Banc du Col de la Plaine Morte
Zurück zu HelvetikumDarstellung und Status
- Farbe CMYK
- (0%,37%,37%,4%)
- Farbe RGB
- R: 245 G: 155 B: 155
- Rang
- lithostratigraphische Bank
- Gebrauch
- Element ist in Gebrauch
- Status
- lokaler Begriff (informell)
- SKS-Notiz
-
Nicht zu verwenden: unnötig da sehr lokal ; Ortsname schon für eine andere lithostratigraphische Einheit verwendet (Wildflysch de la Plaine Morte).
- SKS-Datum
- 18.10.2007
- Diskussion des Status
Nomenklatur
- Deutsch
- Col-de-la-Plaine-Morte-Bank
- Français
- Banc du Col de la Plaine Morte
- Italiano
- Strato del Col de la Plaine Morte
- English
- Col de la Plaine Morte Bed
- Herkunft des Namens
- Historische Varianten
-
Plaine Morte Bed (Föllmi et al. 2006 et 2007, Föllmi & Gainon 2008, Föllmi 2009)
Beschreibung
- Mächtigkeit
- max. 20 cm
Komponenten
- Ammoniten
Deshayesites, Aconeceras
Hierarchie und Abfolge
- Übergeordnete Einheit
Alter
- Alter Top
-
- Frühes Aptien
- Bermerkungen zu Top
-
Untere Abschnitt der furcata-Zone
- Alter Basis
-
- Frühes Aptien
- Bermerkungen zu Basis
-
Obere Abschnitt der deshayesi-Zone
Geografie
- Geographische Verbreitung
- Nur lokal im Rawilgebiet.
- Typusregion
- Rawilgebiet (VS/BE)
- Typlokalität
-
-
Col de la Plaine Morte - Rohrbachstein (VS/BE)
Merkmale des Ortes- Obergrenze
- Untergrenze
- typische Fazies
- (2601250 / 1136320)
- <p>Typlokalität der Rohrbachstein-Bank und der Col-de-la-Plaine-Morte-Bank (Föllmi et al. 2007)</p>
-
Col de la Plaine Morte - Rohrbachstein (VS/BE)
- Typusprofil
-
-
Col de la Plaine Morte - Rohrbachstein (VS/BE)
Merkmale des Ortes- Obergrenze
- Untergrenze
- typische Fazies
- (2601250 / 1136320)
- <p>Typlokalität der Rohrbachstein-Bank und der Col-de-la-Plaine-Morte-Bank (Föllmi et al. 2007)</p>
-
Col de la Plaine Morte - Rohrbachstein (VS/BE)
Referenzen
- Erstdefinition
-
2007) :
Unlocking paleo- environmental information from Early Cretaceous shelf sediments in the Helvetic Alps: stratigraphy is the key! Swiss J. Geosci. 100, 349-369
p.12: In the Rawil area, the lower part of the Grünten Member is covered by a thin, nodular glauconite- and phosphate-containing layer, in which sparse phosphate particles occur. The limestone nodules are peripherically phosphatized. For this bed we propose the name Plaine Morte Bed (Fig. 2, Fig. 8; Gainon 2001), with as type locality the same outcrop as described above for the Rohrbachstein Bed. The Plaine Morte Bed signals again an episode of platform drowning.
(
- Neubearbeitung
-
2009) :
Neubenennungen lithostratigraphischer Einheiten in der helvetischen Kreide - Comment on the article by the Schweizerisches Komitee für Stratigraphie (SJG, Vol 102/2): What is in a stratigraphical name? Swiss J. Geosci. 102 (2009) 515–518
(
The Plaine-Morte Bed
In the area of the Col de la Plaine Morte, the Plaine-Morte Bed embodies an approximately 20-cm thick nodular phosphatic layer within the Grünten Member, which is well distinguishable in the field. The Plaine-Morte Bed includes large clasts composed of crinoidal limestone of the lower Grünten Beds, which are peripherically phosphatized and small phosphatic nodules and particles. Sparse ammonites indicate the deshayesi and furcata ammonite zones (Föllmi & Gainon 2008). In this region, the Plaine-Morte Bed merges laterally with the higher Luitere
Bed, and the intervening upper Grünten Beds disappear.
The importance of this bed is that it helps us to explain the older ages shown in distal occurrences of the Luitere Bed in Allgäu and Vorarlberg, where ammonites are present from the deshayesi and furcata ammonite zones (besides younger ammonites indicating the early Late Aptian). These older ages can be explained by the Luitere Bed being merged with the Plaine-Morte Bed, in analogy of what is observed in the area of the Col de la Plaine Morte. This merging pattern is well comparable to the merging of different phosphorite beds into one singe bed
higher up in the Garschella Formation.
To this comes that with the Plaine-Morte Bed, the imprint of oceanic anoxic event 1a (the so-called “Selli event”) has been discovered on the northern Tethyan margin. (...)
- Wichtige Publikationen
-
2008) : Demise of the northern Tethyan Urgonian carbonate platform and subsequent transition towards pelagic conditions: the sedimentary record of the Col de la Plaine Morte area, central Switzerland Sedimentary Geology 205, 142–159(2007) : Unlocking paleo- environmental information from Early Cretaceous shelf sediments in the Helvetic Alps: stratigraphy is the key! Swiss J. Geosci. 100, 349-369(