Patagonian Ice Sheet Ice Sheet resulted in a dramatic release of freshwater to the adjacent ocean, decreasing its salinity and altering its circulation, resulting in significant ecological changes both locally and remotely. Patagonian Ice Sheet 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
Conquest of the Desert the cities of General Alvear, Veinticinco de Mayo and Nueve de Julio. They killed 300 settlers and drove off 200,000 head of cattle. These events were a catalyst for the government to mount the Conquest of the Desert. The Indians drove the stolen cattle from the incursions ("malones") to Chile through the Rastrillada de los chilenos and traded them for goods. The historian George V. Rauch notes evidence that Chilean authorities knew about the origin of the cattle and consented to the trading in order to strengthen their influence over Patagonian territories. They expected eventually to occupy those lands in