Untere Wilflingen-Bank
Retour à Achdorf-FormationReprésentation et statut
- Couleur RGB
- R: 185 G: 160 B: 155
- Rang
- Banc lithostratigraphique
- Usage
- Ce terme n'est pas en usage.
- Status
- terme local (informel)
Nomenclature
- Deutsch
- Untere Wilflingen-Bank
- Français
- Banc inférieur de Wilflingen
- English
- Lower Wilflingen Bed
- Origine du nom
-
Wilflingen (Deutschland)
- Variantes historiques
-
Untere Wilflingen-Bank = Lower Wilflingen Bed (Dietze 2022)
Description
- Description
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Dietze et al. 2022 S.72: The Untere Wilflingen-Bank (formerly: Comptum-Bank, see Dietze et al. 2021a) consists of a chamosite-oolitic, gray-green to dark brown marly limestone, partly rich in fossils.
- Épaisseur
- Ca. 1,6 m (Dietze et al. 2022)
Hiérarchie et succession
- Unité hiérarchiquement supérieure
- Unités sous-jacentes
Âge
- Âge au sommet
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- Aalénien
- Âge à la base
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- Aalénien
Géographie
- Extension géographique
- Süddeutschland.
Paléogéographie et tectonique
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- Dogger du Jura
- Termes génériques
- Type de protolithe
-
- sédimentaire
- Métamorphisme
- non métamorphique
Références
- Définition
-
(2021) :
The Middle Jurassic Opalinuston Formation (Aalenian, Opalinum Zone) at its type locality near Bad Boll and adjacent outcrops (Swabian Alb, SW Germany). Palaeodiversity 14: 15–113
S.28: 3.2. Achdorf Formation
By definition, the Achdorf Formation coincides with the base of the “Comptumbank” (Franz & Nitsch 2009), which is here re-named as Wilflingen-Bank. This bed is recorded from the Western Swabian Alb (Rieber 1963) to a few kilometres east of the village of Gammelshausen (Franz & Nitsch 2009, fig. 7). Since the lower Donzdorf-Sandstein, which forms the base of the Eisensandstein Formation, occurs a few metres above the Wilflingen-Bank, the Achdorf and Eisensandstein formations are intergrading at their boundary in the study area (Franz & Nitsch 2009, fig. 7).
The reason for re-naming the “Comptumbank” as Wilflingen-Bank is based on a new interpretation of the previous index species Nautilus comptus Reinecke, 1818. The syntypes of this species have been identified by E. M mönnig (Coburg), and as a consequence, it became clear that they represent Pleydellia from the Aalensis Zone of the Upper Toarcian. The discovery of the original material makes the neotype designation of a specimen illustrated in Dorn (1935: pl. 26, fig. 3) by Zeiss (1972) invalid (ICZN 1999, Art. 75.8). Chandler & Callomon (2009) designated the specimen illustrated by Reinecke (1818: pl. 1, figs. 5, 6) as the lectotype of Pleydellia compta.
Here we introduce the name Wilflingen-Bank as a replacement name for the former “Comptumbank”. Its type locality is a permanent exposure along the road connecting Wilflingen and Gosheim (Wilflinger Steige) in the district of Wellendingen-Wilflingen (Dietl & R rieber 1980). The “classical” outcrops (Katzensteige) at the steep northern and eastern slopes of the ʻHirnwiesenʼ near Gosheim and some further outcrops at the southern slope of the ʻHirnwiesenʼ (Fischer 1924; Lörcher 1934, 1939; Rieber 1963) are located in the same district, but are very difficult to access.