Kagahara, loc. Sn0002/loc. 295: Late Barremian - Aptian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Ornithomimidae
1 specimen
vertebra; "ostrich-type dinosaur"
Manabe et al. 1989
"almost identical to Gallimimus bullatus"
Matsukawa and Obata 1994
Gastropoda
Hasegawa et al. 1999
Gastropoda - Cassiopidae
Hasegawa et al. 1999
Gastropoda - Tylostomatidae
Hasegawa et al. 1999
Bivalvia - Cardiida - Neomiodontidae
Hasegawa et al. 1999
Bivalvia - Trigoniida - Trigonioididae
Hasegawa et al. 1999
see common names

Geography
Country:Japan State/province:Honshu County:Gunma
Coordinates: 36.1° North, 138.8° East (view map)
Paleocoordinates:45.0° North, 148.1° East (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period: Cretaceous Epoch: Early Cretaceous
Stage: Barremian - Aptian 10 m.y. bin: Cretaceous 2 - Cretaceous 3
Key time interval: Late Barremian - Aptian
Age range of interval: 125.77 - 113.2 m.y. ago
Stratigraphy
Geological group:Sanchu Formation:Sebayashi Member:lower
Stratigraphic resolution:bed
Stratigraphy comments: upper part of Lower Sebayashi Fm.
Lithology and environment
Primary lithology: sandy "shale"
Secondary lithology:fine,gray sandstone
Includes fossils?Y
Lithology description: "weathered sandy shale, 2.5 m in thickness, interbedded between light grey fine-grained sandstone beds"
Environment:estuary/bay
Geology comments: "brackish-water environment"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Disassociated major elements:many
Disassociated minor elements:many
Fragmentation:occasional
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Sebayashi
Database number:50307
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2005-05-12 10:36:39 Last modified:2025-02-22 15:12:02
Access level:the public Released:2005-05-12 10:36:39
Creative Commons license:CC0
Reference information

Primary reference:
55938. Y. Hasegwa, M. Manabe, and Y. Azuma. 1986. Dinosaur fossils and tracks in Japan. In D. D. Gillette and M. G. Lockley (eds.), First International Symposium on Dinosaur Tracks and Traces, Abstracts with Program 15 [M. Carrano/M. Carrano]

Secondary references:

13512ETE Y. Hasegawa, M. Manabe, T. Kase, S. Nakajima, and Y. Takakuwa. 1999. An ornithomimid vertebra from the Early Cretaceous Sebayashi Formation, Sanchu Terrane, Gunma Prefecture, Japan. Bulletin of the Gunma Museum of Natural History 3:1-6 [M. Carrano/M. Carrano/M. Carrano]
14022ETE M. Manabe, Y. Hasegawa, and Y. Azuma. 1989. Two new dinosaur footprints from the Early Cretaceous Tetori Group of Japan. In D. D. Gillette and M. G. Lockley (eds.), Dinosaur Tracks and Traces. Cambridge University Press, Cambridge 309-312 [M. Carrano/K. Maguire/M. Carrano]
54260 M. Matsukawa and I. Obata. 1994. Dinosaurs and sedimentary environments in the Japanese Cretaceous: a contribution to dinosaur facies in Asia based on molluscan palaeontology and stratigraphy. Cretaceous Research 15(1):101-125 [M. Carrano/M. Carrano]
33853ETE R. E. Molnar, I. Obata, M. Tanimoto and M. Matsukawa. 2009. A tooth of Fukuiraptor aff. F. kitadaniensis from the Lower Cretaceous Sebayashi Formation, Sanchu Cretaceous, Japan. Bulletin of Tokyo Gakugei University, Division of Natural Sciences 61:105-117 [M. Carrano/M. Oreska]