Tristel Formation

Tristel Formation
Stratigraphic range: Late Barremian-Early Aptian
~127–123 Ma

PreꞒ

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S

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Tristel Formation; Stratigraphic range: Late Barremian-Early Aptian; ~127–123 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Tristel Formation near its type locality, looking at Naafkopf from the southwest
Type	Geological formation
Unit of	, Bündnerschiefer
Thickness	150–250 m (490–820 ft)
Lithology
Primary	Limestone, marl
Other	Shale
Location
Coordinates	47°03′39″N 9°36′25″E / 47.060767°N 9.607067°ECoordinates: 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 .^[2]

Outcrops can be found in the Engadin window, the Tauern window, the , and many localities of the Penninic realm of the eastern and western Alps.^[3]

The type locality is the area around the Naafkopf (

The Tristel Formation can be correlated with the in Graubünden and the Couches de l’Aroley Formation in Savoie (France) and Valais (Switzerland).^[4]^[5]

References[]

^ ^a ^b ^c "Tristel-Formation". Lithostratigraphische Einheiten Deutschlands.
^ 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.
^ "http://palstrat.uni-graz.at/Stratigraphische_Tabelle_von_Oesterreich_2004.pdf" (PDF). Archived from the original (PDF) on 30 September 2007. Retrieved 25 February 2013. External link in |title= (help)
^ Loprieno, Andrea (2011). "The Valais units in Savoy (France): a key area for understanding the palaeogeography and the tectonic evolution of the Western Alps". Cite journal requires |journal= (help)
^ 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.