Evolución paleoambiental de la transición glacial-postglacial en la Formación Agua Colorada (Grupo Paganzo), Carbonífero, Sierra de Narváez, NO argentino

Stratigraphy and palynology of a late Paleozoic glacial paleovalley in the Andean Precordillera, Argentina

“…Upper Mississippian and Lower Pennsylvanian glacial and glacial influenced diamictites have been widely recognized in the Andean late Paleozoic basins from Argentina and Bolivia (González, 1981;Limarino and Gutiérrez, 1990;López Gamundí, 1997;López Gamundí et al, 1992;Limarino et al, 2002;González Bonorino, 1992;López Gamundí and Martínez, 2000;Perez Loinaze et al, 2010a,b, among others). Although the major part of the glacial deposits correspond to proximal and distal glaciomarine accumulations (López Gamundí, 1987Gamundí, , 1997Perez Loinaze et al, 2010a), several papers have demonstrated the existence of coarse-grained successions sedimented in glacial paleovalleys interpreted as fjords (Milana and Bercowski, 1990;Kneller et al, 2004;Dykstra et al, 2006Dykstra et al, , 2007Limarino et al, 2010).…”

“…2). The older one, probably Visean in age, seems to have a more restricted regional distribution while the younger, Serpukhovian-early Bashkirian, is widely recorded in the Andean Basins (González, 1981;López Gamundí, 1984, 1997Limarino and Gutiérrez, 1990;López Gamundí et al, 1992;Kneller et al, 2004;Dykstra et al, 2006Dykstra et al, , 2007Limarino et al, 2010).…”

New Record of the Lueckisporites/Weylandites Biozone (Permian) in the Paganzo Basin, Argentina: Stratigraphic Significance

“…In the studied area, late Paleozoic rocks included in the Paganzo Group (Bodenbender, 1911;Azcuy and Morelli, 1970;Azcuy et al, 1979) rest on Cambrian-Ordovician granites, volcanic and metasedimentary rocks. The Carboniferous glacial and postglacial deposits in the Sierra de Narváez are represented by the Agua Colorada Formation (Turner, 1960;Limarino et al, 2010;Césari et al, 2019), which records the late Paleozoic glacial event in the western Gondwana margin. The overlying red beds of the De La Cuesta Formation yielded a U/Pb CA-TIMS age of 312 Ma at its base (Fig.…”

Paleoenvironment and paleontology of the Andapaico Formation (upper Paleozoic, central Precordillera, Argentina)

“…Esta edad se ve reforzada a partir de la ausencia de litologías generadas por la Glaciación Gondwánica (muy común para la base de las unidades neopaleozoicas de la Precor- dillera; Martínez, 1998;Marenssi et al, 2005) y de los carbones tupenses; ambos eventos típicos del Pennsylvaniano de la Cuenca Paganzo (Formación Guandacol-Tupe y equivalentes; Limarino et al, 2002Limarino et al, , 2010. La interpretación de los paleoambientes sedimentarios identificados en la Formación Andapaico (Fig.…”