Grünten-Member
Back to Anzeinde nappeRepresentation and status
- Index
- c6G
- Color CMYK
- (0%,38%,38%,6%)
- Color RGB
- R: 240 G: 150 B: 150
- Rank
- lithostratigraphic Member (Subformation)
- Validity
- Unit is in Use
- Status
- valid formal name
- Scs Note
-
Angenommen.
- Scs Date
- 19.10.2006
- Status discussion
Nomenclature
- Deutsch
- Grünten-Member
- Français
- Membre du Grünten
- Italiano
- Membro del Grünten
- English
- Grünten Member
- Origin of the Name
-
Grüntengipfel (Allgäu) NE Sonthofen
- Historical Variants
-
Grüntenschichten p.p. (Heim 1919, 1933), Grünten-Schichten (Gebhard 1983, 1985), Grünten-Member (Bollinger 1988), Grünten Member = upper Orbitolina Beds (Föllmi et al. 2007)
Description
- Description
-
... marly base, gradually passing into sandy limestones and finally to crinoidal-bryozoan limestones. "Das Grünten-Member besteht aus siltig-sandigen, schwach glaukonitischen, kalkigen, zu schiefriger Ausbildung neigenden Mergeln sowie mittelbankigen, schwach sandigen, glaukonitführenden, spätig bioklastischen Kalken von bräunlich-grauer Anwitterung…" S.30
- Thickness
- 5-7 m; max. ca. 35 m (Föllmi et al. 2007)
Components
- glauconite
- crinoids
- bryozoans
- orbitolinids
Hierarchy and sequence
- Superordinate unit
- Units at roof
- Units at floor
Age
- Age at top
-
- Early Aptian
- Note about top
-
furcata-Zone (Gainon 2001, Linder et al. 2006, Föllmi et al. 2007)
- Age at base
-
- Early Aptian
- Note about base
-
deshayesi-Zone (Gainon 2001, Linder et al. 2006, Föllmi et al. 2007)
- Dating Method
-
Biostratigraphie: Ammoniten in der hangenden Luitere-Schicht.
Geography
- Geographical extent
- Nur im distalen Bereich des Helvetikums in Allgäu, Vorarlberg und Zentralschweiz.
- Type area
- Grünten (Allgäu, D)
Palaenography and tectonic
- Kind of protolith
-
- sedimentary
- Metamorphism
- non metamorphic
References
-
Selli level (OAE 1a)
- Name Origin
-
Named after the Italian geologist Raimondo Selli (1916-1983).
- Rank
- Oceanic Anoxic Event
- Status
- valid
- In short
-
Oceanic anoxic event at the base of the Aptian (around 120 Ma ago) with a major impact on the chemistry of the oceans worldwide.
- Age
- Early Aptian
-
Oberer Teil des Grünten-Members
- Rank
- lithostratigraphic unit
- Status
- incorrect name (though informally used)
-
Banc du Col de la Plaine Morte
- Name Origin
- Rank
- lithostratigraphic Bed
- Status
- local name (informal)
- Valid term
- Luitere-Bank Gruenten-Member
- In short
-
Niveau noduleux phosphaté à rares ammonites d'occurrence locale, soulignant une limite de séquence au sein du Membre du Grünten. Ce niveau se confond ailleurs avec le Banc du Luitere (à la base du Membre de la Brisi).
- Age
- Early Aptian
-
Unterer Teil des Grünten-Members
- Rank
- lithostratigraphic unit
- Status
- incorrect name (though informally used)
-
Rohrbachstein-Bank
- Name Origin
-
Westflank des Rohrbachsteins (VS)/(BE), Rawilgebiet
- Rank
- lithostratigraphic Bed
- Status
- informal term
- In short
-
Im Gelände gut abtrennbare Basisschicht des Grünten-Members in distalen Bereichen des Helvetikums. Grobkörniger, oft glaukonitführender Kalkarenit.
- Age
- Early Aptian