DECORRIDO quase meio século entre a identificação do campo de dunas de Xique-Xique no médio vale inferior do São Francisco, o autor retorna ao assunto, em termos de divulgação científica, e alerta para autoridades federais e estaduais brasileiras. Utilizando imagens de satélites recentes sobre a região, identificou-se o ambiente perigoso da derruição progressiva a que o paleocampo de dunas está sujeito: lesões ao norte do frágil conjunto de dunas regionais, ampliação do uso inadequado dos pequenos vales que cruzam o paleodeserto Quaternário (Pleistoceno Superior), trilhos e anastomosadas de bode de irradiação progressiva no dorso das altas dunas fixadas por vegetação rasteira homogênea (psamobioma) e ampliação das margens ocidentais do campo de dunas a partir do piemonte da Serra do Estreito. Há outras lesões em processo que podem invalidar a pretensa revitalização do Rio São Francisco.

ALMOST half century after identifying the Xique-Xique dune field in the lower middle valley of the São Francisco river, the author takes up the subject again, both as scientific disclosure and as a warning for federal and state authorities in Brazil. Using recent satellite images of the region, he identifies the dangerous environment of progressive dilapidation that the paleo dune field is subject to. One already finds lesions on the north side of these fragile regional dunes and extensive improper use of the small valleys that crisscross the Quaternary paleodesert (later Pleistocene). There is also a progressive irradiation of trilhos e anastomosadas de bode on the chine of higher dunes, fixed by homogeneous creeping vegetation (psammous biome) and an enlargement of the western boundary of the dune field (from the piedmont of the Estreito mountain range), not to mention other ongoing lesions, which may confute the alleged revitalization of the São Francisco river.

Face as condições socioeconômicas que aguçam a carência e a pobreza, torna-se necessário e urgente a implantação de projetos para atender a população excluída. Nesse sentido, este artigo expõe um pequeno (para ser imediatamente viável) projeto social baseado em "minivilas olímpicas", para compor clubes e espaços comunitários.

This paper records a few geographic and archeologic observations related with several "sambaquís" found in the lagoon region of Cananéia, in the south coast of the State of S. Paulo. The major part of such shell-mounds were found to be lying directly upon beach or dune sand, their location being, generally, at the margin of a "marigot" (salt-water river). From the observations made at four different "sambaquís" the authors have concluded that these mounds may be considered a most valuable material for the investigation of the region's near past history. It is believed that at the time the "Man-of-the-sambaquí" was living, the planimetric configuration of the Isle of Cananéia and other low parts of the region were considerably different than at the present time. The authors point out that all the former controversies between the "naturalist" and "artificialist" currents have been definitively settled by the work of Guerra (1951, p. 3-18) in which the differences existing between the "sambaquís" and the "wave-built terraces" are demonstrated by this geographer. The lagoon region of Cananéia with its "restingas", canals, etc., is thoroughly analysed and the probable configuration of the lagoon system and marine canals during the prehistoric period is examined. After a few speculative considerations about the prehistory of the region and after studying the stratification of the "sambaquís" layers together with the heterogenous materials which are included in them the authors present their hypothesis that the building of these mounds was probably connected with magic ritual practices.