Spectroscopic studies of wood fossils from the Crato Formation, Cretaceous Period

Silva, J.H. da; Freire, Paulo; Abagaro, B.T.O.; Silva, J.A.F.; Saraiva, G.D.; Lima, Flaviana Jorge de; Barros, Olga Alcântara; Bantim, Renan Alfredo Machado; Saraiva, Antônio Álamo Feitosa; Viana, Bartolomeu C.

doi:10.1016/j.saa.2013.06.042

Cited by 16 publications

(11 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, the peaks 1331 and 1555 cm -1 (Figure 6) indicate that amorphous carbon is present in the Araripeblatta dornellesae. Amorphous carbon was previously observed in a fossil trunk from the Crato Formation (Silva et al, 2013), reinforcing the hypothesis of remaining carbon content. Baas et al (1995) demonstrated that the aliphatic component encountered in fossil insect tissues is not necessarily the result of migration from an external source.…”

Section: Discussionsupporting

confidence: 78%

“…A saline condition caused by evaporation may also have contributed to reduction of oxygen, because the solubility of O 2 decreases when salinity increases. Such scenario is has suggested an environment of high salinity and high evaporation rates associated with long dry periods (Martill et al, 2007;Heimhofer et al, 2010;Silva et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…The fossils are relatively abundant and diverse, including trace fossils, invertebrates, vertebrates, plants, and palynomorphs (Viana & Neumann, 2000). Due to the exceptionally preserved biota (Davis & Martill, 1999;Fielding et al, 2005;Heads et al, 2005;Menon & Martill, 2007;Silva et al, 2013;Delgado et al, 2014;Barling et al, 2015;Osés et al, 2016Osés et al, , 2017 the Crato Formation is considered a Konservat-Lagerstätte. The Crato Formation represents one of the largest Cretaceous insect deposits in the world, considering both taxonomic diversity and number of individuals (Grimaldi, 1990).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Throwing light on an uncommon preservation of Blattodea from the Crato Formation (Araripe Basin, Cretaceous), Brazil

Bezerra

Silva

Paula³

et al. 2018

Rev. bras. paleontol

View full text Add to dashboard Cite

Fossilization results from several physical-chemical-geological processes. Original labile and non-bioclastic structures rarely survive throughout this process. In particular, the Crato Formation (Araripe Basin) is one of the most significant Cretaceous Konservat-Lagerstätten due to its well-preserved invertebrates, mainly three-dimensional insects. In general, Crato insects exhibit brown-orange color, constituted by goethite or hematite replacements. In this context, we used the scanning electron microscopy coupled to energy dispersive spectrometer and Raman spectroscopy to analyze Araripeblatta dornellesae, a 115 million-years-old fossil from Crato Formation, Araripe Basin. Our results show that a dark-color material rather than the brown-orange pattern preserve this specimen. The carbon is restricted to the fossil imprint, indicating some retention of the original organic remains. In addition, the presence of original organic components allowed to approach the biochemical aspects further than simple morphology, as well as to elucidate the taphonomical complexity involved in this preservation style.

show abstract

Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Throwing light on an uncommon preservation of Blattodea from the Crato Formation (Araripe Basin, Cretaceous), Brazil

Bezerra

Silva

Paula³

et al. 2018

Rev. bras. paleontol

View full text Add to dashboard Cite

show abstract

“…These bands can be assigned as well, respectively as D and G bands corresponding to the amorphous carbon [11]. It is interesting also to note that in a previous study, the bands D and G were observed in the Raman spectrum of a wood fossil collected from the Crato Formation, belonging to the Cretaceous Period, being associated with the amorphous carbon, contained in the sample as well [5]. In the fossil from the "Crato" Formation, the presence of the amorphous carbon and the additional presence of oxygen were interpreted as one possible explanation, being a consequence of the natural fire.…”

Section: Analytical Datamentioning

confidence: 61%

“…The spectroscopic characterization of fossils [4] may contribute to understand the various fossilization mechanisms, conditions and processes that have enabled the preservation of animals and plant remains in the sedimentary Parnaiba Basin. The present study deals with the fossilization processes related to the plants from the Paleozoic Era (Permian Period), through various physico-chemical techniques [5]. Various analyses were performed aiming to determine the chemical and composition in the fossilized logs, therefore, inferring the sequence of chemical events and the main mechanisms of the fossilization process that produced the fossils.…”

mentioning

confidence: 99%

Spectroscopic studies on Permian plant fossils in the Pedra de Fogo Formation from the Parnaíba Basin, Brazil

Conceição

Silva

Cisneros

et al. 2015

Preprint

View full text Add to dashboard Cite

The "Pedra de Fogo" Formation dated from the Permian period (approximately 280 million years ago), belongs to the sedimentary Parnaiba Basin, located in the northeastern region of Brazil. It is recognized by their well preserved fossil contents and it is notable for having several fossilized trunks in the growing position. Specimens from different localities were selected in order to perform spectroscopic studies and X-ray diffraction analysis, as well, for the purpose of identifying and characterizing compounds related to the fossilized materials. These different techniques allowed to obtain information from the molecular spectra in organic and inorganic substances, which are present in these above stated fossils and in the atomic elements, as well as the crystalline phases. These aforementioned studies have revealed promising paleoenvironmental interpretations about their depositional strata. Regarding the techniques, these have enabled inferences with respect to the fossil diagenetic events and allowed a better understanding of the fossilized process and the mineralogical characteristics of the living environment, where the plants were buried. This study presents physical and/or chemical properties of the fossilized plants through vibrational spectroscopies, SEM/EDS spectroscopy and X-ray diffraction techniques. 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.PeerJ PrePrints | https://dx.doi.org/10.7287/peerj.preprints.1547v1 | CC-BY 4.0 Open Access |

show abstract

Fire in the paradise: evidence of repeated palaeo-wildfires from the Araripe Fossil Lagerstätte (Araripe Basin, Aptian-Albian), Northeast Brazil

Lima

Pires

Jasper

et al. 2019

Palaeobio Palaeoenv

View full text Add to dashboard Cite

Spectroscopic studies of wood fossils from the Crato Formation, Cretaceous Period

Cited by 16 publications

References 22 publications

Throwing light on an uncommon preservation of Blattodea from the Crato Formation (Araripe Basin, Cretaceous), Brazil

Throwing light on an uncommon preservation of Blattodea from the Crato Formation (Araripe Basin, Cretaceous), Brazil

Spectroscopic studies on Permian plant fossils in the Pedra de Fogo Formation from the Parnaíba Basin, Brazil

Fire in the paradise: evidence of repeated palaeo-wildfires from the Araripe Fossil Lagerstätte (Araripe Basin, Aptian-Albian), Northeast Brazil

Contact Info

Product

Resources

About