ORIGIN OF THE CONCRETIONARY LIMESTONES IN THE ISTANBUL DEVONIAN SUCCESSION

Nodular limestone occurrences are widely present in the Devonian - aged sediments of the İstanbul region. This nodular units have been developed in the blue-grey coloured micritic limestones and marls alternation. The occurrences seen in the Lower-Middle Devonian strata are larger and the ones observed in the Upper Devonian sediments are smaller. The laboratory and field findings indicate that the nodules were developed within the. limestone-marl intercalation in which the thickness of the individual beds varies from 2-3 mm. to 5-6 cm. during the early diagenesis compaction, and loading and, later, by means of presure-solulion effects and, in part by tectonic deformation. No effects of organic activities and transportation have been detected. The size, shape and the order of the nodules are found depending on the thickness ratio of the individual beds in the limestone-marls intercalations.

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Bemoulli, D., 1972, North Atlantic and Mediterranean Mesozoic facies: Hollister, C.D., Hwing, J.I., eds, Initial reports of thc Deep Sea Drilling Project C. XI, U.S. Government Printing Office, Washington, 801-871.
Gandl, J., 1973, Trilobites from the Devonian of istanbul: Kaya, O., ed., Paleozoic of İstanbul, Ege Üniversitesi Mühendislik Fakültesi kitapları, No.40, 95,İzmir..
Garrison, P.E. ve Fisher, A.G., 1969, Deep-water limestones and radiolarites of the Alpine Jurassic: Friedman, G.M., ed, Depositional Environments in carbonati rocks. Spec. Publs. Soc. Econ. Paleont. Miner, 14, 20-56. Tulsa,
Haas. W., 1968, Das Alt Paleozoikum von Bithynien (Nordwest Türkei): N.Jb.Geol. Paleont. Abh., 131-2.60-68.
Hallam, A., 1967, Sedimentology and palaeographic significance of certain, red limestones and associated beds in thc Lias of thc Alpine region: Scott. J. Geol. 3. 195-220.
Hollmann, R., 1964, Subsolutions-Fragmente (Zur Bioslratinomie der Ammonoidea im Malm des Monie Baldo/Norditalien): Neues Jb. Geol. Palâont. Abh. 119, 22-82.
Hudson, J.D. ve Jenkyns, H.C., 1969, Conglomerates in the Adnet Limestones of Adnet (Austria) and the origin of the 'Scheck: Neues Jb. Geol. Palâont. Mh., 552-558.
Jenkyns, H.C., 1974, Origine of red nodular limestones (Ammonitica Rossa, Knellenkalke) in thc Mediterranean Jurassic: Spec. Publs. Int. Ass. Sediment. 1,249-271.
Kaya, O., 1973, Paleozoic of İstanbul: E.Ü.Mühendislik Fakültesi Kitaptan, No.40, 143. izmir.
Kennedy, W.J. ve Garrison, R.E., 1975, Morphology and genesis of nodular chalks and hardgrounds in the Upper Cretaceous of Southern England: Sedimentology, 22, 311-386.
Kullmann, J., 1973, Goniatite-Coral associations from the Devonian of İstanbul: Kaya, O., ed., Paleozoic of İstanbul, E.Ü.Mühendislik Fakültesi Kitapları, No. 40,97-110, İzmir.
Lucas, G., 1955 Caracteres geochimiques et mechaniqucs du milicu generateur des calcaires noduleux a facies ammonitico rosso: C.r.hebd, seanc. Acad. Sci., Paris, 240, 2000-2002.
Mullins, H.T. ve Neumann, A.C., 1979, Deep carbonate bank margin structure and sedimentation in the Northern Bahamas: SEPM, Spec. Publ., 27, 165-192.
Önalan, M., 1982, Pendik bölgesi ve Adaların Jeolojisi ve Sedimenter özellikleri: İ.Ü. Yerbilimleri Fakültesi (Doçentlik tezi), 156.
Önalan, M., (baskıda), İstanbul Devoniyen Çökellerinin Sedimenter özellikleri ve Çökelme Ortamları: İ.Ü.Mühendislik Fakültesi Yerbilimleri Dergisi.
Read, J.F., 1982, Carbonate platforms of passive (exlcnsional) Continental margins: Tectonophysics, 81, 195-212.
Tucker, M.E., 1974, Sedimentology of Paleozoic pelagic limestones: Thc Devonian Griolte (Southern France) and Cephalopodenkalk (Germany). Spec. Publs. Int. Ass. Sediment, l, 71-92.
Wilson, J.L., 1975, Carbonate facies in geologie history: Springer-Verlag Berlin Heidelberg New York, 471.
Wilson, J.L. ve Jordan, C., 1983, Middle shelf environments: Scholle, P.A., Bebount, D.G. ve Moor. CH., eds, Carbonate depositional environment, AAPG Memoir 33, Tulsa, Oklahoma, 303.
Zankıl, H., 1975, Personal communication with J. L Wilson: J. L Wilson ed., Carbonate facies in geologie history, S. 266, Springer-Verlag Berlin Heidelberg, New York.

ISSN: 0026-4563
Yayın Aralığı: Yılda 3 Sayı
Başlangıç: 1950
Yayıncı: Cahit DÖNMEZ

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