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Fossils: radiolarians, spicula, foraminifera, ammonites (for details see Jacobshagen, 1965; Tollmann, 1976a; Ebli, 1997). Origin, facies: basinal, hemipelagic limestones. Chronostratigraphic age: Hettangian to late Middle Jurassic (?Bathonian to ?Callovian) according to Jacobshagen (1965), who includes the Vils Limestone equivalents into the Allgäu Formation (western part of the Northern Calcareous Alps). In the eastern part of the Northern Calcareous Alps the age range of the Allgäu Formation is according to Tollmann (1976a) Hettangian to Aalenian. Diachronous, in the type area the onset of the Allgäu Formation should start somewhere in the lower Early Jurassic (Jacobshagen, 1965, 1966; Tollmann, 1976a). In contrast, in the more basinal areas the onset of the Allgäu Formation is estimated as Hettangian (Tollmann, 1976a). Biostratigraphy: Planorbis zone to Aalenian or Bajocian (exact ammonite zone can not be defined). Thickness: normally around 100 metres; but in the type region the Allgäu syncline is more than 1.500 metres (Jacobshagen, 1958, 1965); with breccia intercalations in other regions (e.g., Mount Eisenspitze region) up to several 100 metres. Lithostratigraphically higher rank: non. Subdivision: lower, middle and upper part according to Jacobshagen (1965). Underlying units (footwall boundary): partly Adnet Formation, partly Rhaetian Dachstein Limestone, partly Kössen Formation. Overlying units (hangingwall boundary): Vils Limestone, several formations of Ruhpolding Radiolarite Group, mostly the Ruhpolding Formation.
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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! These cherty limestones reach as far as known at minimum the uppermost Sinemurian - Helmcke, 1969. Anyhow, this lithology (equivalent to the lower part of the Allgäu Formation) should be in future, after its reinvestigation, be separated from the Allgäu Formation and may probably be included in the Scheibelberg Formation (compare Ebli, 1997). In this case, the Sachrang Member could represent the lithological boundary between a lower and upper Allgäu Formation (compare Jenkyns, 1988). Jacobshagen (1965) include also the crinoidal-rich intercalations of middle Middle Jurassic age into the Allgäu Formation.
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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! In several horizons also different breccia layers should belong to the Allgäu Formation (e.g., Eisenspitz Breccia in the Lechtal Alps – see remarks there). Lavanter Breccia (Lavanter Brekzie) Validity: invalid; first mentionend by Schlager (1963), and v. Bemmelen & Meulenkamp (1965); description by Mariotti (1972a, b); analysed in detail by Blau (1987, 1994), and Blau & Schmidt (1988). Needs some revision and formalization. Type area: Lienzer Dolomiten, Amlacher syncline and Stadelwiese. Type section: ÖK 180 Lienz; Lienzer Dolomiten, a type-section was not designated by Blau & Schmidt (1988: Fig. 2). Reference section(s): not designated. Derivation of name: after the village Lavant, near the river Drau. Synonyms: unknown. Lithology: polymictic breccia; which consist of local material similar to the stratigraphic succession below (e.g., Hauptdolomite, different components of the Kössen Formation, Oberrhät Limestone, limestones of the Adnet Formation). A detailed description/documentation of the different components in the several mass-flows is missing until now (details in Blau, 1994). Partly with polyphase brecciating. Partly, the breccia can be interpreted as mass-flow deposits intercalated in grey bioturbated marly limestones of the Allgäu Formation.
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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! Fossils: different foraminifera (e.g., Blau, 1987), and some ammonites from the matrix on top the topographic highs (details in Blau & Schmidt, 1988). Some foraminifera from the components (e.g., Oberrhät Limestone). Some ammonites from the Allgäu Formation (e.g., Geyer, 1903; Cornelius-Furlani, 1953). Addionally bivalves, gastropods, radiolarians and spicula. Origin, facies: interpreted by Blau & Schmidt (1988) as breccia formed on top of topographic highs (graben flanks), and from there mobilized and transported as gravity flows or rock fall breccias into the adjacent, newly formed basin, where the Allgäu Formation was deposited. Chronostratigraphic age: ?Hettangian to Pliensbachian (Blau & Schmidt, 1988). Biostratigraphy: unknown in detail. Thickness: around 20 metres. In the basinal areas, where the mass-flows occur in the Allgäu Formation up to 250 metres (Blau & Schmidt, 1988). Lithostratigraphically higher rank: non. Subdivision: no subdivision. Underlying units (footwall boundary): Oberrhät Limestone. Overlying units (hangingwall boundary): Adnet Formation (Pliensbachian to Toarcian). Geographic distribution: only known from the type area.
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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! Dürrnberg Formation (Dürrnberg-Formation) Validity: valid; first description and definition by Gawlick et al. (2001). Type area: ÖK 93 Bad Reichenhall; ÖK 94 Hallein; blocks in the Sandlingalm Formation in the area Hallein-Bad Dürrnberg and Berchtesgaden, as well as in the Strubberg Formation east of the lake Königssee. Type section: on a forest road south of Mounts Barmsteine (for details see Gawlick et al., 2001). Reference section(s): the complete Dürrnberg Formation can only be reconstructed from different preserved, partly in time overlapping succession. The lower Dürrnberg Formation is visible in the Jakobberg gallery of the salt-mine Hallein-Bad Dürrnberg (Gawlick & Lein, 2000; Gawlick et al., 2001), but cannot be designated as reference section for the lower part of the Formation, in cause that the Jakobberg gallery is not any more open. The upper part of the formation is visible in the Teltschengraben, east of the town Bad Mitterndorf (O´Dogherty & Gawlick, 2008). Derivation of name: after the town Bad Dürrnberg south of Salzburg. Synonyms: detailed synonymy in Gawlick et al. (2001). | ||||||||||||
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