ammonites
KO2 locality, Shokawa Village, Kobudani Valley (Cretaceous of Japan)

Also known as Shokawa Village locality 2 (KO-2)

Where: Gifu, Japan (36.1° N, 136.9° E: paleocoordinates 43.5° N, 139.0° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Okurodani Formation (Tetori Group), Berriasian (145.5 - 140.2 Ma)

• Itoshiro Subgroup, lowest part of formation; Three levels with fossils within layer: lowemost plant macrofossils, then assorted bones and fish; then dinosaur teeth at top - total thickness 200 mm maximum.

•'KO2 bone-bed horizon'

•The fossiliferous horizon has been provisionally dated in relation to volcaninc tuff layers above the bone bed, for which dates of 120-140 Ma were obtained by fission track dating (Gifu-Ken Dinosaur Research Committee 1993).

• bed-level stratigraphic resolution

Environment/lithology: fine channel fill; fine-grained, gray, silty sandstone and mudstone

• possibly "a floodplain environment close to a large river"
• "Alternating beds of fine-grained sandstone, mudstone and coarse-grained sandstone with a tuff bed. The dinosaur teeth were obtained from a muddy fine-grained sandstone bed." "The bone-bed matrix is a dark gray silty-sandstone."

Size classes: macrofossils, mesofossils

Collected by Mr Ikoi Shibata, Mr Ohkura, Mr Shimizu in 1990-1994

Collection methods: surface (float), surface (in situ),

• Repositories: Visitor's Centre of the Board of Education, Shokawa village (SBEG VP); Visitor's Centre of the Izumi Board of Education, Izumi, Fukui Prefecture, Japan (IBEF VP)

Primary reference: Y. Hasegawa, M. Manabe, S. Isaji, M. Ohkura, I. Shibata and I. Yamaguchi. 1995. Terminally resorbed iguanodontid teeth from the Neocomian Tetori Group, Ishikawa and Gifu Prefecture, Japan. Bulletin of the National Science Museum, Tokyo, Series C 21(1, 2):35-49 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50310: authorized by Matt Carrano, entered by Matt Carrano on 12.05.2005, edited by Roger Benson