Where: Yamaguchi, Japan (34.3° N, 131.0° E: paleocoordinates 45.7° N, 139.2° E)
• coordinate estimated from map
• small collection-level geographic resolution
When: Nb Member (Nishinakayama Formation), Late/Upper Pliensbachian to Late/Upper Pliensbachian (189.6 - 182.0 Ma)
• Locality belongs to the Protogrammoceras nipponicum zone. The Nishinakayama Fm attains about 300m in maximum thickness, and is lithostratigraphically subdivided into three members, namely Na, Nb (black shales with intercalations of fine sandstone; 160m thick), and Nc in upward sequence.
• bed-level stratigraphic resolution
Environment/lithology: marine; silty, sandy shale
Size class: macrofossils
Primary reference: K. Tanabe. 1991. Early Jurrasic Macrofauna of the Oxygen-Depleted Epicontinental Marin Basin in the Toyora Area, West Japan. Saito Ho-on Kai Special Publication 3:147-161 [M. Aberhan/S. Nurnberg/P. Wagner]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 38182: authorized by Martin Aberhan, entered by Sabine Nürnberg on 18.04.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
| unclassified | |
| Bivalvia | |
|
Pseudomytiloides matsumotoi Hayami 1960 clam | |
| Cephalopoda | |
|
| |
Fuciniceras nakayamense, Protogrammoceras yabei, Protogrammoceras nipponicum, Protogrammoceras sp., Harpoceras inouyei, Harpoceras okadai
Fuciniceras nakayamense ammonite
Protogrammoceras yabei ammonite
Protogrammoceras nipponicum ammonite
Protogrammoceras sp. Spath 1913 ammonite
Harpoceras inouyei ammonite
Harpoceras okadai ammonite | |
|
Dactylioceras helianthoides ammonite | |
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| |