New data on the Lower Jurassic ammonites of the Bodrak River Basin (Southwestern Crimea)
Abstract
Lower Jurassic ammonites Dactylioceras (Orthodactylites) semicelatum (Simpson), Dactylioceras (Dactylioceras) ex gr. commune (Sowerby), Arnioceras ex gr. ceratitoides (Quenstedt), Angulaticeras (Boucaulticeras) dumortieri (Fucini), Angulaticeras sp. and Eleganticeras (?) sp. from the zone of tectonic melange (“Eskiordinsky series”) and flysch of the Tauriс series of the Bodrak River Basin were described. The first three species have been identified in this area for the first time. Representatives of the Angulaticeras and Arnioceras genera are typical of the Sinemurian stage, the Dactylioceras and Eleganticeras (?) genera for the lower substage of the Toarcian stage. Some of the described ammonite species correspond to the zones established in Western Europe: A. (B.) dumortieri to the Lower Sinemurian Oxynotum zone, D. (O.) semicelatum to the Lower Toarcian Tenuicostatum zone. In addition, the D. (D.) ex gr. commune suggests the correlation with the Lower Toarcian of the Northeast of Russia, Northern Alaska, Arctic Canada, Spitsbergen
archipelago and South America.
About the Authors
B. A. Zaitsev
A. P. Karpinsky Russian Geological Research Institute (VSEGEI)
Russian Federation
Russian Federation
Ph. D. Student
V. V. Arkad’ev
Institute of Earth Sciences of St. Petersburg University (Institute of Earth Sciences of SPbGU)
Russian Federation
Russian Federation
Doctor of Geological and Mineralogical Sciences, Professor
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Review
For citations:
Zaitsev B.A., Arkad’ev V.V. New data on the Lower Jurassic ammonites of the Bodrak River Basin (Southwestern Crimea). Regional Geology and Metallogeny. 2019;(78):21–30. (In Russ.)
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