for those who wonder what is the recipe to get rio de janeiro's characteristic rock formations, some of the ingredients include quartzite, quartz rich granitoids, alkali-feldspar granite, siena-granite, monzogranite, granodiorite, tonalite, alkali-feldspar syenite, quartz-alkali-feldspar syenite, syenite, quartz syenite, monzonite, quartz monzonite, monzodiorite, quartz monzogabbro, diorite, foid-gabbro, quartz-diorite and quartz-gabbro, plagioclase gneiss, amphibolite with quartz, and white granite.

on this link a quick and simplified map shows rio de janeiro's mountains and city and gives a good idea of th general landscape.

provided by the instituto brasileiro de geografia e estatística - ibge, this map clearly shows all of rio de janeiro state mountain ridges.