Tobífera Formation
| Tobífera Formation | |
|---|---|
| Stratigraphic range: Mid-Late Jurassic | |
| Type | Geological formation |
| Sub-units | Basal Clastic Complex |
| Underlies | Zapata, Springhill, Pampa Rincón & Chon Aike Formations |
| Overlies | Tierra del Fuego Igneous and Metamorphic Complex Cordillera Darwin Metamorphic Complex |
| Lithology | |
| Primary | Silicic pyroclastic rocks (including tuff) |
| Other | Black shale, silicic intrusions, conglomerate, sandstone |
| Location | |
| Coordinates | 52°00′S 73°12′W / 52.0°S 73.2°W |
| Region | Santa Cruz Province Magallanes y la Antártica Chilena Region |
| Country | Argentina, Chile |
| Extent | Rocas Verdes Basin Magallanes & Malvinas Basins |
| Type section | |
| Named for | Spanish for "tuffaceous" |
Tobífera Formation (Spanish: Formación Tobífera) is a volcano-sedimentary formation of Middle to Late Jurassic age. The formation is crops out in the Magallanes Region in southern Patagonia and Tierra del Fuego of Chile, the Santa Cruz Province of southern Argentina, and in the subsurface of the Malvinas Basin offshore Argentina and the Falkland Islands.