Emmat-Formation
Back to Carungas NappeRepresentation and status
- Color CMYK
- (12%,0%,48%,18%)
- Color RGB
- R: 185 G: 210 B: 110
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- informal term
- Status discussion
Nomenclature
- Deutsch
- Emmat-Formation
- Français
- Formation d'Emmat
- Italiano
- Formazione d'Emmat
- English
- Emmat Formation
- Origin of the Name
-
Emmat (GR), Bivio
- Historical Variants
-
Neocom = Neocomschiefer = Neocomkalke und -schiefer (Stöcklin 1949), Roccabella-Schiefer (Dietrich 1970), Emmat-Serie (Finger 1978), Emmat Shales (Celâl Sengör 1982), Emmat-Schiefer (Lüdin 1987), Argille a Palombini = Emmat Series (Manatschal & Nievergelt 1997), Emmat-Formation (Furrer et al. 2015)
- Nomenclatorial Remarks
-
Piz d'Emmat
Description
- Description
-
Wechsellagerung von dunklen, kieseligen Tonsteinen und Mergeln und mikritischen Kalken. Einschaltungen aus Kalkareniten sowie Brekzien mit karbonatischen Klasten.
- Thickness
- 20-120 m in der Err-Decke, max. 30 m in der Platta-Decke (Manatschal & Nievergelt 1997).
Hierarchy and sequence
- Units at floor
Age
- Age at top
-
- Albian
- Note about top
-
Frühe Kreide?
- Age at base
-
- Aptian
- Note about base
-
Frühe Kreide?
Geography
- Geographical extent
- Carungas, Grevasalvas, Bardella, Nair (Err-Decke, Samedan-Zone).
- Type area
- Samedan-Zone
Palaenography and tectonic
- Tectonic unit (resp. main category)
- Kind of protolith
-
- sedimentary
References
- Definition
- (1978) : Die Zone von Samaden (Unterostalpine Decken, Graubünden) und ihre jurassischen Brekzien. Mitt. geol. Inst. ETH und Univ. Zürich (N.F.) 224
- Definition
-
(1997) :
A continent-ocean transition recorded in the Err and Platta nappes (Eastern Switzerland). Eclogae geol. Helv. 90/1, 3-27
p.9: calcareous slates, dark siliceous shales and calcarenites alternating with dark grey limestones (Argille a Palombini. Emmat Series of Finger [1978], Neocomschiefer of Stöcklin [1949] or Roccabella-Schiefer of Dietrich [1970]), about 20-120 m thick in the Err nappe and up to 30 m in the Platta nappe, overlie the Radiolarite Formation. Dietrich (1969) found planktonic foraminifera (Hedbergella sp. Planomalina sp.. Schackoina sp.. questionable Globigerinoides and Clavihedbergella sp.) within the Argille a Palombini yielding an Aptian to Albian age for the youngest dated rocks in the Piatta ophiolitic sequence.