Llanquihue glaciation in the context of End moraine

The Southern Patagonian Ice Field (Spanish: Campo de Hielo Patagónico Sur), located at the Southern Patagonic Andes between Chile and Argentina, is the world's second largest contiguous extrapolar ice field. It is the bigger of two remnant parts of the Patagonian Ice Sheet, which covered all of southern Chile during the last glacial period, locally called the Llanquihue glaciation.

The Patagonian Ice Sheet was a large elongated and narrow ice sheet centered in the southern Andes that existed during the Llanquihue glaciation. The ice sheet covered all of Chile south of Puerto Montt plus the western fringes of Argentine Patagonia.

The ice sheet extended beyond the crest of the Andes into Argentina, but because of the dryness of the climate it did not reach beyond present-day lakes such as the Yagagtoo, Musters, and Colhue Huapi. At its peak (about 18,000 to 17,500 years ago), the Patagonian Ice Sheet covered about 480,000 km of land with an estimated ice-volume of more than 500,000 km, of which about 4% remains glaciated today in two separated portions known as the Northern and Southern Patagonian Ice Fields.

General Carrera Lake (Chilean part, officially renamed in 1959) or Lake Buenos Aires (Argentine part) is a deep lake located in Patagonia and shared by Argentina and Chile. Both names are internationally accepted, while the autochthonous name of the lake is Chelenko, which means "stormy waters" in Aonikenk. Another historical name is Coluguape from Mapuche, a derivative of this name is applied to Colhué Huapí Lake after Argentine explorer Francisco Moreno reached this lake in 1876 conflating it with Coluguape (General Carrera Lake).

The lake is of glacial origin and is surrounded by the Andes mountain range. The lake drains to the Pacific Ocean on the west through the Baker River. During the last glaciation the lake drained to the Atlantic through Deseado River.

The Guayaneco Archipelago (Spanish: Archipiélago Guayaneco) is an archipelago in southern Chile. It consists of 2 main islands, Wager Island (to the east), es:Isla Byron (to the west), and many smaller islands.

It was heavily glaciated during the most recent ice age. These glaciers dissected these mountain islands into a series of deep river valleys and glacial troughs. Today these glacial troughs are deep channels and fjords. The islands of the Guayaneco Archipelago comprise a series of elongated islands and deep bays that are the traces of a drowned coastal range. A number of deep channels are traversing generally north to south through the islands. These include the Messier Channel in the lower left portion of the image, and the Fallos Channel near the center of the image. Forests cover the lower slopes of the mountains throughout the many islands. Human settlement on these islands is scarce.