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The coarse-grained final clastics were previously interpreted as a basal transgressive series (Schlagintweit, Gawlick & Missoni, unpublished data). Chronostratigraphic age: Kimmeridgian to Tithonian (?Lower Berriasian). Biostratigraphy: biostratigraphic data only available from the assemblages of benthic foraminifera and dasycladalean algae (Darga & Schlagintweit, 1991; Dya, 1992; Schlagintweit & Ebli, 2000; Schlagintweit, 2005). No data available from underlying or overlying units. Thickness: several 100 metres. Lithostratigraphically higher rank: Plassen Group. Subdivision: the former subdivision in the basal Lofer-Facies (or Lofer Member) and an upper unit, the Lärchkogel Limestone cannot be obtained any longer. Both, the basal part with its transition to the Sillenkopf Formation and the uppermost part with pronounced terrigeneous influx are similar in their lithology (but with different microfossil associations; Schlagintweit, Gawlick & Missoni, unpublished data), probably resulting from the misinterpretation as a transgressive succession. Underlying units (footwall boundary): Sillenkopf Formation in a proximal facies in the type area. Overlying units (hangingwall boundary): eroded.
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• Click on download to get complete and readable text • This is a free of charge document sharing network • First upload your own document, and you get a word document per email • No registration necessary, gratis Swap homeworks and notes at no charge! Gratis scripts for students and pupils! Remnants in the Salzkammergut (see chapter Agatha Limestone). Additional the sedimentary evolution of the succession is completely different, especially the final evolution during the Berriasian (drowning of the Plassen Formation sensu stricto in the north, emersion of the Lärchberg Formation in the south) (e.g., Gawlick & Schlagintweit, 2006; Missoni & Gawlick, in press). Oberalm Formation (Oberalm-Formation) + Barmstein Limestone (Barmsteinkalke)
Validity: valid; first description by Lipold (1854: 595 p.).
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• Click on download to get complete and readable text • This is a free of charge document sharing network • First upload your own document, and you get a word document per email • No registration necessary, gratis Swap homeworks and notes at no charge! Gratis scripts for students and pupils! History until 1976 in Tollmann (1976a). Revisited by Gawlick et al. (2005). Type area: ÖK 94 Hallein; Salzburg Calcareous Alps and Salzkammergut area. Type section: ÖK 94 Hallein; quarry “Adneter Riedel” near the town Oberalm, 12 km SSE of Salzburg for the Oberalm Formation; for Barmstein Limestone: Kleiner and Grosser Barmstein, 1 km NW of the city Hallein. Reference section(s): not designated. Derivation of name: ÖK 94 Hallein; town Oberalm near Hallein. Synonyms: Wurzen Limestone (“Wurzener Kalk”) of Plöchinger & Prey (1968); Tressenstein Limestone. Lithology: well-bedded grey limestones (bed-thickness mostly between 5-10 cm; but up to 70 cm); often with dark chert layers and nodules (see Schlager, 1953; Tollmann, 1976a). Fossils: Barmstein Limestones: dominating stromatoporoids (Fenninger, 1972; Steiger, 1981), rare corals, benthic foraminifera and calcareous algae (Steiger, 1981; Gawlick et al., 2005; Schlagintweit et al., 2004; Schlagintweit & Gawlick, 2006). Hemipelagic limestones of the Oberalm Formation: calpionellids, radiolarians (for details see Steiger, 1992). Origin, facies: basinal, hemipelagic limestones with mass-flows of shallow-water origin (Barmstein Limestone – Gawlick et al., 2005; revision of the type-locality. Chronostratigraphic age: Late Tithonian (Crassicollaria calpionellid-zone) to Early Berriasian (Calpionella calpionellid-zone). Biostratigraphy: Crassicollaria calpionellid-zone to Calpionella calpionellid-zone. Thickness: up to 700 metres in the type region. Lithostratigraphically higher rank: Plassen Group. Subdivision: no subdivision.
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• Click on download to get complete and readable text • This is a free of charge document sharing network • First upload your own document, and you get a word document per email • No registration necessary, gratis Swap homeworks and notes at no charge! Gratis scripts for students and pupils! Overlying units (hangingwall boundary): Schrambach Formation. Geographic distribution: in the central Northern Calcareous Alps; south and southeast of Salzburg (see Fenninger, 1967: Fig. 1; Tollmann, 1976a), probably also in the eastern Northern Calcareous Alps (see chapter Obersee Breccia). Lateral units: Plassen Formation. Remarks: the Oberalm Formation with the intercalated Barmstein Limestones is restricted to the geographic distribution of the Tauglboden Basin and its southern rim, the collapsing Trattberg Rise (Gawlick & Schlagintweit, 2009). Due to strong tectonics around the Early/Late Tithonian boundary also the northern part of the Trattberg Rise becomes at that time part of this basin. Other similar well-bedded, but much older (Kimmeridgian to Early Tithonian) cherty limestones in the Salzkammergut region (e.g., Mount Loser – Rasser et al., 2003; Mount Sandling – Gawlick et al., 2007a), or in the western Northern Calcareous Alps (e.g., Rofan Mountains – Wächter, 1987) must be revised and belong to another formations (e.g., Ammergau Formation in the western Northern Calcareous Alps).
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• Click on download to get complete and readable text • This is a free of charge document sharing network • First upload your own document, and you get a word document per email • No registration necessary, gratis Swap homeworks and notes at no charge! Gratis scripts for students and pupils! Ammergau Formation (Ammergau-Formation) + Seekarspitz Limestone Validity: valid; first description by Schafhäutl (1846: “Ammergauer Wetzstein-Schichten”); for the history until 1976 and definition see Tollmann (1976a); needs some revision and formalization. Seekarspitz Limestone introduced by Trauth (1950). Some modern investigations were caried out by Schütz (1979), Koch & Stengel-Rutkowski (1959), and Mohtat-Aghai (1999). Type area: ÖK 50 map sheet 86 Ammerwald; area around the town Ammergau (Bavaria) for the distal part of the Ammergau Formation. Type section: the type section is located at the Ammergau area (Austrian-German borderland). For the Seekarspitz Limestone Mount Seekarlspitze in the Rofan Mountains (ÖK 119 Schwaz). Reference section(s): reference sections of the distal part of the Ammergauer Formation are in the area around the Tegernsee (Germany). A desribed succession exists from the Tiefenbach estuary, east of the lake Tegernsee (Schafhäutl, 1846). For Seekarspitz Limestone see Wähner & Spengler (1935), Trauth (1950), and Wächter (1987). Derivation of name: after the Ammergau region in southern Germany (Bavaria). | ||||||||||||
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