Asunción arch

24.464476°S 57.327553°W / -24.464476; -57.327553 The Asunción arch (Spanish: Arco de Asunción) is a basement high in Paraguay and nearby areas of Argentina that makes up the modern western boundary of Paraná Basin. Asunción arch is thought to be a forebulge developed as result of the piling up of material in Bolivia and the Argentine Northwest during the Andean orogeny in the Cenozoic Era.^[1]

Along Paraguay Asunción arch has a north–south direction parallel to Paraguay River. To the south of Paraguay Asunción arch runs in a S-SW direction and be traced no further south than to Corrientes Province. A flatter and broader second branch of the Asunción arch runs from southern Paraguay the SE linking up with Río Grande arch in Brazil.^[2]

References

1. Milani, José; Zalán, Pedro Victor (1999). "An outline of the geology and petroleum systems of the Paleozoic interior basins of South America". Episodes. 22 (3): 199–205. doi:10.18814/epiiugs/1999/v22i3/007.
2. Rossello, Eduardo A.; Veroslavsky, Gerardo; de Santa Ana, Héctor; Vicente J., Fúlfaro; Fernández Garrasino, César A. (2006). "La dorsal Asunción - Río Grande: Un altofondo regional entre las cuencas Paraná (Brasil, Paraguay y Uruguay) y Chacoparanense (Argentina)". Revista Brasileira de Geociências (in Spanish). 36 (3): 181–196. doi:10.25249/0375-7536.2006363535549.