Discovery of radiolaria and conodonts in the Carboniferous–Permian of San Salvador Patlanoaya (Puebla, Mexico); biostratigraphic implications

Depositional environment and biofacies characterization of the Upper Pennsylvanian–Lower Permian deposits of the San Salvador Patlanoaya section (Puebla, Mexico)

“…These members have been interpreted as a succession of transgressive-regressive cycles (Brunner 1987;Villaseaeor et al 1987;Vachard et al 2000a;Vachard and Flores de Dios 2002). In the study area, there is little evidence of regional tectonics (Alva-Valdivia et al 2002), and the Ouachitan orogeny (Ross 1979(Ross , 1986Malone et al 2002) left no distinct marks in the Patlanoaya succession (Caridroit et al 2002). Nevertheless, this interpretation remains controversial since there are some granitoid intrusions, such as Totoltepec or Palo Liso, which have been dated as Lower Permian (Keppie et al 2003).…”

“…The interpretation of the fossiliferous San Salvador Patlanoaya section has undergone numerous revisions (Vazquez-Echeverría 1986;Brunner 1987;Villaseaeor et al 1987;Brunner et al 1988;Buitrón 1991, 1992;coworkers 1991, 2000;Esquivel-Macías 1996;Flores de Dios et al 1998;Vachard et al 2000a;EsquivelMacías et al 2000;Caridroit et al 2002;Vachard and Flores de Dios 2002). A reevaluation of the biostratigraphy has been provided, and several biozones have been proposed, based on various marker groups: brachiopods, fusulinids, crinoids, conodonts, radiolarians, and rare ammonoids (Fig.…”

“…2), is probably a condensed sequence, Mississippian to Middle Pennsylvanian in age, characterized by the radiolarian Latentifistula ex gr. impella (Ormiston and Lane) sensu Caridroit (Caridroit 2000), and containing numerous representatives of the orders Latentifistularia and Entactinaria, but no Albaillellaria (Caridroit et al 2002).…”

“…The fish remains were identified as Moreyella typicalis Gunnell (Derycke-Khatir et al in press). Member E, corresponding to green shales, pink sandstones, and gravelly conglomerates, belongs to the Upper Virgilian to Orenburgian by superimposition (Caridroit et al 2002).…”

“…While many previous studies have focussed on biostratigraphy and lithostratigraphy (Brunner 1987;Villaseaeor et al 1987;Vachard et al 2000a;Caridroit et al 2002;Vachard and Flores de Dios 2002;DeryckeKhatir et al in press) only a few detailed investigations on sedimentological, palaeoecological and taphonomic aspects of the fauna have been attempted (Flores de Dios et al 1998;Derycke-Khatir et al in press). In this paper a sedimentological and palaeontological approach is used (1) to understand the relationship between the palaeoenvironmental parameters (i.e.…”