The Garschella Formation is an early Aptian to early Cenomanian geologic formation in the Alps of Austria, France, Germany and Switzerland.Garschella Formation at Strati.ch It preserves fossils dated to the Cretaceous period.
Description The 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 The 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.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.
See also List of fossiliferous stratigraphic units in Austria List of fossiliferous stratigraphic units in France List of fossiliferous stratigraphic units in Germany List of fossiliferous stratigraphic units in Switzerland
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