The Art of Stonemasonry - Past and Present

General geology of Curitiba Proterozoic Age (1800-2600 Ma). There are migmatites and gneiss which shape the base of almost the whole region; Younger metamorphic rocks Upper Proterozoic Age (570-1000 Ma) with marbles, metacalcareous and dolomites; Upper Proterozoic Age (570-1000 Ma) with granites too; Dykes of diabase related to the time of the separation of continents, South-America-Africa (Mesozoic Age - 65 a 235 Ma); Over these ancient rocks was formed the Sedimetary basin of Curitiba presenting shales, graywackes, siltites and argilites, stored at the end of the Tertiary Age (1,5 Ma)

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