Following the discovery of silver at Agua Amarga (1811) and Arqueros (1825) the Norte Chico mountains north of La Serena were exhaustively prospected. In 1832 prospector Juan Godoy found a silver outcrop ("reventón") 50 km south of Copiapó in Chañarcillo. The finding attracted thousands of people to the place and generated significant wealth. After the discovery of Chañarcillo, many other ores were discovered near Copiapó well into the 1840s. Copiapó experienced a large demographic and urbanistic growth during the rush. The town became a centre for trade and services of a large mining district. The mining zone slowly grew northwards into the diffuse border with Bolivia. At the end of the silver rush rich miners had diversified their assets into banking, agriculture, trade and commerce all over Chile.