Mandano: Middle Pleistocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes - Sirenia - Dugongidae
Osteichthyes - Carnivora - Otariidae
Mandano Fossil Research Group 1987 1 specimen
Osteichthyes - Carnivora - Odobenidae
Tomida 1989 1 specimen
see common names

Geography
Country:Japan State/province:Chiba
Coordinates: 35.3° North, 140.1° East (view map)
Paleocoordinates:
Basis of coordinate:estimated from map
Time
Period: Quaternary Epoch: Pleistocene
Stage: Chibanian 10 m.y. bin: Cenozoic 6
Key time interval: Middle Pleistocene
Age range of interval: 0.774 - 0.129 m.y. ago
Stratigraphy
Geological group:Kazusa Formation:Mandano
Stratigraphic resolution:formation
Stratigraphy comments: early middle Pleistocene, approximately 0.5 Ma
Lithology and environment
Primary lithology: sandstone
Includes fossils?Y
Lithology description: sand and gravel
Environment:marginal marine indet.
Taphonomy
Modes of preservation:original phosphate
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Ichihara
Database number:65240
Authorizer:M. Uhen Enterer:M. Uhen
Modifier:M. Uhen Research group:vertebrate
Created:2006-09-20 11:12:08 Last modified:2025-02-22 15:12:02
Access level:the public Released:2006-09-20 11:12:08
Creative Commons license:CC0
Reference information

Primary reference:
18822. H. Furusawa and N. Kohno. 1994. Steller's sea-cow (Sirenia: Hydrodamalis gigas) from the Middle Pleistocene Mandano Formation of the Boso Peninsula, Central Japan. Fossils 56:26-32 [M. Uhen/M. Uhen]

Secondary references:

70357 H. Furusawa. 2005. Evolution of the North Pacific Sirenia (Hydrodamalinae) and their paleoenvironment. Fossils 77:29-33 [M. Uhen/M. Uhen]
64080 Y. Kawamura. 1991. Quaternary mammalian faunas in the Japanese Islands. The Quaternary Research 30(2):213-220 [M. Uhen/M. Uhen/M. Uhen]
34713 Mandano Fossil Research Group. 1987. On a fossil of Otariidae (Mammalia) from the middle Pleistocene Mandano Formation of Ichihara City, Chibu Prefecture, Japan. Chikyu Kagaku 41(6):327-330 [M. Uhen/M. Uhen]
25206 Y. Tomida. 1989. A new walrus (Carnivora, Odobenidae) from the middle Pleistocene of the Boso Peninsula, Japan, and its implication on odobenid paleobiology. Bulletin of the National Science Museum, Series C (Geology & Paleontology) 15(3):109-119 [M. Uhen/M. Uhen]