«Varians-Schichten»
Back to «Knorri-Ton»Representation and status
- Index
- i2v-i3
- Color CMYK
- N/A
- Color RGB
- R: 125 G: 125 B: 125
- Rank
- lithostratigraphic Member (Subformation)
- Validity
- Unit is not in Use
- Status
- obsolete term (disused)
- Status discussion
Nomenclature
- Deutsch
- «Varians-Schichten»
- Français
- «Couches à Varians»
- Italiano
- «Strati a Varians»
- English
- «Varians Beds»
- Origin of the Name
-
Namengebendes Fossil: Brachiopodenart "Rhynchonella" varians Schl. = Rhynchonelloidella alemanica (Rollier 1911)
- Historical Variants
-
Variansschichten (Moesch 1867, Tobler 1896, Tobler 1905 Tab.5a-b/6a-b, Disler 1941), Varians-Schichten = Calcaire roux-sableux (Mühlberg 1900), Variansschichten = Cornbrash (Baltzer 1906), Spinosa-Varians-Schichten (Buxtorf 1908)
Description
- Description
-
Grauer, zäher Kalkmergel reich an Bryozoen an der Basis, Danach, neben spätigen Kalkbänken und ruppigen Kalkmergeln treten eisenoolithische und eisenschüssige Lagen. Die obersten, in Knauer aufgelösten Bänke sind angebohrt und stark limonitischberindet.
- Thickness
- einige m ; ca. 6 m
Components
Fossil Content
- rhynchonellids
- ostreids
Rhynchonella varians, Ostrea knorri
Hierarchy and sequence
- Superordinate unit
- Units at roof
- Units at floor
- Upper boundary
-
Makrocephalus-Schichten
- Lower boundary
-
Hauptrogenstein
Age
- Age at top
-
- Callovian
- Age at base
-
- Callovian
- Dating Method
-
Ammoniten
Palaenography and tectonic
-
- Dogger of the Jura Mountains
- Tectonic unit (resp. main category)
-
-
Jura
:
Juragebirge
-
Jura
:
- Kind of protolith
-
- sedimentary
- Metamorphism
- non metamorphic