The Klettgau Formation is a geological formation in Switzerland. It is Late Triassic in age, covering most of the mid to late Norian, the Carnian, and into the Rhaetian, spanning a period of 26-30 million years.[1]
| Klettgau Formation | |
|---|---|
| Stratigraphic range: Carnian-Rhaetian ~ | |
| Type | Geological formation |
| Unit of | Keuper |
| Sub-units | Ergolz, Gansingen, Berlingen, Seebi, Gruhalde & Belchen Members |
| Underlies | Staffelegg Formation |
| Overlies | Bänkerjoch Formation |
| Thickness | 30–60 m (98–197 ft) locally up to 75 m (246 ft) |
| Lithology | |
| Primary | Mudstone, marl |
| Other | Dolomite, sandstone |
| Location | |
| Coordinates | 47°42′N 8°30′E / 47.7°N 8.5°E |
| Approximate paleocoordinates | 35°12′N 10°42′E / 35.2°N 10.7°E |
| Region | Aargau, Schaffhausen |
| Country | Switzerland |
| Type section | |
| Named for | Klettgau |
| Named by | Jordan et al. |
| Location | Seebi quarry |
| Year defined | 2016 |
  Klettgau Formation (Switzerland) | |
Description
editThe primary depositional environment was that of a playa with marine and fluvial intercalations. The lithology is quite variable consisting primarily of fine grained rocks typically claystones and dolocretes, often with sandstone or carbonatic fluvial channel fills.[2]
Fossil content
editDinosaur fossils are known from the formation, including those of Plateosaurus, Notatesseraeraptor frickensis and Schleitheimia[3][4]
The following other fossils were found in the formation:[1]
- Prozostrodontia
- Hallautherium schalchi[5]
- Helvetiodon schutzi[5]
- ?Thomasia sp.[6]
- cf. Thomasia sp.[6]
- Thomasia antiqua[6]
- T. moorei[6]
- Tricuspes cf. tuebingensis[6]
- ?Haramiyidae indet.[6]
- Morganucodon peyeri
- Morganucodon sp.
- Reptiles
- Deltadectes elvetica[7]
- Termatosaurus albertii[6]
- Proganochelys quenstedtii[8]
- Paleollanosaurus sp.[7]
- ?Variodens sp.[6]
- cf. Diphydontosaurus sp.[7]
- cf. Eudimorphodon sp.[6]
- Archosauriformes indet.[9]
- Nothosauridae indet.[6]
- Pterosauria indet.[6]
- Sphenodontia indet.[7]
- Theropoda indet.[10]
- Amphibians
- Fish
- Invertebrates
References
edit- ^ a b Klettgau Formation at Fossilworks.org
- ^ Jordan et al., 2016
- ^ Zahner & Brinkmann, 2019
- ^ Rauhut et al., 2020
- ^ a b Tatarinov, 1985
- ^ a b c d e f g h i j k l m n o p Clemens, 1980
- ^ a b c d Whiteside et al., 2017
- ^ Scheyer, Torsten M.; Klein, Nicole; Evers, Serjoscha W.; Mautner, Anna-Katharina; Pabst, Ben (December 2022). "First evidence of Proganochelys quenstedtii (Testudinata) from the Plateosaurus bonebeds (Norian, Late Triassic) of Frick, Canton Aargau, Switzerland". Swiss Journal of Palaeontology. 141 (1): 17. Bibcode:2022SwJP..141...17S. doi:10.1186/s13358-022-00260-4. ISSN 1664-2376. PMC 9613585. PMID 36317153.
- ^ Butler et al., 2006
- ^ Carrano, 2020
- ^ a b c Schalch & Peyer, 1919
- ^ Peyer, 1956
Bibliography
edit- Carrano, M. T (2020), Taxonomic opinions on the Dinosauria, unpublished
- Rauhut, Oliver W. M.; Holwerda, Femke M.; Furrer, Heinz (2020), "A derived sauropodiform dinosaur and other sauropodomorph material from the Late Triassic of Canton Schaffhausen, Switzerland", Swiss Journal of Geosciences, 113 (1): 8, doi:10.1186/s00015-020-00360-8, ISSN 1661-8726
- Zahner, M.; Brinkmann, W. (2019), "A Triassic averostran-line theropod from Switzerland and the early evolution of dinosaurs", Nature Ecology & Evolution, 3 (8): 1146–1152, Bibcode:2019NatEE...3.1146Z, doi:10.1038/s41559-019-0941-z, ISSN 2397-334X, PMC 6669044, PMID 31285577
- Whiteside, D. I.; Duffin, C. J.; Furrer, H. (2017), "The Late Triassic lepidosaur fauna from Hallau, North-Eastern Switzerland, and a new 'basal' rhynchocephalian Deltadectes elvetica gen. et sp. nov.", Neues Jahrbuch für Geologie und Paläontologie, 285: 53–74, doi:10.1127/njgpa/2017/0669
- Jordan, Peter; Pietsch, Johannes S.; Bläsi, Hansruedi; Furrer, Heinz; Kündig, Nicole; Looser, Nathan; Wetzel, Andreas; Deplazes, Gaudenz (2016), "The middle to late Triassic Bänkerjoch and Klettgau formations of northern Switzerland", Swiss Journal of Geosciences, 109 (2): 257–284, doi:10.1007/s00015-016-0218-3, ISSN 1661-8726
- Butler, R. J.; Porro, L. B.; Heckert, A. B. (2006), "A supposed heterodontosaurid tooth from the Rhaetian of Switzerland and a reassessment of the European Late Triassic record of Ornithischia (Dinosauria)", Neues Jahrbuch für Geologie und Paläontologie - Monatshefte, 2006 (10): 613–633, doi:10.1127/njgpm/2006/2006/613
- Tatarinov, L. P (1985), "New data on a collection of tetrapod teeth from the Rhaetian of Hallau (Switzerland)", Paleontological Journal, 1: 138–140
- Clemens, W. A (1980), "Rhaeto-Liassic mammals from Switzerland and West Germany", Zitteliana, 5: 51–92
- Peyer, B (1956), "Über Zähne von Haramiyiden, von Triconodonten und von wahrscheinlich synapsiden Reptilien aus dem Rhät von Hallau, Kt. Schaffhausen, Schweiz - On the teeth of haramiyids, triconodonts, and probable synapsid reptiles from the Rhaetic of Hallau, Kanton Schaffhausen, Switzerland", Schweizerische Paläontologische Abhandlungen, 72: 1–72
- Schalch, F.; Peyer, B. (1919), "Über ein neues Rhätvorkommen im Keuper des Donau-Rheinzuges - On a new occurrence of the Rhaetian in the Keuper of the Danube-Rhine valleys", Mitteilungen der Badischen Geologischen Landesanstalt, 8: 263–315