Ucayali Peneplain

The Ucayali Peneplain is a large near-flat erosion surface, a peneplain, located in the Amazon basin. The Ucayali Peneplain is largely buried by sediments forming an unconformity. Its origin has been dated to the Miocene epoch. The Peneplain was first described in 1948 in the Contamana region of Peru.^[1]

References

↑ Campbell Jr., Kenneth E.; Frailey, Carl David; Romero-Pittman, Lidia (2006). "The Pan-Amazonian Ucayali Peneplain, late Neogene sedimentation in Amazonia, and the birth of the modern Amazon River system". Palaeogeography, Palaeoclimatology, Palaeoecology 239: 166–219. |access-date= requires |url= (help)

Major South American geological features

Plates	Antarctic Plate Caribbean Plate Cocos Plate Nazca Plate Scotia Plate South American Plate

Cratons and shields	Amazonian Craton Arequipa-Antofalla Craton Atlantic Shield Central Brazilian Shield Guiana Shield Paranapanema Block Río Apa Craton Río de la Plata Craton São Francisco Craton Uruguayan Shield

Faults and shear zones	Atacama Fault Boconó Fault Cochabamba Fault Zone Cordillera Blanca Fault Zone Dolores-Guayaquil Megashear Domeyko Fault El Pilar Fault System El Tigre Fault Liquiñe-Ofqui Fault Zone Magallanes-Fagnano Fault Morón Fault System Oca-Ancón Fault System Pernambuco Fault San Ramón Fault Sarandí del Yí Shear Zone Sierra Ballena Shear Zone Sobral Fault Trans Brazilian Lineament

Rifts and grabens	Aguapeí Aulacogen Amazon Rift Asunción Rift Cuyo Rift Espino Graben Neuquén Rifts Paramirim Aulacogen Salta Rifts

Sedimentary basins	Altiplano Basin Amazon Basin Andean foreland basins Central Brazil Basin Colorado Basin Cuyo Basin Eastern Venezuela Basin Golfo San Jorge Basin Magallanes Basin Malvinas Basin Neuquén Basin Pantanal Basin Paraíba Basin Paraná Basin Salta Basin Solimões Basin

Orogens	Andean Orogen Brasiliano Orogens Cariri Velhos Belt Famatinian Orogen Gondwanide Orogen Juruá Orogen Pampean Orogen San Rafael Orogen Sunsás Orogen Terra Australis Orogen Tilcarian Orogen

Volcanoes and hotspots	Andean Volcanic Belt Ascension hotspot Caribbean large igneous province Central Atlantic magmatic province Fernando hotspot Galápagos hotspot Juan Fernández hotspot Paraná and Etendeka traps San Felix hotspot Trindade hotspot

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