Where: Japan (33.8° N, 134.0° E)
• Paleocoordinates: 40.0° N, 137.2° E (Wright 2013)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Nagase Formation, Early/Lower Turonian (93.9 - 89.8 Ma)
• STRATIGRAPHIC RELATIONS: From the Nagase Fm, which is overlain by the Kajisako Fm. AGE: Early Turonian, on the basis of ammonite, inoceramid, and radiolarian biostratigraphy. STRATIGRAPHIC POSITION: From the lower lithostratigraphic unit in regional section; upper part of Nagase Fm.
• bed-level stratigraphic resolution
Environment/lithology: coastal; lithified, fine-grained sandstone
Size class: macrofossils
Preservation: mold/impression
Collection methods: COLLECTOR: Multiple collectors. REPOSITORY: Dept. of Geology, Kyushu University, Japan.
Primary reference: M. Tashiro and T. Kozai. 1982. Part V. Bivalve fossils from the Upper Cretaceous of the Monobe area, Shikoku. Palaeontological Society of Japan Special Papers 25:69-92 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 87008: authorized by Austin Hendy, entered by Austin Hendy on 27.02.2009
Creative Commons license: CC0 (CC0)
Taxonomic list
Bivalvia | |
Acila (Truncacila) hokkaidoensis Nagao 1932 divaricate nutclam |