| 词条 | Saint Christophe Formation |
| 释义 |
| name = Couches de Saint Christophe | period = Late Cretaceous|Paleogene | age = | image = | imagesize = | caption = | type = Geological formation | prilithology = Schist | otherlithology = Calcitic Sandstone | namedfor = Chapel St. Christophe, Verbier | namedby = | region = Savoie | country = France | coordinates = {{Coord|45.696144|N|6.734438|E|display=inline,title}} | unitof = Valais trilogy | subunits = | underlies = | overlies = Couches des Marmontains | thickness = Average of 500 m | extent = | area = | map = | map_caption = }} The Couches de Saint Christophe are a sedimentary formation deposited between the Late Cretaceous and the Paleogene. It is a very monotonous sequence of calcitic sandstones and black schists. These are interpreted as a turbidite sequence. The average thickness of the unit is 500 m.[1] The Couches de Saint Christophe are a post-rift sequence that overlies the Couches des Marmontains.[2] The Couches de Saint Christophe occupy the following nappes:[2]
Large outcrops of the Couches de Saint Christophe crop out north of Bourg-Saint-Maurice.[2] The type locality of the formation is the Val de Bagnes in the canton Valais of Switzerland. It was first described by Rudolf Trümpy in 1952. The formation is named after a chapel ({{Coord|46.094905|N|7.200371|E|display=inline}}) to the northwest of Verbier.[3] The Saint Christophe formation can be correlated with the Sassauna Formation found in Graubünden and calcareous flysch found in the Engadine.[4] References1. ^{{cite web|last=Loprieno|first=Andrea|title=http://earth.unibas.ch/tecto/research/Diss_Loprieno_2001_small.pdf|url=http://earth.unibas.ch/tecto/research/Diss_Loprieno_2001_small.pdf|accessdate=21 February 2013}} 2. ^1 2 {{cite journal|last=Loprieno|first=Andrea|title=The Valais units in Savoy (France): a key area for understanding the palaeogeography and the tectonic evolution of the Western Alps|year=2011}} 3. ^{{cite web|title=Lithostratigraphisches Lexikon der Schweiz|url=http://www.stratigraphie.ch/?page=details&strat=Penninikum_W&id=5018|accessdate=25 February 2013}} 4. ^{{cite book|last=Tricart|first=Pierre-Charles de Graciansky, David G. Roberts, Pierre|title=The Western Alps, from rift to passive margin to orogenic belt : an integrated geoscience overview|year=2010|publisher=Elsevier|location=Amsterdam|isbn=978-0444537249|edition=1st|page=153}} 3 : Geology of France|Geology of the Alps|Geology of Switzerland |
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