990 and 1100 Ma Grenvillian tectonothermal events in the northern Oaxacan Complex, southern Mexico: roots of an orogen

Laurentia-Baltica-Amazonia relations during Rodinia assembly

“…2). It is preserved in a series of basement inliers within the northern Andes of South America (e.g., Ramos, 2010, and references therein) as well as in the Oaxaquia terrane of Mexico, which has been placed between Baltica and Amazonia in the Rodinian reconstructions ( Oaxaquia terrane of Mexico, which would be accreted to northern Amazonia at that time (Solari et al, 2003). This event has been linked to collision between northern Amazonia and Baltica (Cardona et al, 2010;Ibanez-Mejia et al, 2011;Keppie et al, 2001;Keppie et al, 2004;Weber et al, 2010).…”

Braquiópodos discínidos (Lingulida, Discinoidea) de la Formación Ixtaltepec, Carbonífero del área de Santiago Ixtaltepec, Oaxaca

“…Pantoja-Alor, 1970; QuirozBarroso y Perrilliat, 1997Perrilliat, , 1998Navarro-Santillán et al, 2002;Villanueva-Olea et al, 2011;TorresMartínez y Sour-Tovar, 2012, 2016 se caracteriza por la presencia de rocas sedimentarias del Paleozoico que sobreyacen discordantemente sobre las rocas metamórficas neoproterozoicas del Complejo Oaxaqueño (Solari et al, 2003). Las rocas paleozoicas se han agrupado en la Formación Tiñú, del Cámbrico-Ordovícico (PantojaAlor, 1970;Sour-Tovar y Buitrón, 1987), la formación Santiago, unidad informal del Misisípico Temprano Figura 1.…”

Carboniferous brachiopods (Productida and Orthotetida) from Santiago Ixtaltepec, Oaxaca, Southern Mexico

“…Paleozoic sedimentary rocks overly the Oaxacan Complex (Figure 2), composed of Proterozoic pegmatites, schists, paragneiss, and orthogneiss, with ages ranging from 900 to 1100 million years (Fries et al, 1962;Solari et al, 2003). The earliest sedimentary Paleozoic unit is the Tiñú Formation, composed of limestone and shale strata.…”