Pont d'Argent Quarry, bed 4 tracksite (Triassic to of France)

Also known as Autunois

Where: Bourgogne-Franche-Comté, France (46.9° N, 4.4° E: paleocoordinates 11.7° N, 16.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Grès d'Antully Formation, Anisian to Anisian (247.2 - 237.0 Ma)

• layers grouped informally as the "Grès inférieurs" (lower sandstones). Fossils occur in beds 4 and 6; the "lower sandstones" comprise beds 1-7 within the quarry sequence. These beds are in turn correlated with the middle and upper Muschelkalk.

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal; green, argillaceous sandstone and green, sandy claystone

• a local marine environment, shallow, of lagoonal character.
• Level 4 is clayey-sandy, fine, green, and locally bariolitic, generally very silicified. Contains plurimetric lenses laterally. Level 6 (higher) is sandy-clayey, fine arkose, obliquely bedded, and has salt pseudomorphs. Locally sandy as well.

Size class: macrofossils

Preservation: mold/impression, trace

Collected by G. Demathieu, L. Courel, J. de la Comble in 1962–1963

Collection methods: quarrying, surface (in situ),

• Tracks of Rotodactylus, Anchisauripus, Coelurosaurichnus, and Sphingopus are very common, but no tallies are given. Many hundreds of tracks are present at the quarry.

Primary reference: L. Courel, G. Demathieu, and R. Buffard. 1968. Empreintes de pas de Vertébrés et stratigraphie du Trias [Vertebrate footprints and Triassic stratigraphy]. Bulletin de la Société Géologique de France, 7e série 10:275-281 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 28462: authorized by Matthew Carrano, entered by Matthew Carrano on 14.02.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
  - Rhynchosauroidae
Rhynchosauroides virgiliae3 Demathieu et al. 1978 reptile
Rhynchosauroides petri Demathieu 1966 reptile
Phalangichnus sp.4 Schmidt 1959 reptile
misspelled "Phalangicnus"
 Thecodontia -
Rotodactylus rati n. sp.2, "Chirotherium barthi" = Chirotherium barthii
Rotodactylus rati n. sp.2 Demathieu 1971 archosaur
21.8 I2
"Chirotherium barthi" = Chirotherium barthii Kaup 1835 archosaur
 Saurischia -
aff. Coelurosaurichnus sp.1 Huene 1941 saurischian
21.8 E (or Dinosauripus)
Coelurosaurichnus perriauxi3 Demathieu and Gand 1972 saurischian
 Saurischia - Eubrontidae
Anchisauripus bibractensis n. sp.2 Demathieu 1971 theropod
21.8 F
 Saurischia - Parachirotheriidae
Sphingopus ferox Demathieu 1966 theropod
 Pseudosuchia - Chirotheriidae
Synaptichnium cameronensis3 Peabody 1948 archosaur
"Synaptichnium cf. diabloense" = Synaptichnium diabloensis4 Peabody 1948 archosaur
21.8 BB
Synaptichnium argantobrivense n. sp.3 Demathieu and Gand 1981 archosaur
Isochirotherium sp.3 Haubold 1971 archosaur
Isochirotherium delicatum3 Courel and Demathieu 1976 archosaur
Brachychirotherium pachydactylum3 Demathieu and Gand 1973 archosaur
Brachychirotherium circaparvum3 Demathieu 1971 archosaur
21.8 AS