The Asunción arch ( es, Arco de Asunción) is a

basement high WealdBasinCrossSection

In geology, a basement high is a portion ...

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 , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

and the Argentine Northwest during the Andean orogeny in the Cenozoic Era. 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.

References

{{reflist Basement highs Geology of Argentina Geology of Paraguay Paraná Basin