Geologically, Serra de Paranapiacaba is located in the Apiaí - terrain,
in the
southern
Ribeira belt (
Mantiqueira Province).
This ancient fragment of supercontinent Rodinia is composed of sedimentary rocks of the so-called Açungui supergroup, which, during the
Brasiliano - Pan African cycle were intruded by three enormous
Neoproterozoic granites
(
Cunhaporanga,
Três Córregos and
Agudos Grandes).
Of particular interest is the so-called Lajeado subgroup, which is composed of carbonate rocks, particularly limestone.
They were formed about more than one billion years ago by deposition of organic material of microorganisms on the sea floor of a
Precambrian ocean which was closed during the fusion of Rodinia.
The contact of carbonic acid (rainwater enriched by carbon dioxide from the air) with the limestone transformed large areas of the Paranapiacaba mountain range
in a fantastic karst landscape with countless caves, subterranean rivers and abysses. Petar and Intervales are part of the region´s
Speleological Province.
Currently, the
ecotouristic possibilities of Paranapiacaba are limited to the
trails in the proximities of the headquarters of each park.
There is a study about the feasibility of a 240 km long trail (
Trilha do Continuum) which would connect the tree
conservation units.
Unfortunately, the conclusion of this project isn´t easy, among others due to the conflict with armed groups who,
due to the absence of other economic options, continue to explore palm heart (
Euterpe edulis) within the park boundaries.
See also:
guided tours