Results 61 to 70 of about 277 (161)

New detrital petrographic and thermochronologic constraints on the Late Cretaceous–Neogene erosional history of the equatorial margin of Brazil: Implications for the surface evolution of a complex rift margin

Basin Research, Volume 36, Issue 1, January–February 2024.
Since the Late Cretaceous, the equatorial margin of Brazil has undergone a rift phase, with the erosion of a moderate rift escarpment, a Late Cretaceous–Paleogene post‐rift phase, with major drainage reorganization and significant vertical erosion, and a Late Oligocene‐to‐Recent post‐rift phase, with moderate vertical erosion and river headwater ...
Maria Giuditta Fellin, Massimiliano Zattin, Gian Gaspare Zuffa, L. Fernando De Ros, José A. Cupertino, Rogério Schiffer De Souza, J. Marinho Morais Neto, Claudio Dalmonte   +7 more
wiley   +1 more source

First report of pterosaur remains from the Lower Cretaceous Quiricó Formation, São Francisco Basin (Minas Gerais), Brazil [PDF]

Anais da Academia Brasileira de Ciências
The record of pterosaur fossils in Brazil is significant, however, it remains limited to a few sedimentary basins from the Cretaceous period. This study describes an isolated pterosaur tooth assigned to Ornithocheiriformes, collected from the Quiricó ...
FLÁVIA SIBELE F. FIALHO, RODRIGO M. SANTUCCI, MARIANA S. GOMES, DERMEVAL A. DO CARMO   +3 more
doaj   +1 more source

New evidence of feathers in the Crato Formation supporting a reappraisal on the presence of Aves

Anais da Academia Brasileira de Ciências, 2011
The preservation of delicate structures such as feathers is very rare in the paleontological record, due to the fragility of their components. Fossil feathers have been reported from approximately 50 deposits around the world, from the Late Jurassic to ...
Juliana M. Sayão, Antonio A.F. Saraiva, Angelica M.K. Uejima   +2 more
doaj   +1 more source

Reconstructing paleotrophic relationships on the Brazilian Romualdo Formation (Lower Cretaceous) through mercury analysis in fossils

Frontiers in Earth Science
Mercury (Hg) biomagnification values tend to reflect relationships between species in the trophic web, where larger values indicate higher positions in the web.
Lucas Silveira Antonietto, Igor Hamid, Borja Holgado, Borja Holgado, Antonio Leite Rocha, Maria Andréia Ferreira, Antônio Álamo Feitosa Saraiva, Luiz Drude de Lacerda, Rafael Costa da Silva   +8 more
doaj   +1 more source

Composição molecular e origem paleobotânica de âmbares da bacia do Araripe, Formação Santana Molecular composition and paleobotanical origin of ambers from the Araripe basin, Santana Formation

Química Nova, 2009
The terpenoid composition of seven amber samples from Araripe Basin (Santana Formation, Crato Member) has been analyzed by gas chromatography-mass spectrometry to determine their botanical origin.
Ricardo Pereira, Ismar de Souza Carvalho, Antônio Carlos Sequeira Fernandes, Débora de Almeida Azevedo   +3 more
doaj   +1 more source

The Invertebrates of The Romualdo Formation, Araripe Basin: Analysis of Paleoecological and Paleogeographical Data

Anuário do Instituto de Geociências
Fossil invertebrates are good paleoenvironmental indicators due to their sensitivity to abiotic conditions, which contributes to the understanding of the Aptian-Albian of the Araripe Basin. However, much of the paleoecological and paleobiogeographical information on these organisms is scarce in the literature.
Gomes, Bruno de Araújo, Prado, Ludmila Alves Cadeira do, Barreto, Alcina Magnólia Franca   +2 more
openaire   +2 more sources

Aptian archaeoniscid isopod from the Araripe Basin supports Tethyan-linked dispersal into Gondwanan lacustrine systems

Scientific Reports
A new genus and species of fossil isopod, Cicero spectabilis n. gen. n. sp. is described from the Early Cretaceous (Aptian) Nova Olinda Member of the Crato Formation, Araripe Sedimentary Basin, Ceará, northeastern Brazil.
Daniel Lima, Arthur Anker, Sam W. Heads, Allysson P. Pinheiro, William Santana   +4 more
doaj   +1 more source

A new genus and species of enantiornithine bird from the Early Cretaceous of Brazil

Brazilian Journal of Geology
The fossil record of birds in Gondwana is almost restricted to the Late Cretaceous. Herein we describe a new fossil from the Araripe Basin, Cratoavis cearensis nov.
Ismar de Souza Carvalho, Fernando E. Novas, Federico L. Agnolín, Marcelo P. Isasi, Francisco I. Freitas, José A. Andrade   +5 more
doaj   +1 more source

Influence of reactivity and mineralogical composition on instability due to the disintegration of shales from Paraíba and Ceará States, Brazil

Cerâmica
This work aimed to correlate the reactivity and mineralogical composition of shales to their disintegration. To accomplish this, five samples of shale from Rio do Peixe Basin and Araripe Basin, located in the Brazilian States of Paraíba and Ceará ...
C. A. Leal, M. N. C. Brunet, L. V. Amorim, H. L. Lira, F. C. C. Nogueira, W. R. P. Costa   +5 more
doaj   +1 more source

Spectroscopic Analysis of a Theropod Dinosaur (Reptilia, Archosauria) from the Ipubi Formation, Araripe Basin, Northeastern Brazil

Journal of Spectroscopy, 2013
The Araripe Sedimentary Basin is known by the excellence of its fossils, regarding the preservation, diversity, and quantity. Here, we present a spectroscopic analysis using several experimental techniques (X-ray energy dispersion spectroscopy, Fourier ...
João Hermínio da Silva, Francisco Eduardo de Sousa Filho, Antônio Álamo Feitosa Saraiva, Nádia Amanda Andrade, Bartolomeu Cruz Viana, Juliana Manso Sayão, Bruno Tavares de Oliveira Abagaro, Paulo de Tarso Cavalcante Freire, Gilberto Dantas Saraiva   +8 more
doaj   +1 more source