«Calcaire âpre»
Back to SalèveRepresentation and status
- Color CMYK
- (21%,0%,12%,18%)
- Color RGB
- R: 165 G: 210 B: 185
- Rank
- petrographic facies
- Validity
- Unit is not in Use
- Status
- local name (informal)
Nomenclature
- Deutsch
- «Calcaire âpre»
- Français
- «Calcaire âpre»
- Italiano
- «Calcaire âpre»
- English
- «Calcaire âpre»
- Origin of the Name
-
âpre: rugueux, râpeux, dont la surface est inégale
- Historical Variants
-
calcaire âpre (Jaccard 1869, Ryniker 1923, Frei 1925, Rameil 2005), cell dolomite
Description
- Thickness
- max. 3-4 m
Hierarchy and sequence
- Superordinate unit
Palaenography and tectonic
- Tectonic unit (resp. main category)
-
-
Jura
:
Juragebirge
-
Jura
:
- Kind of protolith
-
- sedimentary
- Conditions of formation
-
Diagenèse vadose lors de longues périodes d'exposition subaérienne.
- Metamorphism
- non metamorphic
References
- Definition
-
2005) :
Carbonate sedimentology, sequence stratigraphy, and cyclostratigraphy of the Tithonian in the Swiss and French Jura Mountains: a high-resolution record of changes in sea level and climate GeoFocus 13, 246
Beginning at 140 m [in the Dôle section], parts of the carbonates are dedolomitized and show cornieule-texture. This recrystallization does not follow bed geometries and ends at 148 m with a surface showing prominent solution features. The cornieules are interpreted to result from vadose diagenesis during longer periods of subaerial exposure. These sediments correspond to the so-called “calcaire âpre” (Jaccard 1869). If present, they are used to delimit the top of “Portlandian”, respectively the Twannbach Formation (see Häfeli 1966, Thalmann 1966, Bläsi 1980).
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