Geological map adapted from SGP (1992). a Miocene; b Cretaceous; c Ordovician–Silurian; d ''Xisto–Grauváquico'' Complex ; e fault; 1–5 slope number  

Geological map adapted from SGP (1992). a Miocene; b Cretaceous; c Ordovician–Silurian; d ''Xisto–Grauváquico'' Complex ; e fault; 1–5 slope number  

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