Gateway to the Paleobiology Database
Shirakaba-no-sawa River (Cretaceous of Japan)

Where: Japan (42.8° N, 142.1° E: paleocoordinates 46.9° N, 131.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hakobuchi Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, muddy sandstone

Size class: macrofossils

Collected by Y. Kawashita

• Repository: National Museum of Nature and Science, Tsukuba

Primary reference: Y. Shigeta and T. Nishimura. 2013. A new species of Gaudryceras (Ammonoidea, Gaudryceratidae) from the lowest Maastrichtian of Hokkaido, Japan and its biostratigraphic implications. Paleontological Research 17:47-57 [M. Clapham/M. Clapham] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 174603: authorized by Matthew Clapham, entered by Matthew Clapham on 16.11.2015

Creative Commons license: CC BY (attribution)