Oshimizu, Oyama Town tracksite (Cretaceous of Japan)

Also known as Ohyama, Ooyama-machi, Toyama

Where: Toyama, Japan (36.5° N, 137.3° E: paleocoordinates 48.4° N, 137.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Atotsugawa Formation (Tetori Group), Aptian (125.0 - 113.0 Ma)

• also listed as Inotani Mbr of the Nagatogawa Fm (Itoshiro Gp); Atotsugawa is in the Akaiwa Subgroup; fission-track age for formation of 113 +/- 6 Ma

• bed-level stratigraphic resolution

Environment/lithology: fluvial-deltaic; brown, gray, muddy sandstone

• "proximal mouth bar palaeoenvironment"
• "very fine sandstone bed"

Size classes: macrofossils, mesofossils

Preservation: mold/impression, trace

Collected by T. Hamuro in 1995-2002

Collection methods: quarrying, surface (in situ), mechanical,

Primary reference: M. Matsukawa, T. Hamuro, T. Mizukami and S. Fujii. 1997. First trackway evidence of gregarious dinosaurs from the Lower Cretaceous Tetori Group of eastern Toyama prefecture, central Japan. Cretaceous Research 18:603-619 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 60557: authorized by Matthew Carrano, entered by Kaitlin Maguire on 17.05.2006, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
  -
Toyamasauripus masuiae n. gen. n. sp.
Toyamasauripus masuiae n. gen. n. sp. Matsukawa et al. 1997 dinosaur
tracks
 Saurischia -
Sauropoda indet. sauropod
tracks
 Theropoda -
Theropoda indet. theropod
tracks and teeth
Aves
  -
Aves indet. Linnaeus 1758 bird
tracks
Reptilia
 Ornithischia -
Ankylosauria indet. ornithischian
tracks