«Grober Oolith»
Representation and status
- Color CMYK
- siehe Hauptrogenstein
- Color RGB
- R: 200 G: 170 B: 130
- Rank
- lithostratigraphic Bed
- Validity
- Unit is in Use
- Status
- incorrect name (though informally used)
- Status discussion
-
Bei Gonzalez (1993) als Formationsglied [= Member] definiert.
Nomenclature
- Deutsch
- «Grober Oolith»
- Français
- «Oolithe grossière»
- English
- «Coarse Oncolite»
- Historical Variants
-
---- (Mühlberg 1898, Schmassmann 1945), Grober Oolith (Gonzalez 1993), Coarse Oncolite (Gonzalez & Wetzel 1996)
Links
- Synonyms
Description
- Thickness
- ca. 1 m
Hierarchy and sequence
- Superordinate unit
- Units at roof
- Units at floor
Age
- Age at top
-
- early Bathonian
- Age at base
-
- late Bajocian
- Note about base
-
Ende der Parkinsoni-Zone.
- Dating Method
-
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)
Geography
- Geographical extent
- Vor allem im Baselbiet. Geht nach Westen in die Pierre Blanche über, nach Osten in der Spatkalk.
- Type area
- Basler Jura
- Type locality
-
-
St. Wolfgang (SO), bei Balsthal
Coordinates- (2620300 / 1241525)
- Neudefinition bei Gonzalez (1993).
-
St. Wolfgang (SO), bei Balsthal
Palaenography and tectonic
-
- Dogger of the Jura Mountains
- 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.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.