Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Naturalis (2) Autor Bogdanova, T.N. (1) Hoedemaeker, P.J. (1) Klein, J. (1) Prozorovsky, V.A. (1) Palavra-chave 38.22 (2) 42.73 (2) Ammonite zones (2) Aptian (1) Barremian (1) Boundary stratotype (1) Correlation (1) Mediterranean area (1) Trans-Caspian area (1) Mais... Tipo do documento Article / Letter to the editor (2) Ano 1999 (2) País Netherlands (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Ammonite stratigraphy of the Valanginian to Barremian for the Mediterranean region Naturalis Klein, J.; Hoedemaeker, P.J.. Since the 2nd Workshop of the Lower Cretaceous Cephalopod Team in Mula, Spain (Hoedemaeker et al., 1993), several ammonite zones and ammonite horizons have been introduced that still have not be inserted in the standard zonation of the Mediterranean area. In the present survey (1) the different results of various independent specialists are compared, (2) an attempt is made to correlate their resulting zonation schemes, and (3) recommendations are given for the use of the newly introduced zones and horizons in the Mediterranean region. Tipo: Article / Letter to the editor Palavras-chave: Ammonite zones; Mediterranean area; 38.22; 42.73. Ano: 1999 URL: http://www.repository.naturalis.nl/record/216198 Substantiation of the Barremian/Aptian boundary Naturalis Bogdanova, T.N.; Prozorovsky, V.A.. This paper focuses on the Barremian/Aptian boundary in the Trans-Caspian area. Results of a stratigraphical study of the uppermost Barremian and the lower Aptian succession in the Trans-Caspian area are presented. The bed-by-bed description of three sections — Keldzhe, Tekedzhik and Utuludzha — is given as well as detailed lithologic columns. Five ammonite zones are known in the studied stratigraphic interval — the Turkmeniceras turkmenicum, Deshayesites tuarkyricus, D. weissi, D. deshayesi, and Dufrenoya furcata zones. These zones are correlated with those of Europe. The Barremian/ Aptian boundary in the Trans-Caspian area should be drawn at the base of the D. tuarkyricus Zone. It corresponds to the layers with the first occurrences of Deshayesites,... Tipo: Article / Letter to the editor Palavras-chave: Trans-Caspian area; Barremian; Aptian; Ammonite zones; Correlation; Boundary stratotype; 38.22; 42.73. Ano: 1999 URL: http://www.repository.naturalis.nl/record/216196 Registros recuperados: 2 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco