Magallanes Basin

Aysén Basin The northwesternmost reaches of the basin form a sub-basin known as Aysén Basin or Río Mayo Embayment. From top to bottom the fill the basin is: • Río Frías Formation (Friasian) • Río Baguales Formation (Deseadan) • Late Cretaceous volcanic rock • Divisadero Group (Aptian to Albian) • Coihaique Group (Late Jurassic to Aptian) • Apeleg Formation • Katterfeld Formation • Toqui Formation (Tithonian) • Ibáñez Formation Northwestern basin In the Argentinian parts of the basin, the following formations have been registered from north to south: • Santa Cruz Formation (Santacrucian) • Cerro Boleadoras Formation (Santacrucian) • Río Jeinemeni Formation (Colhuehuapian) • Monte León Formation (Deseadan to Colhuehuapian) • San Julián Formation (Late Eocene to Early Miocene) • Campo Bola Formation • Asunción Formation • Cardiel Formation (Maastrichtian) • Mata Amarilla Formation (Albian to Santonian) • Piedra Clavada Formation (Albian) • Kachaike Formation (Aptian to Cenomanian) • Río Tarde Formation • Apeleg Formation • Cerro Toro Formation (Turonian) • Divisadero Group (Aptian to Albian) • Río Belgrano Formation (Barremian to Aptian) • Springhill Formation (Valanginian to Hauterivian) • El Tranquilo Group (Late Triassic) • Laguna Colorada Formation (Norian) South-central basin • La Ensenada Formation (Ensenadan) • Cordillera Chica Formation • Pinturas Formation (Santacrucian) • Santa Cruz Formation (Santacrucian) • Centinela Formation (Middle Eocene) • Río Leona Formation • Río Guillero Formation • Man Aike Formation (Middle Eocene) • Río Turbio Formation (Early to Late Eocene) • Calafate Formation • Cerro Dorotea Formation • Chorrillo Formation (Maastrichtian) • La Irene Formation (Maastrichtian) • Monte Chico Formation (Maastrichtian) • Cerro Fortaleza Formation (Cenomanian) • Anita Formation • Cerro Cazador Formation (Campanian to Maastrichtian) • Alta Vista Formation (Early to Middle Campanian) • Lago Sofía Formation • Cerro Toro Formation (Turonian to Santonian) • Río Mayer Formation (early Hauterivian to early Albian) • Zapata Formation (Berriasian to Hauterivian) • Springhill Formation (Berriasian to Barremian) • Tobífera Formation (Late Jurassic) Tierra del Fuego • Irigoyen Formation • Punta Basílica Formation • Castillo Formation • Loreto Formation (Priabonian - Divisaderan to Tinguirirican) • Cabo Peña Formation • Tchat Chii Formation • Cerro Colorado Formation • Leticia Formation (Bartonian) • Punta Torcida Formation • Arroyo Candelaria Formation • Río Claro Formation • Policarpo Formation • Bahía Thetis Formation • Cabeza de León Formation • Arroyo Alfa Formation • Yahgan Formation • Beauvoir Formation (Albian) • Nueva Argentina Formation • Lemaire Formation • Pampa Rincón Formation (Barremian to Aptian) • Chon Aike Formation (Middle Jurassic to Berriasian) == See also ==