The Ipanema Hill (Morro de Ipanema in Portuguese), "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