Summary
The Upper Triassic Dachsteinkalk of the Hochkönig Massif, situated 50 km south of Salzburg in the Northern Calcareous Alps, corresponds to a platform margin reef complex of exceptional thickness. The platform interior limestones form equally thick sequences of the well known cyclic Lofer facies. Sedimentation in the reef complex was not so strongly controlled by low-amplitude sea-level oscillations as was the Lofer facies. The westernmost of the 8 facies of the reef complex is an oncolite-dominated lagoon, in which wave-resistant stromatolite mounds with a relief of a few metres were periodically developed. The transition to the central reef area is accomplished across the back-reef facies. In the back-reef facies patch reefs and calcisponges appear. The proportion of coarse bioclastic sediment increases rapidly over a few hundred metres before the central reef area is encountered. The central reef area consists of relatively widely spaced small patch reefs that did not develop wave-resistant reef framework structures. The bulk of the sediment in the central reef area is coarse bioclastic material, provided by the dense growth of reef organisms and the wave-induced disintegration of patch reefs. Collapse of the reef margin is recorded by the supply of large blocks of patch reef material to the upper reef slope. Additionally, coarse, loose bioclastic debris was supplied to the upper reef slope and this was incorporated into debris flows on the reef slope and turbidites found at the base of the slope and in the off-reef facies. Partially lithified packstones and wackestones of the lower to middle reef slope were modified by mass movement to form breccia and rudstone sheets. The latter reach out hundreds of metres into the off-reef facies environment. A reef profile is presented which was derived by the restoration of strike and dip information. In conjunction with constraints imposed by sedimentary facies related to slope processes, the angle of slope in the reef margin area ranged from 11° to 5°, forming a concave (dished downwards) slope. Water depth estimations require that the central reef area did not develop in water of less than 10 metres depth. At the reef margin water depths were about 30 metres, at the base of the reef slope 200 metres and deepening in the off-reef facies to 250 metres. While previous work on reef complexes from this type of setting suggests growth in a heavily storm-dominated environment, the present author finds little evidence for the storm generation of the fore reef breccias, although there is good evidence for storm-influenced sedimentation and reworking in the central reef area.
Post-depositional processes were characterised by continued slope processes causing brecciation and hydraulic injection of red internal sediments downwards into the reef slope and off-reef limestones. Hydrothermal circulation caused a number of phases of post-depositional (diagenetic) brecciation. There appears not to have been an important period of emergence at the Triassic/Jurassic boundary.
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References
Bittner, A. (1884): Aus den Salzburger Kalkhochalpen. Zur Stellung der Hallstätter Kalke.—Verh. kaiserl.-königl. Geol. Reichsanstalt 1884,6, 99–113, Wien
Bosellini, A. (1989): Dynamics of Tethyan carbonate platforms.— In:Crevello, P., et al. (eds.): Controls on Carbonate Platform and Basin Development.—Soc. Econ. Paleont. Miner., Spec. Publ.44 3–13, Tulsa
Chappell, J. (1980): Coral morphology, diversity, and reef growth. —Nature286, 249–252, London
Droser, M.L. &Bottjer, D.J. (1986): A semiquantitative field classification of ichnofabric.—J. Sed. Petrol.56, 558–559, Tulsa
Enos, P. & Moore, C.H. (1983): Fore reef slope environment.—In:Scholle, P.A., Bebout, D.G. & Moore, C.H. (eds.): Carbonate Depositional Environments.—Amer. Ass. Petrol. Geol. Memoir33 507–537.
Fischer, A.G. (1964): The Lofer cyclothems of the Alpine Triassic. —In:Merriam, D.F. (ed.): Symposium on Cyclic Sedimentation. Kansas Geol. Surv. Bull.169 107–149.
