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Cassio Roberto Silva, Serviço Geológico do Brasil - CPRM (Brazil)
Antônio Theodorovicz, Serviço Geológico do Brasil - CPRM (Brazil)
Valter José Marques, Serviço Geológico do Brasil - CPRM (Brazil)
Vitório Orlandi Filho, Serviço Geológico do Brasil - CPRM (Brazil)
Maria Angelica Ramos, Serviço Geológico do Brasil - CPRM (Brazil)
Pedro Augusto Pfaltzgraff, Serviço Geológico do Brasil - CPRM (Brazil)
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This map offers to many segments of the Brazilian society in an understandable translation of the scientific geologic knowledge aiming at its application in the proper use of the country's territory. As the target public for this product is diverse, it was written in a rather universal language, without losing its conceptual precision. This communication challenge is unavoidable to allow the multiple uses needed for the publication.
The Geological Survey reinforces and fills its institutional spaces which provides an inestimable contribution to the planning of the public politics on a sustainable basis. For the first time it is presented to the public a synthesis of the large geosystems which formed the national territory, their limitation and potential, taking into account the lithologic constitution of both geological supra-and infrastructure. The geotechnical character, the soil covering, the migration, accumulation and disposal of the water resources, the vulnerability and capacity to bear all the anthropogenic activities that depends on the geologic factors are also reported. Finally, the availability of the mineral resources that are essential for both economic and social development is treated as Areas with a Relevant Mineral Interest.
The geological contents of the map were reorganized from the Geographic Information System (GIS) of the Geologic Map of Brazil 1:1,000,000 scale and it was both printed and in digital (GIS) forms, to help the project to be inserted into the CPRM's corporative geo-referenced database system (GEOBANK). The rocks were grouped in stratigraphic units different in age but sharing a series of classification criteria, such as: tectonic position, crustal level, rock class (igneous, sedimentary or metamorphic), cohesion degree, texture, composition, deformation levels and types, expressiveness of the rocky body, types of metamorphism, geomorphologic expression and/or special lithotypes. In one hand the use of such criteria was grouped in friable quartzites and sandstones; on the other hand, some sedimentary deposits presenting a very similar composition, structure and texture were separated based on the geometry of their rocky bodies, because it was important to distinguish an extensive deposit from a restricted and rift limited one, for instance.
Twenty-three Geologic-Environmental Domains were described in the map, subdivided into 108 Geologic-Environmental Units. It is a product where the environmental aspects exclusively mean the influence of the geology variations in the suitability and limitation of the terrains face the public works, the agricultural uses, the pollution sources and the groundwater, mineral and tourist potential resources.
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