SciELO - Scientific Electronic Library Online

 
vol.22 issue2Review of Gomphotheriidae in the late Cenozoic of MexicoStratigraphy and microfacies of the southern part of La Boca canyon, Santiago, Nuevo León, Mexico author indexsubject indexsearch form
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • Have no similar articlesSimilars in SciELO

Share


Revista mexicana de ciencias geológicas

On-line version ISSN 2007-2902Print version ISSN 1026-8774

Abstract

BERALDI-CAMPESI, Hugo  and  CEVALLOS-FERRIZ, Sergio R. S.. Microfossil diversity in the Tarahumara Formation, Sonora. Rev. mex. cienc. geol [online]. 2005, vol.22, n.2, pp.261-271. ISSN 2007-2902.

A great diversity of permineralized microfossils are found embedded in chert associated to stromatolites that crop out in the Huépac locality, an Upper Cretaceous (Turonian-Maastrichtian) volcano-sedimentary sequence of the Tarahumara Formation, in Sonora, Mexico. The diversity is represented by fossils of microalgae, pollen, spores, conidiospores, fragments of plants and arthropods, achritarchs and undefi ned structures of biological origin, refl ecting the type of organisms that lived asssociated to the water body and part of the surrounding biota. Our observations support the interpretation of a lacustrine depositional environment associated to magmatism in this portion of the Formation. This work documents part of the Upper Cretaceous microfl ora and microfauna of the northwestern Mexico.

Keywords : microfossils; stromatolites; Tarahumara Formation; Cretaceous; Huépac; Sonora; Mexico.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )