Izumi bird tracksite: Barremian, Japan
collected by M. Chiba, K. Hachiya, & M. Umemoto 1987

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758
Bivalvia - Venerida - Neomiodontidae
Bivalvia - Venerida - Corbiculidae
Osteichthyes - Avipedidae
37 specimens
Azuma et al. 2002
see common names

Geography
Country:Japan State/province:Fukui County:Ono
Coordinates: 43.8° North, 144.5° East (view map)
Paleocoordinates:41.0° North, 177.6° West (Wright 2013)
Basis of coordinate:based on political unit
Altitude:52 meters
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Early Cretaceous
Stage: Barremian 10 m.y. bin: Cretaceous 2
*Period:Early/Lower Cretaceous *Epoch:Middle Neocomian - Early/Lower Gallic
*International age/stage:Early/Lower Valanginian - Late/Upper Barremian
Key time interval: Barremian
Age range of interval: 125.77 - 121.4 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Tetori Formation:Itsuki
Stratigraphic resolution:bed
Stratigraphy comments: upper part of Itoshiro Subgroup, = Izuki Fm.
Lithology and environment
Primary lithology:black sandy "shale"
Secondary lithology:coarse sandstone
Includes fossils?Y
Lithology description: conglomeratic sandstone, coarse- to fine-grained sandstone, and shale. "black sandy shale"
Environment:lacustrine indet.
Geology comments: described as marginal lacustrine
Taphonomy
Modes of preservation:cast,trace
Size of fossils:macrofossils
Spatial orientation:life position
Preservation of anatomical detail:medium
Associated major elements:some
Disassociated major elements:some
Temporal resolution:snapshot
Collection methods and comments
Collection excludes:species names
Collection methods:surface (float),field collection
Reason for describing collection:taxonomic analysis
Collectors:M. Chiba, K. Hachiya, & M. Umemoto Collection dates:7 Jun 1987
Collection method comments: discovered by Masami Chiba, Kiichiro Hachiya, and Masayuki Umemoto
Metadata
Also known as:Ono
Database number:24807
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2002-08-20 13:30:06 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-08-20 13:30:06
Creative Commons license:CC0
Reference information

Primary reference:
6957.5% 16700Y. Azuma, T. Sugimori, K. Yamada, T. Kojima, and K.-i. Takeyama. 1992. Two dinosaur footprints from the Tetori Group of Izumi Village, Fukui Prefecture, central Japan. Bulletin of the Japan Sea Research Institute, Kanazawa University, Kanazawa 24:19-33 [M. Carrano/M. Carrano/M. Carrano]

Secondary references:

29439ETE Y. Azuma, Y. Arakawa, Y. Tomida and P. J. Currie. 2002. Early Cretaceous bird tracks from the Tetori Group, Fukui Prefecture, Japan. Memoir of the Fukui Prefectural Dinosaur Museum 1:1-6 [M. Carrano/M. Carrano]
29362ETE M. Fujita. 2008. Dinosaur tracks from the Tetori Group. International Dinosaur Symposium in Fukui 2008: Recent Progress of the Study on Asian Dinosaurs and Paleoenvironments. Fukui Prefectural Dinosaur Museum, Fukui 33-36 [M. Carrano/M. Carrano]
10132 M. J. Fujita. 2003. Geological age and correlation of the vertebrate-bearing horizons in the Tetori Group. Memoir of the Fukui Prefectural Dinosaur Museum 2:3-14 [M. Carrano/M. Carrano/M. Carrano]
55479 Fukui Kenritsu Kyoryu Hakubutsukan. 2010. [Exhibit Guidebook of the Fukui Prefectural Dinosaur Museum]. 1-212 [M. Carrano/M. Carrano]
16852ETE M. Matsukawa, M. G. Lockley, and J. Li. 2006. Cretaceous terrestrial biotas of East Asia, with special reference to dinosaur-dominated ichnofaunas: towards a synthesis. Cretaceous Research 27(1):3-21 [M. Carrano/M. Carrano]