The map depicts the different kinds of rocks emerging on South America's surface. Each kind of rock is represented by a conventional colour, referring to the geological period. It also shows the eruptive and inactive volcanoes and the different kinds of eruptive rocks. The map is mostly derived from E. Deckert's one, based on the surveys of Steinmann, Brackebusch, Stübel, Sapper ecc. The map is one of the tables made by the TCI Cartographic Office for the Italian Encyclopedia of Giovanni Treccani Institute
<bdi><a href="https://www.wikidata.org/wiki/Q3779193" class="extiw" title="d:Q3779193"><span title="Italian geologist and paleontologist">Guido Bonarelli</span></a>
</bdi>
CC BY-SA 4.0
<bdi><a href="https://en.wikipedia.org/wiki/en:Touring_Club_Italiano" class="extiw" title="w:en:Touring Club Italiano"><span title="large publisher">Touring Club Italiano</span></a>
</bdi>