Where: Japan (44.3° N, 141.8° E: paleocoordinates 49.0° N, 130.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Upper Haborogawa Formation (Yezo Group), Campanian (83.6 - 72.1 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# 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 62239: authorized by Austin Hendy, entered by Austin Hendy on 15.07.2006

Creative Commons license: CC BY (attribution)