Geology
Sorocaba is located exactly on the limit between the sedimentary rocks of Parana Sedimentary Basin (Itararé Group, in glacial and deltaic environments of Permian-Carboniferous age) and crystalline basement (Neoproterozoic). Important granite massifs are Sorocaba Massif (calc-alkaline I-Type) and São Francisco Massif (Subalkaline A-Type). Metamorphic low grade rocks as phyllites, metacalcareous, metarenites, are marine metassediments included in Sao Roque Group (Neoproterozoic) with structural trend northwest-southwest. The Ipanema Hill or Araçoiaba Ridge is a prominent and isolated topographic elevation, it comprises ultrabasic-alkaline intrusion age(Mesozoic, Early Cretaceous), remnant of ancient volcano. It was the first iron mine, ironworks and metallurgy of Brazil, Ipanema. The ore was exploited from magnetite, probably associated to carbonatite body.
Read more about this topic: Sorocaba