Levantamento diferencial evidenciado pelas escadarias de terraços marinhos do Cabo Espichel e do Cabo Raso durante o Plistocénico

Abstract

This study focuses on two marine terrace staircases of central Portugal: Cabo Raso (west of Lisboa) and Cabo Espichel (western Arrábida chain). Four emerse marine terraces were found in the Cabo Raso area, while twelve were found at Cabo Espichel, according to geomorphological and stratigraphical studies. Electron Spin Resonance and luminescence dating were used to establish a chronology for the coastal staircases, from which uplift rates were calculated. The present elevations of the culminating marine abrasion platform represented at Cabo Raso and Cabo Espichel, express the differential uplift between these areas over the last ~3,7 Ma.