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Ver términos de la licenciaBarragán-manzo, Ricardo, et al. (2004). Microfacies analysis and micropaleontological data of the Barremian–Aptian transition in Sierra del Rosario, Durango, Mexico. Revista Mexicana de Ciencias Geológicas; Vol 21 No 2, 2004; 247-259. Recuperado de https://repositorio.unam.mx/contenidos/4122849
Autor(es)
Barragán-manzo, Ricardo; Díaz-otero, Consuelo Díaz-otero
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Microfacies analysis and micropaleontological data of the Barremian–Aptian transition in Sierra del Rosario, Durango, Mexico
Fecha
2018-05-14
Resumen
The detailed analysis of the microfacies succession on a stratigraphic sequence representative of the upper part of the Cupido Formation, cropping out in Durango State, provide additional data for the paleoecological and micropaleontological significance of the Barremian–Aptian transition in northeast Mexico. The stratigraphic section herein studied is composed of a series of deposits typical of a shallow carbonate platform, which was apparently exposed to different paleobathymetric changes of short duration and low magnitude through the Barremian–Aptian transition. The section is characterized by a rich micropaleontological association mainly composed by benthonic foraminifera of the families Ataxophragmiidae, Lituolidae, Textularidae, Orbitolinidae, Nezzazatidae (Subfamily Nezzazatinae) and Miliolidae. These foraminifera are commonly associated to calcareous algae, mollusk and ostracod fragments, pellets, and echinoid spines. The prevailing textural composition and allochemical content throughout the sedimentary facies succession are indicative of Standard Microfacies typical of different sites of deposition, which vary from lagoon or back-reef environments to sand bars or shoals, and into high energy environments in fore-reef positions. The limit of the Barremian–Aptian transition in the area of study is defined by the first stratigraphic appearance of Palorbitolina cf. lenticularis (Blumenbach), and is coincident with an apparent short period of deepening of the deposition environment to a local extent.
Idioma
spa
ISSN
ISSN electrónico: 2007-2902; ISSN impreso: 1026-8774