— (1975): Tidal Deposits, Dachstein Limestone of the North-Alpine Triassic.—In:Ginsburg, R.N. (ed.): Tidal Deposits, A Casebook of Recent Examples and Fossil Counterpart.— 235–242, New York (Springer)
Flügel, E. (1962): Beiträge zur Paläontologie der nordalpinen Riffe. Neue Spongien und Algen aus den Zlambach-Schichten (Rhät): des westlichen Gosaukammes, Oberösterreich.—Ann Naturhistor. Musseum Wien65, 51–56, Wien
Flügel, E. (1981): Palaeoecology and facies of Upper Triassic reefs in the Northern Calcareous Alps.—In:Toomey D.F. (ed.): European Fossil Reef Moles.—Soc. Econ. Paleont. Miner. Spec. Publ.30, 291–359, Tulsa
Grammar, G.M. &Ginsburg, R.N. (1992): Highstand versus lowstand deposition on carbonate platform margins: insight from Quaternary foreslopes in the Bahamas.—Marine Geology103 125–136, Berlin
Goldhammer, R.K., Dunn, P.A. &Hardie, L.A. (1990): Depositional cycles, composite sea-level changes, cycle stacking patterns, and the heirarchy of stratigraphic forcing: Examples from Alpine Triassic platform carbonates.—Geol. Soc. Amer. Bull.102, 535–562, Boulder
Heissel, W. (1953): Zur Stratigraphie und Tektonik des Hochkönig (Salzburg).—Jb Geol. B.-A.96 344–356, Wien
Kobluk, D.R. &Lysenko, M.A. (1992): Stom features on a southern Caribbean fringing coral reef.—Palaois7:213–221, Tulsa
Longman, M.W. (1981): A process approach to recognising facies of reef complexes. In Toomey D.F. (ed.): European Fossil Reef Models.—Soc. Econ. Paleont. Miner., Spec. Publ.30, 9–40, Tulsa
Martire, L. (1992): Sequence stratigraphy and condensed pelagic sediments. An example from the Rosso Ammonitico Veronese, northeastern Italy.—Palaeogeography, Palaeoclimatology, Palaeoecology94, 169–192, Amsterdam
McIlreath, I.A. & James, N.P. (1978): Facies Models 12; Carbonate slopes.—Geoscience Canada 5/4 189–199.—Also inWalker, R.G. (ed.): 1979 Facies Models.—Geoscience Canada Reprint Series1, 133–149.
Mojsisovics, E. von (1874): Faunengebiete und Faciesgebilde der Trias Periode in den Ost-Alpen.—Jahrb. Kaiserl.-Königl. Geol. Reichsanstalt24/1, 81–134, Wien
Morrow, D.W. (1982): Descriptive field classification of sedimentary and diagenetic breccia fabrics in carbonate rocks.—Bull. Canadian Petrol. Geology30, 227–229, Calgary
Nicol, S.A. (1987): A down-slope Upper Triassic reef mound: Aflenz Limestone, Hochschwab Mountains, Northern Calcareous Alps.—Facies16, 23–36, Erlangen
Piller, W. (1981): The Steinplatte reef complex, part of an Upper Triassic Carbonate platform near Salzburg, Austria.—In Toomey D.F. (ed.): European Fossil Reef Models.—Soc. Econ. Paleont. Miner., Spec. Publ.30 261–290, Tulsa
Piller, W. &Lobitzer, H. (1979): Die obertriassische Karbonatplattform zwischen Steinplatte (Tirol) und Hochkönig (Salzburg). —Verh. Geol. Bundesanstalt1972/2, 171–179, Wien
Schäfer, P. (1984): Development of ecologic coral reefs during the latest Triassic (Rhaetian) of the Northern Limestone Alps.— Palaeontographica Americana54, 210–218
Schäfer, P. & Senowbari-Daryan, B. (1981): Facies development and paleoecologic zonation of four Upper Triassic patch reefs, Northern Calcareous Alps near Salzburg, Austria.—In:Toomey, D.F. (ed.): European Fossil Reef Models.—Soc. Econ. Paleont. Miner., Spec. Publ.30, 241–259, Tulsa
Stanton, R.J. &Flügel, E. (1987): Palaeoecology of Upper Triassic reefs in the Northern Calcareous Alps: Reef communities. —Facies16, 157–186, Erlangen
—— (1989): Problems with reef models: The Late Triassic Steinplatte “reef” (Northern Alps, Salzburg/Tyrol, Austria).— Facies20, 1–138, Erlangen
Toulmann, A. (1986): Geologie von österreich.—Volumes 1–3, Wien (Deuticke)
Tozer, E.T. (1990): How many Rhaetians?—Albertiana8, 10–13
Winterer, E.L., Metzler, C.V. &Sarti, M. (1991): Neptunean dykes and associated breccias (Southern Alps, Italy and Switzerland): Role of gravity sliding in open and closed systems.— Sedimentology38, 381–404
Zankl, H. (1968): Sedimentological and biological characteristics of a Dachsteinkalk reef complex in the Upper Triassic of the Northern Calcareous Alps.—In:Müller, G. &Friendman, G.M. (eds.): Recent developments in carbonate sedimentology in central Europe, 215–218 Berlin (Springer)
— (1969): Der Hohe Göll. Aufbau und Lebensbild eines Dachsteinkalk Riffes in der Nördlichen Kalkalpen.—Abh. Senckenberg. Naturforsch. Ges.519, 1–123, Frankfurt a. M. (Kramer)
Zankl, H. (1971): Upper Triassic carbonate facies in the Northern Limestone Alps.—In:Müller, G. (ed.): Sedimentology of parts of Central Europe.—Guidebook. 8th Intern. Sediment. Congress, Heidelberg 1971, 147–185
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Satterley, A.K. Sedimentology of the Upper Triassic reef complex at the Hochkönig Massif (Northern Calcareous Alps, Austria). Facies 30, 119–149 (1994). https://doi.org/10.1007/BF02536893
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DOI: https://doi.org/10.1007/BF02536893