Artículos de revistas
Neopaleozoic striated surfaces in the granitic basement and clast pavement remains of Salto, SP
Fecha
2009Registro en:
Rem: Revista Escola de Minas, v.62, n.1, p.17-22, 2009
0370-4467
Autor
PEREZ-AGUILAR, Annabel
Petri, Setembrino
Hypolito, Rafhael
EZAKI, Sibele
SOUZA, Paulo Alves de
Juliani, Caetano
MONTEIRO, Lena V. S.
MOSCHINI, Francisco A.
Institución
Resumen
Near Guarau Ceramic, localized southwest of Salto city in the State of Sao Paulo, two granite outcrops, distant some tens of meters from each other, display Neopaleozoic striated surfaces. These surfaces are in contact with diamictites from the Itarare Subgroup. The striae correspond to sub parallel grooves with millimetric spacing and depth, oriented about N48E and dipping 12 degrees to 42 degrees towards SE. Observed features and association with diamictites indicate an origin by glacial abrasion due to ice movement from southeast towards northwest. About 1.8 km east of Salto, unconsolidated material containing flat-iron-shaped and striated clasts was found on top of granite outcrops, interpreted as clasts pavement remains.