The vertebrate-bearing Late Triassic Fleming Fjord Formation of central East Greenland revisited: Stratigraphy, palaeoclimate and new palaeontological data

Lars B. Clemmensen, Jesper Milàn, Jan Schulz Adolfssen, Eliza Jarl Estrup, Nicolai Frobøse, Nicole Klein, OctáVio Mateus, Oliver Wings

Research output: Chapter in Book/Report/Conference proceedingChapter

14 Citations (Scopus)

Abstract

In Late Triassic (Norian-Rhaetian) times, the Jameson Land Basin lay at 408 N on the northern part of the supercontinent Pangaea. This position placed the basin in a transition zone between the relatively dry interior of the supercontinent and its more humid periphery. Sedimentation in the Jameson Land Basin took place in a lake-mudflat system and was controlled by orbitally forced variations in precipitation. Vertebrate fossils have consistently been found in these lake deposits (Fleming Fjord Formation), and include fishes, dinosaurs, amphibians, turtles, aetosaurs and pterosaurs. Furthermore, the fauna includes mammaliaform teeth and skeletal material. New vertebrate fossils were found during a joint vertebrate palaeontological and sedimentological expedition to Jameson Land in 2012. These new finds include phytosaurs, a second stem testudinatan specimen and new material of sauropodomorph dinosaurs, including osteologically immature individuals. Phytosaurs are a group of predators common in the Late Triassic, but previously unreported from Greenland. The finding includes well-preserved partial skeletons that show the occurrence of four individuals of three size classes. The new finds support a late Norian-early Rhaetian age for the Fleming Fjord Formation, and add new information on the palaeogeographical and palaeolatitudinal distribution of Late Triassic faunal provinces.

Original languageEnglish
Title of host publicationGeological Society Special Publication
PublisherGeological Society of London
Pages31-47
Number of pages17
Volume434
Edition1
DOIs
Publication statusPublished - 2016

Publication series

NameGeological Society Special Publication
Number1
Volume434
ISSN (Print)03058719

Keywords

  • Amphibia
  • Dinosauria
  • Pisces
  • Sauropodomorpha
  • Testudines
  • Vertebrata

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    Clemmensen, L. B., Milàn, J., Adolfssen, J. S., Estrup, E. J., Frobøse, N., Klein, N., Mateus, O., & Wings, O. (2016). The vertebrate-bearing Late Triassic Fleming Fjord Formation of central East Greenland revisited: Stratigraphy, palaeoclimate and new palaeontological data. In Geological Society Special Publication (1 ed., Vol. 434, pp. 31-47). (Geological Society Special Publication; Vol. 434, No. 1). Geological Society of London. https://doi.org/10.1144/SP434.3