Kaiseraugst-Formation

Rappresentazione e statuto

Index

tKa [mu1]

Colore CMYK

10 / 40 / 75 / 0

Colore RGB

R: 225 G: 160 B: 80

Rango

Formazione litostratigrafica

Uso

Unità in uso.

Status

termine formale valido

SCS nota

Name und Konzept genehmigt.

SCS data

22.11.2014

Discussione del statuto

Nomenclatura

Deutsch

Kaiseraugst-Formation

Français

Formation de Kaiseraugst

Italiano

Formazione di Kaiseraugst

English

Kaiseraugst Formation

Origine del nome

Rheinufer bei Kaiseraugst (AG)

Varianti storiche

«Unterer Muschelkalk» auct., «Wellengebirge» auct., Kaiseraugst-Formation (Jordan 2016)

Nota sul nome

The Kaiseraugst Formation corresponds to the «Wellengebirge» as it was interpreted in the Swiss stratigraphic scheme (e.g. Mu¨ ller et al. 1984, see also Fig. 3). It includes the basal «Wellendolomit», the «Wellenkalk» or «Wellenmergel», and the «Orbicularismergel» on top. In Germany, all three units are considered as own formations whereby the uppermost Karlstadt Formation is part of the Middle Muschelkalk Subgroup while the other two, Freudenstadt Formation and Jena Formation, form the Lower Muschelkalk Subgroup (Hagdorn and Simon 2005).

Descrizione

Descrizione

Dolomit, Kalkstein, Mergel und Tone, oft reich an Invertebraten Fossilien, typischerweise Rippelmarken und z.T. bituminös.

Potenza

5 - 60 m (Jordan 2016)

Componenti

• mica

bituminös

• ammoniti
• gasteropodi
• echinodermi
• brachiopodi
• bivalvi

Fossilführend: Ceratiten (Beneckeia buchi), Nautiliden, Neoschizodus (ex Myophoria) orbicularis.

Gerarchia e successione

Unità di rango inferiore

• «Orbicularis-Mergel»
• Wellenkalk / Wellenmergel
• Wellendolomit

Unità sovrastante

• Zeglingen-Formation (Anhydritgruppe)

Unità sottostante

• Dinkelberg-Formation

Limite superiore

Stratigraphischer Kontakt zur Zeglingen-Fm.: Einsetzen der evaporitischen Fazies (oftmal mit massiver basalen Anhydritbank) und der Corrensite bei der Ton-Mineralogie.

Limite inferiore

Nicht konformer, transgressiver, stratigraphischer Kontakt zur Dinkelberg-Fm.

Età

Geomorfologia

• Anisico

Età alla base

• Anisico

Metodo di datazione

Siehe Hagdorn & Simon 2005, Geyer et al. 2011

Geografia

Estensione geografica

Nordschweiz, ausser Bodensee-Gebiet.

Regione-tipo

Unteres Hochrhein-Gebiet zwischen Basel und Schwaderloch (AG)

Località-tipo

• Kaiseraugst (AG)
  Caratteristiche del sito
  • typische Fazies
  Agibilità del sito
  • Bachprofil
  • unzugängliches Gelände
  Coordinate
  • (2621500 / 1265770)
  Nota
  • Rheinufer (beidseitig) (Disler 1914 Profile VI-VIII ; Jordan 2016)

Sezione-tipo

• Warmbach (Deutschland)
  Caratteristiche del sito
  • typische Fazies
  Agibilità del sito
  • Bachprofil
  • unzugängliches Gelände
  Coordinate
  • (2622750 / 1266000)
  Nota
  • Rechtes Rheinufer (Disler 1914 Profil VII ; Jordan 2016)
• Junkholz (AG)
  Caratteristiche del sito
  • typische Fazies
  Agibilità del sito
  • Bachprofil
  • unzugängliches Gelände
  Coordinate
  • (2622800 / 1265775)
  Nota
  • Linkes Rheinufer (Disler 1914 Profil VIII ; Jordan 2016)
• Augarten (AG)
  Caratteristiche del sito
  • typische Fazies
  Agibilità del sito
  • Bachprofil
  • unzugängliches Gelände
  Coordinate
  • (2623640 / 1265975)
  Nota
  • Linkes Rheinufer (Disler 1914 Profile VI ; Jordan 2016) ; z.T. überflutet

