Where: Japan (44.1° N, 141.8° E: paleocoordinates 48.7° N, 130.3° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Upper Haborogawa Formation (Yezo Group), Campanian (83.5 - 70.6 Ma)
• STRATIGRAPHIC RELATIONS: Unit Ui-j, Upper Haborogawa Fm overlying Middle Haborogawa Fm of the Yezo Gp and underlying the Campanian-Maastrichtian Pankezawa Fm. THICKNESS: 120-150 m. AGE: Campanian-Maastrichtian, but at base of this succession and hence assigned a Campanian age,., Inoceramus japonicus zone. STRATIGRAPHIC POSITION: Upper portion of section, in middle of 120-150 m thick mudstone of the Upper Haborogawa Fm. Immediately above PBDB# 62235 and imediately below PBDB# 62237 and 62238.
• bed-level stratigraphic resolution
Environment/lithology: offshore; lithified, bioturbated mudstone
Size class: macrofossils
Collection methods: COLLECTOR: Assumed to be collected by authors (Moriya and Hirano) and supplemented by collections of an earlier author Toshimitsu (see Toshimitsu 1988). REPOSITORY: Unknown repository, posibly Waseda University, Japan.
Primary reference: K. Moriya and H. Hirano. 2001. Cretaceous stratigraphy in the Chikubetsu area, Hokaido. Journal of the Geological Society of Japan 107(3):199-214 [A. Miller/A. Hendy/A. Hendy] more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 62236: authorized by Austin Hendy, entered by Austin Hendy on 15.07.2006
Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)