In 2004, the neighbors of San Carlos began to meet worried about the recent activity of prospecting and mining exploration in the vicinity of the Diamond Laguna Reserve. Some of these neighbors had already done since 2003, accompaniment tasks to the country's geologists, and at that time they did not perceive the activity as a risky. Subsequently, via trips south of local mountains arrive news of what happened in Esquel, and the possibility of having near the springs of water a megaminero project took other connotations.

The neighbors began to meet before the need to learn, and formed the diamond front at first. They began to make informative meetings, and resolved to ask for official information. For this, the neighbors resorted to the mayor, who, as they manifest, did not hear them. The same happened with councilors. Before the official refusal of providing information, the need for the mobilized neighbors of informing their peers was reinforced. They began to give talks in schools, and teachers and families played a very important role in the disclosure of the subject. Thus, the autoconvocate neighbors of San Carlos would arise, which were transformed into the first organization that resisted the megaminery in Mendoza, and at the birth of an important provincial movement.