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Schrambach Formation in the Eastern Alps area is conceived from the lithological and stratigraphical point of view rather non-uniform. Therefore a 200 m thick section in the type locality of the Schrambach Formation, situated south of Salzburg, is documented in this study. The studied sequence in the Schrambachgraben seems to be in the prevailing part of section in simple, monoclinal mode of deposition. The opposite is true. The section studied begins with the Oberalm Formation, passes gradually into the Schrambach Formation and ends with the lower part of the Rossfeld Formation. According to our detail results, deposits of the Schrambach Formation in this type of section occur in a minimum of three tectonic slices. The first tectonic slice is composed of a transitional sequence of the Oberalm Formation to the Schrambach Formation. The uppermost part of the Oberalm Formation is dated as the Middle Berriasian Calpionella Zone (Elliptica Subzone). According to calcareous dinoflagellates, the lower part of the stratal sequence of the Schrambach Formation belongs to the Fusca Acme Zone, which corresponds to the early part of the Late Berriasian. According to the occurrence of the calpionellids Calpionellites uncinata, Cts. darderi and Cts. major, the second slice belongs to the Early Valanginian. With respect to occurrences of ammonites and non-calcareous dinoflagellates findings, the tectonic slice belongs to the higher Late Berriasian Subthurmannia boissieri ammonite Zone. Czech Republic; zdenek.vasicek@ugn.cas.cz • Harald Lobitzer, Lindaustraße 3, A 4820 Bad Ischl, Austria In the years 2000-2001 we studied and documented Lower Cretaceous sequence in the type locality of the Schrambach Formation situated in the area of Schrambachgraben in the area of Salzburg. The first results of this study (Rasser et al. 2003) we focused also on an overview of previous studies into the Schrambachschichten and on the hitherto concept of the Schrambach Formation.In addition, the type locality of the Schrambachschichten, its stratigraphy and lithostratigraphy, geological and depositional conditions, macro-and micropaleontology with microfacies are described in detail here, along with designation of sampling points for thin sections and microanalyses.The goal of the study submitted is primarily to provide detailed biostratigraphy of the Schrambach Formation in the type locality. Our microbiostratigraphic research focuses on the study of calpionellids and calcareous and non-calcareous dinoflagellates. Ammonites and aptychi,

Abstract:The production of platform carbonates of the Manín Unit (Manín Straits, Central Western Carpathians) belonging to the Podhorie and Manín formations and formed by remains of rudists and benthic foraminifers (Urgonian-type carbonates), was previously assumed to terminate during the Aptian. First, we show that these deposits were primarily formed on the upper slope (Podhorie Formation) and in a fore-reef environment (Manín Formation). Second, biostratigraphic data indicate that the shallow-water production persisted up to the Albian, just as it did in another succession of the Manín Unit. The Podhorie Fm contains colomiellids (Colomiella recta, C. mexicana) and calcareous dinoflagellates (Calcisphaerula innominata) that indicate the Albian age. It also contains planktonic foraminifers (Ticinella roberti, Ticinella cf. primula, Ticinella cf. madecassiana, Ticinella cf. praeticinensis) of the Albian Ticinella primula Zone. The Podhorie Formation passes upwards into peri-reefal facies of the Manín Fm where we designate the Malý Manín Member on the basis of rudists shell fragments and redeposited orbitolinids. Microfacies associations share similarities with the Urgonian-type microfacies from Mediterranean Tethys and allow us to restrict the growth and the demise of the carbonate platform. δ 13 C and δ 18 O isotopes change over a broad range of both formations: δ 13C is in the range +1.03 to +4.20 ‰ V-PDB and δ 18O is in the range −0.14 to −5.55 ‰ V-PDB. Although a close correlation between δ 13 C and δ 18 O indicates diagenetic overprint, a long-term increase of δ 13C can indicate a gradual increase in the aragonite production and/or increasing effects of oceanic water masses in the course of the Albian, prior to the final platform drowning. Carbonate platform evolution was connected with submarine slumps and debris flows leading to redeposition and accumulation of carbonate lithoclasts and bioclastic debris on the slope. Our study confirms that the growth of carbonate platforms in the Central Western Carpathians was stopped and the platform collapsed during the Albian, in contrast to the westernmost Tethys. A hardground formed during the Late Albian is overlain by Albian -Cenomanian marls of the Butkov Formation with calcisphaerulid limestones characterized by planktonic foraminifers of the Parathalmanninella appenninica Zone and calcareous dinoflagellates of the Innominata Acme Zone.

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