Earth:Tristel Formation
| Tristel Formation Stratigraphic range: Late Barremian-Early Aptian ~127–123 Ma | |
|---|---|
 Tristel Formation near its type locality, looking at Naafkopf from the southwest | |
| Type | Geological formation |
| Unit of | Rhenodanubic Group, Bündnerschiefer |
| Thickness | 150–250 m (490–820 ft)[1] |
| Lithology | |
| Primary | Limestone, marl |
| Other | Shale |
| Location | |
| Coordinates | [ ⚑ ] : 47°03′39″N 9°36′25″E / 47.060767°N 9.607067°E |
| Region | Allgäu, Oberbayern, Tirol, Vorarlberg |
| Country |  Austria Germany Liechtenstein Switzerland |
| Type section | |
| Named for | Tristel, a mountain next to the Naafkopf |
| Named by | Schwizer |
| Year defined | 1984 |
The Tristel Formation is a stratigraphic formation of the northern-central Alps, deposited between the late Barremian and the early Aptian of the Early Cretaceous. It consists of thickly banked limestones, marls and shales.[1] It is the lowest formation of the Bündnerschiefer and belongs to the Rhenodanubic Group.[2]
Outcrops can be found in the Engadin window, the Tauern window, the Rechnitz window, and many localities of the Penninic realm of the eastern and western Alps.[3]
The type locality is the area around the Naafkopf ( [ ⚑ ] 47°03′39″N 9°36′25″E / 47.060767°N 9.607067°E) in the border region of Austria, Liechtenstein and Switzerland .[1]
The Tristel Formation can be correlated with the Klus Formation in Graubünden and the Couches de l’Aroley Formation in Savoie (France ) and Valais (Switzerland ).[4][5]
References
- ↑ 1.0 1.1 1.2 "Tristel-Formation". Lithostratigraphische Einheiten Deutschlands. http://www.bgr.de/app/litholex/gesamt_ausgabe_neu.php?id=2008131.
- ↑ Tricart, Pierre-Charles de Graciansky, David G. Roberts, Pierre (2010). The Western Alps, from rift to passive margin to orogenic belt : an integrated geoscience overview (1st ed.). Amsterdam: Elsevier. p. 158. ISBN 978-0444537249.
- ↑ "Stratigraphische Tabelle von Österreich". 2004. http://palstrat.uni-graz.at/Stratigraphische_Tabelle_von_Oesterreich_2004.pdf. Retrieved 2023-05-28.
- ↑ Loprieno, Andrea (2011). "The Valais units in Savoy (France): a key area for understanding the palaeogeography and the tectonic evolution of the Western Alps". International Journal of Earth Sciences 100 (5): 963. doi:10.1007/s00531-010-0595-1. Bibcode: 2011IJEaS.100..963L.
- ↑ Tricart, Pierre-Charles de Graciansky, David G. Roberts, Pierre (2010). The Western Alps, from rift to passive margin to orogenic belt : an integrated geoscience overview (1st ed.). Amsterdam: Elsevier. p. 153. ISBN 978-0444537249.
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