Biostratigraphy and Paleontology of the Medik-Ebreme (NW Malatya) Area

Yıl 1986, Cilt: 105-106 Sayı: 105-106, 15 - 53, 01.10.1986

Sefer Örçen

Öz

This paper deals with paleontology and biostratigraphy of the sedimentary rocks in the vicinity of Medik-Ebreme area located northwest of Malatya. The age of the formations of the area range from Upper Jurassic to the Quaternary. Horasançay formation, Upper Jurassic to Lower Cretaceous in age, consists essentially of micrites and dolomitic limestones deposited on the open shelf. The unconformably overlying Medik formation is represented by conglomerates with mudstone interbeds deposited in an alluvial fan of Paleocene age. The Medik formation is unconformably overlain by the Tohma formation, Middle-Upper Eocene in age, and consists of conglomerates, sandstones and alternations of limestones and marls deposited in lagoonal, beach and shallow marine (shelf) environments. Çavuş formation consisting of clastic limestones deposited on the shallow shelf, sits unconformably on the Tohma formation and is of Aquitanian age. This sequence is unconformably succeeded by the Ansurçay formation, Burdigalian in age, consisting mainly of clastic limestones, marls and reefal limestones. Mısırdere formation, consisting of conglomerates, sandstones and mudstones, was laid down in environments of alluvial fans and braided streams. The following biozones were defined on the basis of paleontologic data: the Velates schmiedeli biozone in Lower Lutetian; the Nummulites pinfoldi biozone in Middle Lutetian; the Nummulites aturicus biozone and Nummulites perforatus subbiozone in Upper Lutetian; the Nummulites fabianii biozone and Chapmanina gassinensis subbiozone in Lower Priabonian; the Miogypsinoides complanatus biozone in Aquitanian; the Miogypsina irregularis biozone and Miogypsina intermedia biozone in Burdigalian. These biozones were matched,  biostratigraphically and chronostratigraphically, with their
equivalents in Turkey and in other parts of the world.

Anahtar Kelimeler

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Kaynakça

• Boussac, J., 1911, Etudes stratigraphique et paleontologique sur le Nummulitique de Biarritz: Ann. Hebert, 5, 96.
• Bronnimann, P., 1940, Uber die tertiaren Orbitoididen und die Mrogypsiniden von Nordwest Marokko: Schweiz., Pal. Abh., 63, 1-113.
• Castellarin, A. and Cita, M.B., 1969, Etude de quelques de coupes priaboniennes dans le Monte Baldo (Prov. Verona et Trento, Italie) et discussion des limites de l'etage: Colloque Eocene, Mem. Bul. Rech. Geol. Min., Fr., 69 119-143.
• Cavelier, C., 1968, Le Paleogene des forages de Marcoussis (Essonne): Colloque Eocene, Mem. Bul. Rech. Geol. Min., Fr., 58, 389-400.
• Cita, M.-B., 1969, Le Paleocene et l'Eocene de l'Italie du Nord: Colloque Eocene, Mem. Bul. Rech. Geol. Min., Fr., 69, 417-428.
• Dacı, A., 1951, Etude paleontologique entre Küçükçekmece et Çatalca: Publication of University of Istanbul, Faculty of Sciences, B, XVI, 3, I, 89-112; II, 207-246.
• Dacı-Dizer, A., 1953, Contribution a 1'etude paleontologique du Nummulitique de Kastamonu: Pub. of Univ. of İstanbul, B, XVIII, 34, 207-299.
• Davies, L.M., 1940, The Upper Khirthar beds of north-west India: Geol. Soc. London, Quart., Journ., London, 96. 209.
• Dizer, A., 1962 a, Les foraminiferes de l'Eocene et l'Oligocene de Denizli: Pub. of Univ. of İstanbul, Fac. of Sciences, B, XXVII, 1-2, 39-47.
• , 1962 b, Foraminifera of the Miocene of the Sivas basin (Turkey): Publications of University of İstanbul, Faculty of Sciences, B, XXVII, 1-2, 49-83.
• , 1982, Paleogeography and some foraminifera of the Tertiary period: To the memory of Prof. Dr. Ümit Yaşar Doğanay, 251-291, Pub. of Univ. of İstanbul, Faculty of Political Sciences, Istanbul (in Turkish).
• Drooger, C.W., 1951, Study of American Miogypsinidae: Univ. Utrecht Thesis, 90 p., Zeist., Netherlands.
• and Magne, J., 1959, Miogypsinids and planctonic foraminifera of the Algerian Oligocene and Miocene: Micro- paleontology, 5, 273-284.
• Dudich, E.; Gidai, L.; Kecskemeti, T. and Kopek, G., 1968, Quelques problemes actuels de l'Eocene dans la montagne centrale transdanubienne (Hongrie): Colloque Eocene, Mem. Bul. Rech. Geol. Min., Fr., 58, 675-682.
• Flandrin, J., 1938, Contribution a l'etude paleontologique du Nummulitique Algerien: Mat. pour la Carte Geol. Algerie, 1. serie Pal., 8,7, 7-155.
• Hanzawa, S., 1957, Cenozoic Foraminifera of Micronesia: Geol. Soc. Amer. Mem., 66, 1-163. Harpe, P.DL., 1883, Nummulites de la Suisse: Mem. Soc. Pal. Suisse, X, VII, 27-32.
• Hedberg, D.H., 1975, International Stratigraphic Guides: Translation of İ.E. Altınlı, 116 p. TPAO Earth Sciences Publication, Ankara (in Turkish).
• Henson, I.R.S., 1950, Cretaceous and Tertiary deef formation and associated sediments in the Middle East: Bull, Am. Ass. Petrol. Geol., 34, 215-238.
• Hottinger, L.; Lehmann, R. and Schaub, H., 1964, Donnees actuelles sur la biostratigraphie du Nummulitique Mediterraneen: Mem. Bul. Rech. Geol. Min., Fr., 28, 611-652.
• lonesi, L., 1971, Flişul Paleogen dm bazinul vail Moldovei: 238 p. Edit. Acad. Soc. Romania, Bucureşti.
• Joly, N. and Leymerie, A., 1848, Memoire sur les Nummulites considerees zoologiquement et geologiquement: Acad. Roy. Sci. Inscr. Belles-Lettres Toulouse, Mem., 3, 4, 171-218.
• Kurtman, F., 1978, Geology and tectonic aspects of the Gürün region: MTA Bull., 91, 1-12 (in Turkish).
• Lemoine, P. and Douville, R., 1904, Sur le genre Lepidocyclina Gümbel: Soc. Geol. France, Mem. Pal. Paris, 12, 2, 32, 1-141.
• Margarel, J.-P., 1968, Les petites foraminiferes de 1'Eocene de l'Quest de la France et leur interes stratigraphique: Colloque Eocene, Mem. Bul. Rech. Geol. Min., F., 58, 93-99.
• Mohan, K., 1958, Miogypsinidae from Western India: Micropaleontology, 4,373-390.