Northeastern Hikoshima Nishiyama-cho coast - Shimonoseki City (Ashiya Gp): Late/Upper Oligocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea
Echinoidea indet. (Leske 1778)
1 individual
Bivalvia - Ostreida - Ostreidae
"Ostrea" sp. Linnaeus 1758
0.5 individuals
Bivalvia - Carditida - Carditidae
? Venericardia sp. Lamarck 1801
0.5 individuals
Venericardia subnipponica Nagao 1928
13.5 individuals
recombined as Venericardia (Venericor) subnipponica
Bivalvia - Lucinida - Lucinidae
? Lucinoma sp. Dall 1901
7.5 individuals
Lucinoma nagaoi Oyama and Mizuno 1958
2 individuals
Bivalvia - Cardiida - Veneridae
Callista cf. hanzawai
1 individual
Pitar matsumotoi (Nagao 1928)
2.5 individuals
original and current combination Pitaria matsumotoi
Bivalvia - Solenida - Solenidae
Solen connectens
2.5 individuals
Bivalvia - Nuculanida - Sareptidae
? Portlandia sp. Mörch 1857
0.5 individuals
Bivalvia - Nuculanida - Nuculanidae
Saccella nagaoi
1.5 individuals
Gastropoda - Turritellidae
Turritella karatsuensis Nagao 1928
2 individuals
Gastropoda - Naticidae
Euspira ashiyaensis Nagao 1928
2 individuals
synonym of Euspira meisensis
Gastropoda - Neogastropoda - Buccinidae
Trominina japonica (Takeda 1953)
1 individual
Thecostraca - Balanomorpha - Balanidae
"Balanus" sp. Da Costa 1778
3 individuals
see common names

Geography
Country:Japan State/province:Yamaguchi
Coordinates: 34.0° North, 130.9° East (view map)
Paleocoordinates:39.2° North, 127.4° East
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/Upper Oligocene
Age range of interval:27.82000 - 23.03000 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:fine,gray sandstone
Includes fossils?Y
Lithology description: SPECIFIC: blocky light gray fine sandstone. GENERAL: 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:51449
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2005-06-05 12:30:48 Last modified:2013-11-25 13:37:23
Access level:authorizer only Released:2006-06-05 12:30:48
Creative Commons license:CC BY
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]