Locality B - Hikoshima Nishiyama-cho (Ashiya Gp): Late Oligocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Arcida - Glycymerididae
f category
Bivalvia - Pectinida - Pectinidae
f category
Bivalvia - Adapedonta - Solenidae
r category
Bivalvia - Cardiida - Tellinidae
r category
Tellina sp. Linnaeus 1758
r category
Bivalvia - Venerida - Veneridae
c category
f category
c category
Bivalvia - Lucinida - Lucinidae
? Lucinoma sp. Dall 1901
r category
Bivalvia - Carditida - Carditidae
r category
Bivalvia - Carditida - Crassatellidae
f category
Bivalvia - Protobranchia - Nuculidae
r category
Bivalvia - Protobranchia - Yoldiidae
f category
Gastropoda - Naticidae
r category
f category
Gastropoda - Cassidae
r category
Gastropoda - Neogastropoda - Nassariidae
r category
r category
Gastropoda - Neogastropoda - Buccinidae
r category
Siphonalia sp. Adams 1863
r category
Gastropoda - Neogastropoda - Volutidae
r category
Gastropoda - Turritellidae
r category
see common names

Geography
Country:Japan State/province:Yamaguchi
Coordinates: 34.0° North, 130.9° East (view map)
Paleocoordinates:35.1° North, 128.0° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
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
Stratigraphic resolution:bed
Stratigraphy comments: No stratigraphic data available as manuscript is in Japanese.
Lithology and environment
Primary lithology: sandstone
Includes fossils?Y
Lithology description: The Ashiya Group is characterised by a sandstone-dominant shallw marine sequence (about 150 m thick), in which sedimentary facies include cross-stratified sandstone, parallel stratified sandstone, bioturbated sandstone, and sandstone/siltstone couplet facies.
Environment:coastal indet.
Geology comments: Sedimentary facies and molluscan assemblages suggest an environment in the upper euneritic zone of a temperate to subtropical sea.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:medium
Collection methods and comments
Collection methods:bulk,selective quarrying,field collection
Reason for describing collection:paleoecologic analysis
Collection method comments: No collection data available as manuscript is in Japanese. Material is reposited in the Dept of Earth and Planetary Sciences, Faculty of Science, Kyushu University, and in Shimonoseki City Archaeological Museum, Shimonoseki.
Taxonomic list comments:Taxonomic list is exhaustive for mollusca and includes other groups (Penguins, Sharks etc). Nomenclature is of a high quality.
Metadata
Database number:51447
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2005-06-05 12:29:43 Last modified:2025-02-22 15:12:02
Access level:authorizer only Released:2006-06-05 12:29:43
Creative Commons license:CC0
Reference information

Primary reference:
13684. K. Okamoto and T. Sakai. 1995. Sedimentary facies and fossil molluscs of the Oligocene Ashiya Group in the Hikoshima Takenokojim and Nishiyama area, Shimonoseki City, Southwest Japan. Bulletin of the Mizunami Fossil Museum 22:19-50 [A. Miller/A. Hendy/A. Hendy]