Results 81 to 90 of about 2,368 (213)

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

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

Positive allometry and the prehistory of sexual selection [PDF]

, 2010
The function of the exaggerated structures that adorn many fossil vertebrates remains largely unresolved. One recurrent hypothesis is that these elaborated traits had a role in thermoregulation. This orthodoxy persists despite the observation that traits
Humphries, Stuart, LeBas, Natasha R., Martill, David M., Tomkins, Joseph L., Witton, Mark P.   +4 more
core   +1 more source

Fossil mollusks from the Crato Formation, Araripe Basin, Brazil

Este depósito contém a evidência primária de ocorrência de moluscos fósseis da Formação Crato (Aptiano, Cretáceo Inferior), localizada na Bacia do Araripe, nordeste do Brasil. O material inclui informações taxonômicas, morfométricas e contextuais referentes a gastrópodes e bivalves provenientes de três associações fossilíferas identificadas nas minas ...
Iara, Iara Ferreira de Lima, Albuquerque Pereira, Priscilla, Prado, Ludmila Alves Cadeira do   +2 more
openaire   +1 more source

Taxonomic remarks on Brazilian Cretaceous Decapoda from Araripe Basin, Brazil, and ecological inferences

Gaea - Journal of Geoscience, 2009
Beurlenia araripensis Martins-Neto and Mezzalira, 1991 (Decapoda: Caridea) and Paleomattea deliciosa Maisey and Carvalho, 1995 (Decapoda: Penaeoidea) are reviser baseated upon new and better preserved samples. The new specimens were found in the Santana Formation, Araripe Basin, Northeast Brazil, respectively in the Crato and Romualdo members.
Antônio Saraiva, Bruno Pralon, Rafael Gregati   +2 more
openaire   +1 more source

First turtle from the Ipubi Formation (Early Cretaceous), Santana Group, Araripe Basin, Brazil

REVISTA BRASILEIRA DE PALEONTOLOGIA, 2011
The Araripe Basin is located in northeastern Brazil between the states of Ceara, Piaui and Pernambuco (Figure 1). The Crato and Romualdo formations (Santana Group, see details in Neumann & Cabrera, 1999; Valenca et al., 2003) that comprise the most fossiliferous strata of this basin, are famous worldwide for the diverse and exquisitely well preserved ...
Gustavo Oliveira, Antônio Álamo Saraiva, Helder Silva, José Artur Andrade, Alexander Kellner   +4 more
openaire   +1 more source

Structural mapping from MSS-LANDSAT imagery: A proposed methodology for international geological correlation studies [PDF]

A methodology is proposed for international geological correlation studies based on LANDSAT-MSS imagery, Bullard's model of continental fit and compatible structural trends between Northeast Brazil and the West African counterpart.
Crepani, E., Dejesusparada, N., Martini, P. R.   +2 more
core   +1 more source

Silicified termite coprolites in mesquite-like wood from the Miocene of La Rioja, Argentina [PDF]

, 2013
Coprolite-filled borings in fragments of non-decayed wood showing affinity with the mesquite-like morphogenus Prosopisinoxylon Martinez are described from Miocene strata from La Rioja, northwestern Argentina.
García Massini, Juan Leandro, Pujana, Roberto Roman   +1 more
core   +1 more source

Esporas triletes verrucosas de la Formación Lagarcito (Albiano?) Sierra de Guayaguas, Provincia de San Juan, Argentina. Análisis bioestratigráfico [PDF]

, 2013
Verrucate trilete spores from the Lagarcito Formation (Albian?) Sierra de Guayaguas, San Juan Province, Argentina. Biostratigraphic analysis. A detailed study of the systematics of thirteen species of verrucate trilete spores recovered from the Lagarcito
Mego, Natalia, Prámparo, Mercedes Beatriz   +1 more
core   +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