Abstract
The Pedra de Fogo Formation dated from the early Permian (approximately
280 Mya), belongs to the sedimentary Parnaiba Basin, located in the
northeastern region of Brazil. It is recognized by their well preserved
plant fossil contents and it is notable for having several fossilized
trunks in the life position. This study presents physical and/or
chemical properties of the fossilized plants through vibrational
spectroscopies, SEM/EDS spectroscopy and X-ray diffraction techniques.
Specimens from different localities were selected for the purpose of
identifying and characterizing compounds related to the fossilized
materials. These different techniques allowed obtaining information from
the molecular spectra in organic and inorganic substances, which are
present in these stated fossils and in the atomic elements, as well as
the crystalline phases. Based on the results duly obtained, we were able
to identify the presence of silica and confirm that the dominant process
of the fossilized specimens investigated has occurred through quartz
silicification with the contribution of persistence from amorphous
carbon. (C) 2018 The Authors. Production and hosting by Elsevier B.V. on
behalf of King Saud University.
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