Locality 1 (unnamed assemblage 1) - Shimonoseki City (Ashiya Gp) (Oligocene of Japan)

Also known as X1, Locality 1

Where: Yamaguchi, Japan (34.0° N, 130.9° E: paleocoordinates 39.2° N, 127.4° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Ashiya Group, Late/Upper Oligocene (28.4 - 23.0 Ma)

• No stratigraphic data available as manuscript is in Japanese.

• bed-level stratigraphic resolution

Environment/lithology: coastal; medium-grained, coarse sandstone

• Sedimentary facies and molluscan assemblages suggest an environment in the upper euneritic zone of a temperate to subtropical sea. From unnamed assmeblage 1
• SPECIFIC: medium-coarse 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.

Size class: macrofossils

Collection methods: bulk, quarrying,

• 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.

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 51441: authorized by Austin Hendy, entered by Austin Hendy on 05.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Taxonomic list is exhaustive for mollusca and includes other groups (Penguins, Sharks etc). Nomenclature is of a high quality.
Thecostraca
 Balanomorpha - Balanidae
"Balanus" sp. Da Costa 1778 barnacle
Gastropoda
 Sorbeoconcha - Naticidae
Euspira sp. Agassiz 1837 moon snail
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
 Nuculanida - Nuculanidae
Saccella sp. Woodring 1925 pointed nut clam
 Arcida - Glycymerididae
 Solenida - Solenidae
 Cardiida - Tellinidae
 Cardiida - Mactridae
Pseudocardium sp. Gabb 1866 clam
=Spisula sp. A of Nagao
 Cardiida - Veneridae
"Dosinia (Phacosoma) chikuzenensis" = Dosinia nomurai
"Dosinia (Phacosoma) chikuzenensis" = Dosinia nomurai Otuka 1934 venus clam
 Cardiida - Ungulinidae
Felaniella confusa Nagao 1928 clam
Scaphopoda
 Dentaliida - Dentaliidae
"Dentalium" ashiyaensis Nagao 1928 tusk shell