Schrambach formation
The Schrambach Formation , also known as Schrambach layers , is a lithostratigraphic formation of the Cretaceous and Upper Jura in the Northern Limestone Alps . The type locality is the Schrambachgraben , four kilometers south-southeast of Hallein . The Schrambach formation, like the Oberalm formation , is one of the classic aptych layers .
history
The term Schrambach layers was first used in 1854 by Marko Vincenc Lipold .
definition
In the Schrambachgraben the Schrambach Formation is underlain by the Oberalm Formation and is separated from it by the first appearance of sandy, weathered limestone. It is overlaid by the Roßfeld layers, with which it is also laterally interlocked. However, the transition to the Roßfeldschichten is not open to the type locality. At the type locality, the Schrambach formation is at least 142 meters thick. Lithologically, it is well-layered marl , marl limestone, limestone marl and limestone with light gray to greenish or blue-gray colors. At other locations, their thickness varies between a few meters and 400 meters. The Schrambach Formation can also be underlain by the Steinmühl Formation as in the Losensteiner Mulde, by the Ammergau Formation , with which it can also be laterally interlocked in the basal area, and, separated by a layer gap, by radiolarites , such as partially in the Area of the Lunzer ceiling. It is overlaid by the Lackbach layers , the Lech formation , the Anzenbach layers and the Tannheim layers .
The formation was not deposited everywhere at the same time under the same conditions, but occurred in different basin areas at different times, resulting in considerable differences in the lithology as well as in the deposition time.
Dating
The sedimentation of Schrambach formation took place at different times, the formation may already Tithonium use and to the Barremian up rich, as numerous ammonites discoveries , particularly in the area of Lower Austria and Upper Austrian Limestone Alps show.
Individual evidence
- ^ Geological map of the Republic of Austria 1.50.000, sheet 71, Ybbsitz , published by the Federal Geological Institute, Vienna 1988.
- ↑ Peter Faupl, Petr Skupien, Zdeněk Vašíček: Biostratigraphic data from the Schrambach and Tannheim Formations of the Frankenfelser Nappe of the Weyerer Arches (Lower Cretaceous, Upper Austrian Limestone Alps) . In: Mitt. Der Österreichischen Geologische Gesellschaft, 93 (2000), pages 7-13. PDF file
literature
Michael W. Rasser, Zdeněk Vašíček, Petr Skupien, Harald Lobitzer, Daniela Boorová: The Schrambach formation at the type locality (Lower Cretaceous, Northern Limestone Alps, Salzburg): Lithostratigraphic formalization and "historical" errors . In: WE Piller (ed.): Stratigraphia Austriaca , Verlag der Österreichischen Akademie der Wissenschaften, Vienna 2003, ISBN 3-7001-3180-1 , pages 193-216. PDF file