Chuta tracksite (Cretaceous of Mexico)

Also known as Lázaro Cárdenas, Playa Azul, Leonardi locality 88, Boca Seca

Where: Michoacán, Mexico (18.0° N, 102.6° W: paleocoordinates 17.1° N, 66.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Chuta Formation, Albian (113.0 - 100.5 Ma)

• recent detrital zircon date from just below dinosaur track beds

• group of beds-level stratigraphic resolution

Environment/lithology: mire or swamp; hematitic, volcaniclastic, red, argillaceous, calcareous tuff

• "back swamp"
• "volcaniclasitc red beds"; "lithic arenites, shales of volcanic origin, which are reddish in color, laminar and constituted of angular quartz grains, grains of flint, clay and hematite and cemented by calcite." Footprint beds contain raindrops impressions.

Size class: macrofossils

Preservation: cast, trace

Collected by Ferrusiquía-Villafranca

Collection methods: surface (in situ),

Primary reference: I. Ferrusquía-Villafranca, S. P. Applegate, and L. Espinosa-Arrubarrena. 1978. Rocas volcanosedimentarias Mesozoicas y huellas de dinosaurios en la region suroccidental pacifica de México [Mesozoic volcanosedimentary rocks and dinosaur tracks in the southwest Pacific region of Mexico]. Revista – Instituto de Geología, Universidad Nacional Autónoma de México 2(2):150-162 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 59366: authorized by Matthew Carrano, entered by Matthew Carrano on 29.03.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• footprints form the "Chuta Dinosaur Ichnofauna"
Show authors, comments, and common names
Reptilia
 Ornithischia -
Ornithopoda "indet. G"
Ornithopoda "indet. G" ornithopod
IGCU-2533; morphotype G
 Ornithischia - Hypsilophodontidae
Hypsilophodontidae indet.
Hypsilophodontidae indet. hypsilophodontid
IGCU-2542; morphotype D
 Ornithischia - Iguanodontidae
Iguanodontidae indet.
Iguanodontidae indet. Bonaparte 1850 iguanodontid
IGCU-2531, 2536; morphotype E
 Theropoda -
Coelurosauria indet., Coelurosauria indet.
Coelurosauria indet. Huene 1914 coelurosaur
IGCU-2538, 2539, 2541; morphotype A, large coelurosaur or medium-sized carnosaur
Coelurosauria indet. Huene 1914 coelurosaur
IGCU-2532, 2537, 2540; morphotype C; closer to coelurosaurs in size
 Avetheropoda -
? Carnosauria "indet. B", ? Carnosauria "indet. F"
? Carnosauria "indet. B" carnosaur
ICGU 2530, 2535; morphotype B
? Carnosauria "indet. F" carnosaur
IGCU-2534; morphotype F