Análise sedimentológica dos estratos do perfil norte da área de escavação do sítio arqueológico GO-Ja-02, Serranópolis, Goiás

Abstract

The Archaeological Site GO-Ja-02, located in a sandstone shelter, presents a complex stratigraphy evidenced in excavation and during the data collection period, occupied 9 square meters excavated to a depth of 0.65 meters. On north face of the excavation, six strata were identified, and characterized based on density, color, structure, layer contact, granulometry, roundness and sphericity of the matrix. It was used the sieving technique for granulometric analysis and visual charts for round-ing and sphericity. The degree of selection was analyzed based on the distribution of clay, silt and sand fractions. The results attained indicate the predominance of the sand fraction, orbed grains, good sphericity, and medium degree of selection. The features presented implies a greater porosity, futhering the vertical migration of cul-tural vestiges, percolation of rainwater and to support bioturbation, some of the vari-ables can compromise the archaeological record.