Where: Japan (43.0° N, 142.0° E: paleocoordinates 52.4° N, 136.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Yezo Group, Early/Lower Cenomanian (99.6 - 93.5 Ma)

• STRATIGRAPHIC RELATIONS: From unnamed lithostratigraphic unit within the middle Yezo Gp, which unconformably overliesthe late Mesozoic Sorachi Gp, and is overlain by Cenozoic strata. AGE: Early Cenomanian, on the basis of ammonite and inoceramid biostratigraphy. STRATIGRAPHIC POSITION: From fallen calcareous concretions near base of regional section.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, concretionary, tuffaceous, calcareous mudstone and lithified sandstone

Size class: macrofossils

Preservation: concretion

Collection methods: COLLECTOR: H. Hirano, T. Matsumoto, and K. Tanabe, 1970's. REPOSITORY: Dept. of Geology, Kyushu University.

Primary reference: H. Hirano, T. Matsumoto, and K. Tanabe. 1977. Mid-Cretaceous stratigraphy of the Oyubari area, central Hokkaido. Palaeontological Society of Japan Special Papers 21:1-10 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 86984: authorized by Austin Hendy, entered by Austin Hendy on 26.02.2009

Creative Commons license: CC BY (attribution)