Oberer Teil der Schrattenkalk-Formation
Représentation et statut
- Index
- c5o
- Couleur CMYK
- (31%,0%,13%,24%)
- Couleur RGB
- R: 135 G: 195 B: 170
- Rang
- Membre lithostratigraphique (Sous-formation)
- Usage
- Ce terme est en usage.
- Status
- terme incorrect (mais utilisé de manière informelle)
Nomenclature
- Deutsch
- Oberer Teil der Schrattenkalk-Formation
- Français
- Partie supérieure de la Formation du Schrattenkalk
- Italiano
- Parte superiore della Formazione dello Schrattenkalk
- English
- Upper part of the Schrattenkalk Formation
- Variantes historiques
-
Oberurgon bzw. Oberer Caprotinenkalk (Baltzer 1906), Oberer Schrattenkalk (Paulcke 1906, Staeger 1944, Schindler 1959), Unteres Aptien = oberer Schrattenkalk (Furrer 1938), Upper Schrattenkalk = upper Schrattenkalk (Föllmi et al. 2007), Upper Schrattenkalk Member (Bonvallet 2015)
Description
- Description
-
Hellgrau anwitternder, massiger, bioklastreicher Kalk (Rudisten, Korallen, Gastropoden Muscheln und Mikrofauna).
- Géomorphologie
- Helle Felswand.
- Épaisseur
- Max. 100 m (Föllmi et al. 2007)
Composants
- rudistes
- coraux
- foraminifères
Requienia, Orbitolina lenticularis
Hiérarchie et succession
- Unité hiérarchiquement supérieure
Âge
- Âge au sommet
-
- Aptien précoce
- Note sur le sommet
-
nahe der Grenze zwischen weissi- und deshayesi-Zone (Linder et al. 2006); Mitte des frühen Aptians
- Âge à la base
-
- Aptien précoce
- Note sur la base
-
Mitte des frühen Aptians
Paléogéographie et tectonique
-
- Crétacé moyen
- Crétacé de l'Helvétique
- Paléogéographie
-
plateforme nord téthysienne
:
marge continentale européenne - Termes génériques
- Type de protolithe
-
- sédimentaire
- Métamorphisme
- non métamorphique
Références
- Révision
-
(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.11: The facies of the upper Schrattenkalk is similar to that of the lower Schrattenkalk, with as main difference the frequent occurrence of small patch reefs in its upper part in the outer zone of the platform (Fig. 2; Heim 1910–1916; Oberholzer 1933; Fichter 1934; Lienert 1965; Gebhardt 1983; Bollinger 1988; Schenk 1992). These reefs are composed of corals, rudists, stromatoporoids and chaetetids and separate an inner, lagoonal environment from an outer platform margin environment (e.g. Bollinger 1988; Linder et al. 2006). This maximally 100 m thick unit shows an overall shallowing upward trend and is interpreted as the highstand systems tract of a stratigraphic sequence which started with the Rawil Member (e.g., Funk et al. 1993).
Ammonites from the overlying Grünten Member constrain the minimal age of the upper Schrattenkalk to an age near the boundary between the weissi and the deshayesi zones (Linder et al. 2006) and the deposition of this entire member is essentially limited to the weissi zone.