ИСТИНА

• Даты проведения: 2013
• Описание конференции:

  Now radiolarians and foraminiferas from the Crimean- Cretaceous sequences began to be used actively in regional stratigraphy of the central areas of Russia [1, 3, 7] alongside with others fossils. The radiolarians and foraminiferas are numerous in all sections of the Crimean- Caucasian area and are widespread practically everywhere. However, despite of large number, radiolarians and foraminiferas complexes of the Upper Cretaceous of the the Caucasian area, as well as one-age radiolarian associations of Russian plate [6], are studied insufficiently. As moderate to subtropical structure of radiolarian and foraminifera associations essentially differ from associations of tropical areas of the World ocean which were a basis of present unique in detail the developed zonal scale on radiolarians and foraminiferas [5] creation of Crimean- Cretaceous zonal scale on Crimean- Cretaceous strongly is required. For the Crimean- Caucasian area the least developed interval there is a terminal part top of Campanian and Maastrichtian. At the moment the Campanian radiolarian zone Amphipyndax tylotus - Dictyomitra torquata and Upper Santonian radiolarian zone Euchitonia santonica-Archaeospongoprunum nishiyamae are allocated based on range of index species. The Turonian radiolarian zone Alievium superbum, Coniacian radiolarian zone Alievium praegallowayi - Pseudoaulophacus praefloresensis and Lower Santonian radiolarian zone Alievium gallowayi - Pseudoaulophacus floresensis proposed based on evolutionary line of spine from triangular to circle within Genus Alievium. Cenomanian radiolarian zone Holocryptocanium barbui - Pseudodictyomitra pseudomacrocephala is represented by acme of index species. On the future especially perspective for objectives Crimean Mountains and Great Caucasus are represented. Planktonic foraminifera scheme consists of 14 zones and 2 subzones with several infrazonal bioevents. Phylogeny of Thalmanninella, Rotalipora, Marginotruncana, Sigalitruncana, Dicarinella, Globotruncana, Concavatotruncana, Contusotruncana, Globotruncanita и Abathomphalus were used for zones, subzones and bio-events characteristics (system mainly of Loeblich&Tappan. 1988). In the present study we show that several species of planktonic foraminifers appear sooner than previously thought for Crimea-Caucasus area [ ]. However, some species appear later than in other regions of the Mediterranean area, for example Tunisia, Spain, Southern France and Mexico Work is executed at support of fund of the Russian Federal Property Fund (the project 12-05-00690, 12-05-00263, 13-05-00447).

• Добавил в систему: Копаевич Людмила Федоровна

Доклады:

• 2013 Radiolarian and foraminiferal Upper Cretaceous zonal divisions of the Crimean-Caucasian region. First International
• Авторы: Radiolarian and foraminiferal Upper Cretaceous zonal divisions Kopaevich L.F, Vishnevskaya V.S.