«Knorri-Ton»
Representation and status
- Color CMYK
- siehe Klingnau-Fm.
- Color RGB
- R: 175 G: 145 B: 115
- Rank
- lithostratigraphic Member (Subformation)
- Validity
- Unit is in Use
- Status
- incorrect name (though informally used)
- Status discussion
-
Bei Gonzalez (1993) als Formationsglied [= Member] des Hauptrogensteins definiert.
Nomenclature
- Deutsch
- «Knorri-Ton»
- Français
- «Argile à Knorri»
- Italiano
- «Argilla di Knorri»
- English
- «Knorri Clay»
- Origin of the Name
-
Namengebendes Fossil (Bivalvia): Ostrea (Catinulla) knorri (Voltz 1828/Zieten).
- Historical Variants
-
---- (Mühlberg 1898), Knorri-Tone (Müller et al. 1984, Gonzalez 1993), Knorri Clays = Knorri Tone = Argiles à Ostrea knorri (Gonzalez & Wetzel 1996)
Description
- Description
-
Dunkler Tonstein im Dach der Klingnau-Formation mit dünnen Lagen aus knolligem, feinkörnigem Kalk. Lokal tritt die Auster Ostrea Knorri im Gestein auf.
- Thickness
- Einige Meter (Gonzalez & Wetzel 1996).
Components
Fossil Content
- ostreids
Hierarchy and sequence
- Superordinate unit
- Units at roof
- Units at floor
Age
- Age at top
-
- middle Bathonian
- Age at base
-
- early Bathonian
Geography
- Geographical extent
- Ersetzt den Spatkalk östlich der Lägeren.
Palaenography and tectonic
-
- Dogger of the Jura Mountains
- Paleogeography
- Swabian Basin
- Tectonic unit (resp. main category)
-
-
Jura
:
Juragebirge
-
Jura
:
- Kind of protolith
-
- sedimentary
- Metamorphism
- non metamorphic
References
- Definition
-
(1996) :
Stratigraphy and paleogeography of the Hauptrogenstein and Klingnau Formations (middle Bajocian to late Bathonian), northern Switzerland Eclogae geol. Helv. 89/2, 695-720
p.705: The Knorri Clays replace the Spatkalk of the Hauptrogenstein Formation (see below) east of the Lägern Chain. They are a few meters thick and consist of dark clays with occasional layers of fine-grained, nodular limestone, locally with accumulations of the oyster Ostrea knorri.