Couches à Costatoria goldfussi
Zurück zu Membre du Balmi (-grabe/-wald)Darstellung und Status
- Farbe CMYK
- (0%,29%,55%,4%)
- Farbe RGB
- R: 245 G: 175 B: 110
- Rang
- lithostratigraphische Bank
- Gebrauch
- Element ist in Gebrauch
- Status
- informeller Begriff
Nomenklatur
- Deutsch
- Costatoria-goldfussi-Schichten
- Français
- Couches à Costatoria goldfussi
- Italiano
- Strati a Costatoria goldfussi
- English
- Costatoria goldfussi Beds
- Herkunft des Namens
-
Nom basé sur l'abondance de l'espèce de bivalve fossile Myophoria (Costatoria) goldfussi Alberti 1830 (également présent dans le Membre des Erpilles sus-jacent).
- Historische Varianten
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Lumachellen mit Myophoria goldfussi (Genge 1958), Calcaire à Costatoria goldfussi (Bottéron 1961), Couches à C. goldfussi (Baud & Mégard-Galli 1975, Sartori 1990), Calcaires à goldfussi (Mégard-Galli & Baud 1977), «Couches à Costatoria goldfussi» (Sartori et al. 2006, Baud et al. 2016)
Beschreibung
- Beschreibung
-
sommet de la Formation de Champcella
- Mächtigkeit
- 15 m au Mont d'Or (Botteron 1961).
Komponenten
- Conodonta
- Bivalven
Myophoria (Costatoria) goldfussi, Sephardiella truempy (Hirsch)
Hierarchie und Abfolge
- Übergeordnete Einheit
Alter
- Alter Top
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- Frühes Ladinien
- Alter Basis
-
- Frühestes Ladinien
- Bermerkungen zu Basis
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Zone à Curionii: Sephardiella truempyi (Hirsch) = Fassanien
- Datierungsmethode
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Bivalves et conodontes (Hirsch) (Baud et al. 2016).
Geografie
- Typusprofil
-
-
Lyss Hütte (BE)
Merkmale des Ortes- Obergrenze
- Untergrenze
- typische Fazies
- Strassenanschnitt / Bahnanschnitt
- (2601820 / 1155740)
- Baud et al. 2016
-
Lyss Hütte (BE)
Paläogeografie und Tektonik
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- Briançonnais-Trias
- Paläogeografie
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Briançonnais Terrane
:
microcontinent briançonnais
- Tektonische Einheit (bzw. Überbegriff)
-
- Siviez-Mischabel
-
Médianes rigides
:
nappe des Préalpes Médianes rigides
Referenzen
- Neubearbeitung
-
2016) :
Revised middle Triassic stratigraphy of the Swiss Prealps based on conodonts and correlation to the Brianc¸onnais (Western Alps). Swiss J. Geosc. 109/2, 365-377
p.371: The ‘‘Couches à Costatoria goldfussi’’ form the bulk of the Balmi Member of the Pralet Formation in the Prealps (Fig. 3). Corresponding to the transgressive lower part of cycle CIII, it overlies undisturbed the Wiriehorn Formation (Champcella in the Briançonnais). These Costatoria goldfussi marker beds can be followed all the way down to the Mediterranean coast (Mégard-Galli and Baud 1977). It is most often dolomitized in the Western Alps. In the Seehorn section (Fig. 6), just north of the Rothorn thrust sheet, Genge (1958) described and illustrated Myophoria goldfussi, as well as Pectinids, Cyprinids, Dentalids and Aviculids. He also mentioned crinoids with Encrinus liliiformis and a Solenopora algae. Its faunal content in the Vanoise area of the French Alps has been described and illustrated by Ellenberger (1958). Among the bivalves, this author proposed the use of Myophoria goldfussi var. alpina as a marker. Bivalves comprise smooth Myophorids, Pachycardia and Trigonodus. Among gastropods figures Omphaloptycha (or Geinitzia) cf. escheri. Dolomitized ‘‘Couches à Costatoria goldfussi’’ are present in most of the Swiss Prealps ‘‘Préalpes médianes Rigides’’ thrust sheets (Botteron 1961; Genge 1958), but in the Eastern part of these Prealps they show rare but interesting limestone outcrops (Diemtigtal, sections 1, 2 and 3 in Figs. 5, 6). There, in-between dolomitic layers, the 5–10 m thick Costatoria goldfussi interval represents a level of lime-wackestone with some cherts in the lower part (Fig. 5), capped by crinoidal lime-packstone.
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