Okuyama, KH-2, Kawahigashi: Olenekian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Limida - Limidae
"Lima" sp. Bruguière 1797
Bivalvia - Pectinida - Claraiidae
Claraia sp. Bittner 1901
Bivalvia - Ostreida - Bakevelliidae
Nakazawa 1959
Cephalopoda - Ceratitida - Ophiceratidae
Cephalopoda - Ceratitida - Xenodiscidae
see common names

Geography
Country:Japan
Coordinates: 35.4° North, 135.2° East (view map)
Paleocoordinates:4.3° North, 132.7° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Triassic Epoch: Early Triassic
Stage: Olenekian 10 m.y. bin: Triassic 1
Key time interval: Olenekian
Age range of interval: 250.8 - 247 m.y. ago
Stratigraphy
Formation:Narabara
Stratigraphic resolution:group of beds
Stratigraphy comments: Uppermost horizon of formation
Lithology and environment
Primary lithology: lithified "siliciclastic"
Lithology description: Dark blue, banded or laminated sandy shale and shale, more or less slaty and often calcareous, with fine-grained sandstone (based on description of formation).
Environment:marine indet.
Taphonomy
Modes of preservation:mold/impression
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:115244
Authorizer:M. Clapham Enterer:M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2011-08-31 11:11:12 Last modified:2025-02-22 15:12:02
Access level:the public Released:2011-08-31 11:11:12
Creative Commons license:CC0
Reference information

Primary reference:
33624. K. Nakazawa. 1953. Discovery of Claraia and Eumorphotis from Triassic Yakuno Group, Kyoto Pref, Japan. Memoirs of the College of Science, University of Kyoto, Series B 20:261-269 [M. Clapham/M. Clapham/M. Clapham]

Secondary references:

33625 K. Nakazawa. 1959. Permian and Eo-Triassic Bakevellias from the Maizuru Zone, southwest Japan. Memoirs of the College of Science, University of Kyoto, Series B 26:193-213 [M. Clapham/M. Clapham]