Where: Yamaguchi, Japan (34.3° N, 131.0° E: paleocoordinates 44.9° N, 138.7° E)
• coordinate estimated from map
• small collection-level geographic resolution
When: Nb Member (Nishinakayama Formation), Tenuicostatum (183.0 - 182.0 Ma)
• Locality belongs to the Fontanelliceras fontanellense zone = lowermost Toarcian according to revisions of Nakada and Matsuoka (2008, 2011).
•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 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 38171: authorized by Martin Aberhan, entered by Sabine Nürnberg on 17.04.2004
Creative Commons license: CC BY (attribution)