Feixes de Restinga da Ilha de Santa Catarina, Brasil

Abstract

Beach ridge sands from the northern beaches of Santa Catarina Island (Florianópolis), Brazil, are studied by considering their textural and mineralogical properties. Grain size analysis shows that sedimenst are fine sands (Mz = 2,500-2,266), very well sorted (=0,343-0,258) and both positive (Jurerê beach), and negative (Canasvieiras beach) skewed. Sphericity and roundness indices, and the prevailing surface texture reveal that the samples are on the mature to supermature development stage (FOLK, 1951)⁵ . Primary structures are represented by laminar bedding dipping 3-4º seaward and cut-and-fill cross-bedding.