Mezzaun-Member
Back to the listRepresentation and status
- Index
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- CMYK Color
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- RGB color
- R: 185 G: 135 B: 125
- Rank
- lithostratigraphic Member
- Validity
- Unit is in Use
- Status
- informal term
- SCS note
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- SCS date
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- Comment
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Nomenclature
- German
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Mezzaun-Member
- French
- Membre du (Piz) Mezzaun
- Italian
- Membro del (Piz) Mezzaun
- English
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Mezzaun Member
- Origin of the Name
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Piz Mezzaun (GR), Madulain
- Historical Variants
- Kieselschnurlias des Typus Mezzaun = Mezzaun-Lias (Roesli 1945), Mezzaun-Formation (Schüpbach 1974), Mezzaun-Schichten = Megazyklus der Val Chamuera (Eberli 1985), Mezzaun Beds (Furrer et al. 1985), Mezzaun-Schichten, Kieselige Kalke = Albula-Lias = Mezzaun-Member (Furrer et al. 2015)
- Nomenclatorial Remarks
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Synonyms
- Synonyms
- Non-synonyms
- Possible confusion
Description
- Description
- Resedimente ; Kalke mit Glimmersand und Echinodermenfragmenten (Trümpy et al. 1997). Furrer et al. 1985 p.30: Ferro-manganese bearing shales (Manganese Shales, 1-35 m) separate this cycle [Trupchun Beds] from a second megacycle of resediments (Mezzaun Beds, 100-350 m), which is found only in the west, in the Ela and Bernina nappe.
- Geomorphology
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- Thickness
- 10-350 m, 150 m an der Typlokalität (Furrer et al. 2015).
Components
Lithological content
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Mineral content
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Fossil content
- sponges
- trace fossils
- crinoids
Hierarchy and succession
- Superordinate unit
- Allgäu-Formation
- Subordinate units
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- Units at roof
- Units at floor
- Blaisun-Member
- Lateral equivalents
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- Upper boundary
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- Lower boundary
- Manganschiefer = Blaisun-Mb.
- Stratigraphic discussion
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Age
- Age at top
- Callovian
- Note about top
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- Age at base
- middle Toarcian
- Note about base
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- Dating method
- Cenoman [sic] (Staub 1946)
Geography
- Geographical extent
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- Type area
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- Type locality
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- Type profile
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Piz Mezzaun (GR)
Site particularities- typical facies
- mountain ridge
- (2794300 / 1160650)
- Eberli 1985: bis 2794550 / 1160450
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Piz Mezzaun (GR)
- Reference profiles
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Piz Blaisun (GR)
Site particularities- typical facies
- mountain ridge
- (2785550 / 1163000)
- Eberli 1985: bis 2785550 / 1163300
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Piz Blaisun (GR)
- Point of interest
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Paleogeography and tectonic
- Paleogeography
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- Kind of protolith
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- sedimentary
- Conditions of formation
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- Sequence
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- Tectonic Unit (resp. main category)
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Ela nappe
Bernina nappe complex
- Bernina
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Mezzaun
:
= Müsella-Schuppe = Corn-Kristallin -
Madulain
:
= Albula-Schuppenzone / Albula-Steilzone - Julier nappe
- Metamorphism
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- Metamorphic facies
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- Note on metamorphism
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References
- Definition
- Schüpbach M. A. (1974): Comparison of slope and basinal sediments of a marginal cratonic basin (Pedregosa Basin, New Mexico) and a marginal géosynclinal basin (southern border of Piemontais Geosyncline, Bernina Nappe, Switzerland). , PhD thesis, Rice Univ. (Houston, Texas)
- Revision
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Eberli Gregor Paul
(1985):
Die jurassischen Sedimente in den ostalpinen Decken Graubündens - Relikte eines passiven Kontinentalrandes.
,
Diss. ETH Zürich, 203 Seiten
S.164: Die Mezzaun-Schichten entsprechen der von Schüpbach (1974) definierten Mezzaun-Formation, deren Typlokalität am nemengebenden Berg, dem Piz Mezzaun liegt. Da die Mezzaun-Formation sich lithologisch und von ihrer Stellung im Liegenden der Radiolarite mit Teilen der Allgäu-Formation vergleichen lässt, wird die Mezzaun-Formation als Member in diese eingegliedert und neu als Mezzaun-Schichten bezeichnet.
- Important publications
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- Furrer Heinz (Ed.) (1985): Field workshop on Triassic and Jurassic sediments in the Eastern Alps of Switzerland. , Mitt. geol. Inst. ETH und Univ. Zürich (N.F.) 248, 81 S.
Material and varia
- Applications
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