Parai-Alba-Member

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Representation and status

Index
t3P
CMYK Color
-
RGB color
R: 135 G: 180 B: 185
Rank
lithostratigraphic Member
Validity
Unit is in Use
Status
informal term
SCS note
-
SCS date
-
Comment
Früher als eigenständige Formation betrachtet.

Nomenclature

German

Parai-Alba-Member

French
Membre de la Parai Alba
Italian
Membro della Parai Alba
English

Parai Alba Member

Origin of the Name

Parai Alba (= Weisse Wand) (GR), SSW Piz Chazforà im Val Mora

Historical Variants
Parai-Alba-Dolomit (Dössegger & Müller 1976, Dössegger 1987, Trümpy et al. 1997), untere Raiblerdolomite = Parai-Alba-Dolomite (Naef 1987), Parai-Alba Formation (Furrer et al. 1985), Parai-Alba-Dolomite (Frank 1986)
Nomenclatorial Remarks
-

Synonyms

Synonyms
Non-synonyms
Possible confusion

Description

Description
-
Geomorphology
-
Thickness
Von 25 m im nördlichen Engadiner Dolomit, bis 40 m im südlichen Engadiner Dolomit (Furrer et al. 1985). Ca. 50 m (Trümpy et al. 1997).

Components

Lithological content
  • dolostone
Mineral content
-
Fossil content
-

Hierarchy and succession

Superordinate unit
Subordinate units
Units at roof
    -
Units at floor
Lateral equivalents
Upper boundary
-
Lower boundary
Vallatscha-Fm.
Stratigraphic discussion
-

Age

Age at top
Ladinian
Note about top
-
Age at base
Ladinian
Note about base
-
Dating method

Biostratigraphie: seltene Kalklagen (Dasycladaceen) des Ladiniens (Furrer et al. 1985).

Geography

Geographical extent
Ofenpassgebiet (S-charl-Decke), Engadin, S-charl, Schlinig, Jaggl (Quattervals-Decke, Terza-Decke, S-charl-Decke), Valle Leverone, Federia Pian dei Morti (Languard-Decke), Tschirpen (Tschirpen-Decke), Uertsch, Toissa, Gualdauna, Bergün (Ela-Decke), Murtiröl, Mezzaun, Padella, Schlattain, Alv, Garone, Sassalbo (Bernina-Decke), Carungas, Grevasalvas, Bardella, Nair (Err-Decke). Fehlt in der Silvretta-Decke.
Type area
Type locality
  • Südhang des Piz Turettas (GR) bei Parai Alba
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Site accessibility
    • mountain ridge
    Coordinates
    • (2820825 / 1163575)
    Note
    • Furrer et al. 1985 (als Typlokalität deklariert)
Type profile
  • Südhang des Piz Turettas bei Parai Alba (GR)
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Site accessibility
    • mountain ridge
    Coordinates
    • (2820825 / 1163575 )
    Note
    • Furrer et al. 1985 (als Typlokalität deklariert): 820825/163575 bis 820750/163400
Reference profiles
-
Point of interest
-

Paleogeography and tectonic

Paleogeography
-
Kind of protolith
  • sedimentary
Conditions of formation
Very restricted inter- to supratidal environment with hypersaline water conditions (almost no bioturbation). The illitic interlayers are most probably of volcanic origin (tuffaceous silt- and mudstones, fine tuffs).
Sequence
-
Tectonic Unit (resp. main category)
Ela nappe Quattervals S-charl nappe Err nappe complex
  • Murtiröl :
    = Seja-Kristallin = Bugliauna-Schuppe
  • Err
  • Carungas nappe
  • Corvatsch
  • Chastelets
  • Bardella-Padella :
    ex Samedan-Zone rev.
Languard nappe Bernina nappe complex
  • Bernina
  • Mezzaun :
    = Müsella-Schuppe = Corn-Kristallin
  • Madulain :
    = Albula-Schuppenzone / Albula-Steilzone
  • Julier nappe
Tschirpen nappe Terza
Metamorphism
-
Metamorphic facies
-
Note on metamorphism
-

References

Revision
Frank Stephan Martin (1986): Die Raibl-Gruppe und ihr Liegendes im Oberostalpin Graubündens - die Entwicklung einer evaporitischen Karbonatplattform unter wechselnden Klimabedingungen ; transgressive "events" und frühcarnischer Vulkanismuc. , Mitt. Geol. Inst. ETH und Univ. Zürich (N.F.) 269, 239 S.

S.12: generell oben bzw. in den Unterengadiner Dolomiten
Important publications
-

Material and varia

Applications
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