«Grober Oolith»

Rappresentazione e statuto

Colore CMYK

siehe Hauptrogenstein

Colore RGB

R: 200 G: 170 B: 130

Rango

Strato litostratigrafico

Uso

Unità in uso.

Status

termine scorretto (informale)

Discussione del statuto

Bei Gonzalez (1993) als Formationsglied [= Member] definiert.

Nomenclatura

Deutsch

«Grober Oolith»

Français

«Oolithe grossière»

English

«Coarse Oncolite»

Varianti storiche

---- (Mühlberg 1898, Schmassmann 1945), Grober Oolith (Gonzalez 1993), Coarse Oncolite (Gonzalez & Wetzel 1996)

Links

Synonymi

Ferrugineus-Oolith

Descrizione

Potenza

ca. 1 m

Gerarchia e successione

Unità di rango superiore

• Hauptrogenstein [CH]

Unità sovrastante

• «Varians-Schichten»

Unità sottostante

• Couches de Movelier

Età

Geomorfologia

• primo Bathoniano

Età alla base

• Bajociano tardo

Osservazioni sulla base

Ende der Parkinsoni-Zone.

Metodo di datazione

Ammoniten: The sedimentation of the Coarse Oncolite started during the latest Parkinsoni Zone, and ended at the earliest Bathonian (early Zigzag Zone) as documented by many finds, for example Parkinsonia württembergica (Oppel) or Siemiradzkia aff. aurigera (Oppel). Therefore, the Bajocian/Bathonian boundary has to be set within the Coarse Oncolite. Representatives of the late Zigzag Zone have not been found within the Coarse Oncolite. (Gonzalez & Wetzel 1996)

Geografia

Estensione geografica

Vor allem im Baselbiet. Geht nach Westen in die Pierre Blanche über, nach Osten in der Spatkalk.

Regione-tipo

Basler Jura

Località-tipo

• St. Wolfgang (SO), bei Balsthal
  Coordinate
  • (2620300 / 1241525)
  Nota
  • Neudefinition bei Gonzalez (1993).

Paleogeografia e tettonica

• Dogger (Jura)

Termini generici

• Jura :
  Juragebirge

Tipo di origine

• sedimentaria

Metamorfismo

non metamorfo

Referenze

Revisione

Gonzalez R., Wetzel A. (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.709: The Coarse Oncolite replaces the "Spatkalk" in the western and central Jura (Fig. 3.4; synonyms: "Ferrugineus-" or "Ferruginea-Oolith": e.g.. Ernst 1989; "Grober Oolith"; "Oolite cannabine": Rollier 1911). It has a thickness of less than 1-3 m (values included in Fig. 5c). The lithology consists of oncomicritic wacke- to packstone.