Ipanema Hill

The Ipanema Hill, "also known as Araçoiaba Ridge or "Serra de Araçoiaba", is a prominent and isolated topographic elevation in area about 5069 ha, located in the region of Sorocaba, state of São Paulo, Brazil. The word Araçoiaba in the Tupi language means "place where the sun goes down" or "hiding from the sun," since the word Ipanema means "bad water". Ipanema Hill is located in Sorocaba River Watershed, between the left bank tributaries, the rivers Sarapuí and Ipanema, has an altitude of 968 m above the sea level. It is surrounded by the municipalities of Sorocaba, Iperó, Araçoiaba da Serra, and Capela do Alto that are situated an average elevation of 600 m. It is noteworthy, therefore, focus on local and regional geology shows that it is an intrusion of igneous rocks of ultrabasic-alkaline nature of the Mesozoic era, who crossed the sedimentary rocks of the Paraná Basin in an area with typical geomorphology of the Peripheral Depression, Zone of the Middle Tietê river. Today rocks present there are remnants of an ancient volcano, so in the past, Ipanema Hill was a legitimate volcano. The intrusion event half rose Itararé Subgroup sandstones and crystalline basement rocks also. The geomorphological feature of the hill is also called "Horst Dômico de Araçoiaba da Serra." There fenitization process by alkaline rocks of the intrusion and a significant radial dyke system surrounding the intrusion, with a few tens of kilometers long. ()