Pont d'Argent Quarry, bed 4 (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.

• bed-level stratigraphic resolution

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

• 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

  - Rhynchosauroidae
Rhynchosauroides virgiliae3 Demathieu et al. 1978 reptile
Rhynchosauroides petri Demathieu 1966 reptile
Phalangichnus sp.4 Schmidt 1959 reptile
misspelled "Phalangicnus"
 Saurischia - Eubrontidae
Anchisauripus bibractensis n. sp.2 Demathieu 1971 theropod
21.8 F
 Saurischia - Anchisauripodidae
aff. Coelurosaurichnus sp.1 Huene 1941 theropod
21.8 E (or Dinosauripus)
Coelurosaurichnus perriauxi3 Demathieu and Gand 1972 theropod
 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
"Chirotherium barthi" = Chirotherium barthii Kaup 1835 archosaur
Brachychirotherium pachydactylum3 Demathieu and Gand 1973 archosaur
Brachychirotherium circaparvum3 Demathieu 1971 archosaur
21.8 AS
 Pseudosuchia - Rotodactylidae
Rotodactylus rati n. sp.2 Demathieu 1971 archosaur
21.8 I2