Aniakchak dinosaur tracksite (Cretaceous to of the United States)

Also known as ANIA

Where: Lake and Peninsula County, Alaska (56.8° N, 157.8° W: paleocoordinates 70.4° N, 128.1° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Chignik Formation, Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• found throughout section along coastal outcrops

• group of beds-level stratigraphic resolution

Environment/lithology: paralic; fine-grained, gray siltstone and fine-grained, gray sandstone

• "tidal flat or near shore deposits"
• "The tracks are in a light- to medium-gray, fine-grained sandstone...There is a medium gray siltstone layer approximately 1 cm thick between the exposed track and the rest of the boulder. The tracks preserved in the sandstone are interpreted as undertracks, with the actual track preserved in the siltstone interbed.

Size class: macrofossils

Preservation: cast, mold/impression, trace

Collected in 2002, 2016–2018; reposited in the DMNH

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

Primary reference: A. R. Fiorillo. 2002. The first record of a Cretaceous dinosaur from western Alaska: implications for understanding the paleoarctic. Journal of Vertebrate Paleontology 22(3 (suppl.)):53A [M. Carrano/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 44848: authorized by Matthew Carrano, entered by Matthew Carrano on 17.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Ornithischia - Iguanodontipodidae
Hadrosauropodus sp.
Hadrosauropodus sp. Lockley et al. 2003 ornithopod
footprints; 16FP-04,15; DMNH 2016-05-03, 05-05
 Ornithischia - Tetrapodosauridae
Tetrapodosaurus sp.
Tetrapodosaurus sp. Sternberg 1932 ornithopod
16FP-10; DMNH 2016-05-07
Aves
  - Avipedidae
Aquatilavipes sp.
Aquatilavipes sp. Currie 1981 bird
DMNH 2018-12-01
Reptilia
 Theropoda - Ornithomimipodidae
Magnoavipes sp.
Magnoavipes sp. Lee 1997 coelurosaur
field #17AF7-15-2
 Theropoda - Grallatoridae
Grallator sp.
Grallator sp. Hitchcock 1858 theropod
field #17AF7-14-1