Abstract
An insufficiently known bivalve and gastropod assemblage from the Early-Middle Miocene (Tarkhanian-Chokrakian) of northern Sinop Province (Turkey), is analyzed. Environments of the assemblage are reconstructed for the Chokrakian as subtidal, with prevailing lime and sandy bottom and good aeration, and partially well vegetated. Impoverishment of the mollusk biocoenose in this part of the marine basin (only 18 bivalve and 22 gastropod species recorded) compared to other areas, including the closest regions, Bulgaria on the west and Georgia on the east, is emphasized. The relatively low diversity of the fauna is probably connected not only with insufficient collecting, but with special hydrological conditions. A special aspect of the fauna is highlighted by the presence of the bivalve Circomphalus foliaceolamellosus subplicatus (Orb.), which is rare in the Chokrakian.
Similar content being viewed by others
References
Goncharova, I.A., Bivalves from the Tarkhanian and Chokrakian basins, Tr. Paleontol. Inst. Akad. Nauk SSSR, 1989, vol. 234, pp. 1–200.
Goncharova, I.A., Shcherba, I.G, and Khondkarian, S.O., Tarkhanian-Khondrian stage in the development of the Euxine-Caspian Basin (Eastern Paratethys): Part 2, Stratigr. Geol. Korrelyatsiya, 2002, vol. 10, no. 2, pp. 100–112.
Goncharova, I.A., Shcherba, I.G., and Khondkarian, S.O., Map 5. Early Middle Miocene (Langian. Early Badenian. Chokrakian). 16–15 Ma. Lithological-paleogeographic maps of Paratethys. S. 19–21 (10 maps. Late Eocene to Pliocene), Cour. Forschungsinst. Senckenb., 2004, no. 250, pp. 1–46.
Iljina, L.B., New marine gastropods from the Tarkhan-Konka of Eastern Paratethys, Paleontol. J., 1994, vol. 28, no. 1A, pp. 27–42.
Iljina, L.B., Key to marine Middle Miocene gastropods of southwestern Eurasia, Tr. Paleontol. Inst. Ross. Akad. Nauk, 1993, vol. 255, pp. 1–151.
Ivanova, E.V., Pteropods as an indicator of paleoenvironment, Okeanologiya, 1983, vol. 23, no. 5, pp. 839–845.
Nevesskaja, L.A., Goncharova, I.A., Paramonova, N.P., et al., Key to Miocene bivalves of southwestern Eurasia, Tr. Paleontol. Inst. Ross. Akad. Nauk, 1993, vol. 247, pp. 1–412.
Nevesskaja, L.A., Goncharova, I.A., and Iljina, L.B., Types of Neogene marine and nonmarine basins exemplified by the Eastern Paratethys, Paleontol. Zh., 2005, no. 3, pp. 3–12.
Nikolov, P.I., Marine mollusk fauna from the Karapelit, Galaskat, and Euxinograd formations (Neogene, Middle Miocene), Doctoral Dissertation, Bulgaria, Sofia, 2001.
Özsayar, J., Karadeniz kiyi bölgesindeki neojen formasyonlari ve neojoen formasyonilari ve bunlarin mollusk faunasinin incelenmesi, Karadeniz Teknik Univ. Yayin, 1977, no. 79. pp. 1–79.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © I.A. Goncharova, L.B. Iljina, A.L. Tchepalyga, 2014, published in Paleontologicheskii Zhurnal, 2014, No. 3, pp. 35–39.
Rights and permissions
About this article
Cite this article
Goncharova, I.A., Iljina, L.B. & Tchepalyga, A.L. New data on mollusks from the Miocene (Tarkhanian-Chokrakian) of northern Sinop Province, Turkey. Paleontol. J. 48, 249–254 (2014). https://doi.org/10.1134/S003103011403006X
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S003103011403006X