Disaster of the model of Fox Mountain range of the Sun in Mato Grosso of the South In what it refers to the process of aboriginal land landmark, has two basic modalities to accomplish such procedure. In accordance with the especificidades of the indians, identified for the antropolgicos studies, the Public Power can demarcate continuous, global areas; as well as it can demarcate broken up areas, in ‘ ‘ ilhas’ ‘ , always taking in consideration the basic resources for the preservation of the culture of the aboriginal peoples. In the case of landmark of the reserve Fox Mountain range of the Sun, the antropolgicos studies had identified that it had the lack for the constitution of aboriginal reserve in continuous areas, a time that the indians of that region presented nomadic habits, as well as had a pacific convivncia, needing, in this meantime, of free-transit for circulation of a place for another one, and of satiated areas to keep its collecting habits and of extensive culture. No longer that if it relates to the Mato Grosso of the South, a process of landmark in continuous areas would represent a disaster in virtue of the especificidades of the aboriginals of this region. The sulmatogrossenses etnias present heterogeneous habits completely, historically, had always kept ferrenhos conflicts between itself. Thus being, a process of delimitation of aboriginal areas of global form would incite disputes between indians of different groups. Ademais has that to take in account the fact of that, in the case of Mato Grosso of the South, a process of territorial landmark of global matrix would enclose urban areas of some sulmatogrossenses cities, what it would provoke population displacements, unemployment and too much decurrent economic damages of these events. Therefore, in Mato Grosso of the South, they are necessary, for the elucidated characteristics already, prompt studies that they aim at to the delimitation of specific and broken up areas of aboriginal domain.