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Morphotectonics of a high plateau on the northwestern flank of the Continental Rift of southeastern Brazil

2002; Elsevier BV; Volume: 43; Issue: 3-4 Linguagem: Inglês

10.1016/s0169-555x(01)00137-4

1872-695X

May Christine Modenesi‐Gauttieri, Silvio Takashi Hiruma, Cláudio Riccomini,

Groundwater and Watershed Analysis

Integration of landform and structural analysis allowed the identification of Late Pleistocene–Holocene pulses of tectonic activity in the Campos do Jordão Plateau with ages and regimes similar to the ones from the continental rift. Fault reactivation along Precambrian shear zones give rise to a series of conspicuous morphotectonic features, determine the formation of stream piracy phenomena, and divide the plateau into smaller blocks. Recognition of these tectonic pulses as well as of their effects in landform development—particularly clear on the Campos de São Francisco at the highest area of the SE edge of the plateau—show that besides the climate-related Quaternary environmental changes significant neotectonic instability should be considered in the geomorphic evolution of the Campos do Jordão Plateau.