North Patagonian Batholith North Patagonian Batholith The North Patagonian Batholith () is a series of igneous plutons in the Patagonian Andes of Argentina and Chile. The Northern Patagonian Batholith was formed in the Mesozoic Era and Cenozoic Era. It is made up of a collection of individual plutons made up of granodiorite, tonalite and diorite among other rocks. Most plutons of the North Patagonian Batholith are of Cretaceous Period to the Miocene age of the Neogene Period (135 Ma to 25-15 Ma), during the Mesozoic Era. Late Miocene to early Pliocene (10 to 5 Ma) leucogranites were also intruded. The Tertiary intrusions are
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