Sezione di riferimento

• Kaisten (AG)
  Caratteristiche del sito
  • Obergrenze
  • Untergrenze
  Agibilità del sito
  • Bohrkern
  Coordinate
  • (2644642 / 1265624)
  Nota
  • Drilling metre 46.40–94.00 (Peters et al. 1989): not fully cored and some core losses; but base and top—in a close to bedrock surface situation—are preserved. Nagra core store facility

Punti d'interesse

• Riniken (AG)
  Caratteristiche del sito
  • Obergrenze
  Agibilità del sito
  • Bohrkern
  Coordinate
  • (2656605 / 1261780)
  Nota
  • The transition from the overlying Schinznach Formation to the Kaiseraugst Formation (extending from drilling metre 749.44–793.90) is fully cored, but the rest of the formation is not cored. Nagra core store facility

Paleogeografia e tettonica

• Trias (Jura)
• Triassico medio

Paleogeografia

Rheingraben

Termini generici

• Jura :
  Juragebirge

Tipo di origine

• sedimentaria

Condizioni di formazione

The sequence documents the build-up of a connection between the northern Central European Basin (Germanic Basin) and the Tethys Ocean. This marine strait follows a proto-Rhenish depression (Hagdorn & Nitsch 2009).

Sequenza

The sequence documents the setting up of a connection between the northern Central European Basin and the Tethys ocean. The NNE to SEE tending axis of this ‘‘Swabian seaway’’ can be localized east of today Black Forest reaching Northern Switzerland in the Schaffhausen area. It is charcterized by the domination of limestone facies during the maximum flooding while in lateral domains dolomite and siliclastic intercalations are more abundant (Hagorn and Nitsch 2009).

Metamorfismo

non metamorfo

Referenze

Definizione

Jordan Peter (2016) : Reorganisation of the Triassic stratigraphic nomenclature of northern Switzerland: overview and the new Dinkelberg, Kaiseraugst and Zeglingen formations. Swiss J. Geosci. 109/2, 241-255

Dolomite, (crinoidal) limestone, marl and shale, often rich in marine invertebrate fossils. Some levels contain galenite, sphalerite, chalcopyrite etc. (Hofmann 1985; Hofmann et al. 2000). In some levels, ripple marks are found. Horizons with dolocretes, desiccation cracks and roots document periods of emergence.

In general, the sedimentary succession starts with a transgressive sequence including partly sandy dolomite in alternation with dolomitic marl. The high stand is documented by an alternation of marl and subordinate limestone. The succession ends with bituminous shale. The overall transgressive–regressive cycle is superimposed by different subcycles (e.g. Götz 2002).

The fossil record includes cephalopods (ceratitida as Beneckeia buchi and nautilids), bivalves, gastropods, brachiopods, echinoderms. A typical fossil in the bituminous upper part is the bivalve Neoschizodus orbicularis (Myophoria orbicularis in old literature). See Disler (1914) for a comprehensive fossil list.

Pubblicazioni importanti

Jordan Peter (2016) : Reorganisation of the Triassic stratigraphic nomenclature of northern Switzerland: overview and the new Dinkelberg, Kaiseraugst and Zeglingen formations. Swiss J. Geosci. 109/2, 241-255

Disler Carl (1914) : Stratigraphie und Tektonik des Rotliegenden und der Trias beiderseits des Rheins zwischen Rheinfelden und Augst. Verhandlungen der Naturforschenden Gesellschaft in Basel 25, 1-96

Materiale e vario

gelb, grünlich

15200139