The Garschella Formation is an early Aptian to early Cenomanian geologic formation in the Alps of Austria, France, Germany and Switzerland.[1] It preserves fossils dated to the Cretaceous period.
| Garschella Formation | |
|---|---|
| Stratigraphic range: early Aptian-early Cenomanian | |
 | |
| Type | Formation |
| Underlies | Seewen Formation |
| Overlies | Schrattenkalk Formation |
| Thickness | up to 120 m (390 ft) |
| Lithology | |
| Primary | Limestone |
| Other | Sandstone |
| Location | |
| Region | Alps |
| Country | Austria Germany France Switzerland |
| Type section | |
| Named for | Garschella Plateau |
| Named by | Föllmi & Ouwehand |
| Year defined | 1987 |
Description
editThe Garschella Formation consists of glauconite- and apatite-bearing sandstones, limestones, marls and phosphorite layers.The Garschella Formation varies in thickness and can be up to 120 m thick. The rocks of the Garschella Formation can be bedded, often they are overgrown with moss and weather angularly. The bedding is often heavily fissured, with the fissures being almost perpendicular to the stratification.
Formation
editThe change from the Schrattenkalk Formation to the Garschella Formation was caused by a transgressive phase in which the carbonate production was severely restricted by the changing ocean currents.[2]
See also
editReferences
edit- ↑ Garschella Formation Archived 2018-08-15 at the Wayback Machine at Strati.ch
- ↑ Ouwehand, P. J. (1987). Die Garschella-Formation ("Helvetischer Gault", Aptian-Cenomanian) der Churfirsten-Alvier Region (Ostschweiz): Sedimentologie, Phosphoritgenese, Stratigraphie (Dissertation Nr. 8409). Eidgenössische Technische Hochschule Zürich.
External links
edit- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.
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