted mysticetes in the northwestern Pacific. Fossil Record 27(1):95-100 [G. Webster/G. Webster/M. Uhen]