Coastal platforms result from successive episodes of marine modeling and tectonic uplift. When the sea level remains in the same relative position in relation to a rocky mass, the intense activity of the waves creates a planar surface as a result of this wear and chemical change. Its preservation is possible due to the drop in sea level, which frees it from the mechanical force of the waves and the seismic activity that normally causes its lifting. The Montedor hill corresponds to a granitic mass, which preserves the staggering landscape resulting from the modeling of coastal platforms I, II, III and IV (Carvalhido, 2012).

References:

Carvalhido (2012). O Litoral Norte de Portugal (Minho-Neiva): evolução paleoambiental quaternária e proposta de conservação do património geomorfológico. Tese de Doutoramento, Universidade do Minho, 564 p.