Geology of Paraguay Basin. These tholeiites were erupted in the Early Cretaceous in association with the initial opening of the South Atlantic. The Cretaceous volcanism did also created minor outcrops of potassic alkaline volcanics in a graben structure developed between Asunción and Villarrica and in Amambay Department. Cretaceous volcanism did also left small units of sodic alkaline rocks in Misiones Department in southern Paraguay. Geology of Paraguay The country of Paraguay lies geologically at the borderzone between several cratons. Due to thick Cenozoic sediment cover and regolith development few outcrops are available in Paraguay. East of Paraguay River that Precambrian and Early Paleozoic
Concepción, Paraguay Concepción, Paraguay Concepción () is a city & district in northern Paraguay and capital of the Concepción Department. It lies next to the Paraguay River. Founded by a Spanish Governor, named Agustín Fernado de Pinedo, the town prospered in the early years of the 20th century, as a centre for the north of the country, exploiting the new wealth of the Gran Chaco, and a river port. The town was also a centre for the Paraguayan Civil War of 1947. The city is the seat of the Roman Catholic Diocese of Concepción en Paraguay. Route 5 "Gral. Bernardino Caballero" connects