For ten points, identify this elevated plateau, a region that encompasses most of southern Argentina.
The name of this region comes from the purported resemblance of the Tehuelche people to a dog-headed monster from the romance Amadís of Gaul. South of Lake Nahuel Huapi, all the lakes of this region except two drain into the Pacific through canyons, while its oil fields around Comodoro Rivadavia contain most of its country's reserves of oil and natural gas. Its characteristic steppe-like plains become more irregular south of the Rio Negro, and it is bounded to the south by the Strait of Magellan, to the north by the Colorado River, and to the west by its namesake Andes. For ten points, identify this elevated plateau, a region that encompasses most of southern Argentina.
The name of this region comes from the purported resemblance of the Tehuelche people to a dog-headed monster from the romance Amadís of Gaul.
{Patagonia}