scholarly journals New marine data and age accuracy of the Romualdo Formation, Araripe Basin, Brazil

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Robbyson Mendes Melo ◽  
Juliana Guzmán ◽  
Débora Almeida-Lima ◽  
Enelise Katia Piovesan ◽  
Virgínio Henrique de Miranda Lopes Neumann ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northeast Brazil ◽  
Planktic Foraminifera ◽  
Facies Associations ◽  
Marine Data

Abstract A combined biostratigraphic and palaeoecological study of foraminifera, ostracodes and microfacies was carried out on the Aptian in the Sítio Sobradinho section of the Araripe Basin, northeast Brazil. The analysed section represents a deepening-upward sequence with mid-ramp shoal and outer ramp to basin facies associations on a mixed siliciclastic-carbonate marine ramp. The analysed rocks are dominated by Early Cretaceous planktic foraminifera (Hedbergella aptiana, H. praelippa, H. sigali, Blesfucuiana cf. cumulus, Microhedbergella miniglobularis, Gorbachikella cf. kugleri, Pseudoguembelitria blakenosensis, Globigerinelloides clavatus, Globigerinelloides aff. aptiensis, Gubkinella sp. and Loeblichella sp.). Ostracoda fauna is composed mainly of Pattersoncypris crepata and Pattersoncypris micropapillosa. The occurrence of P. crepata associated with the Aptian planktic foraminifera demonstrates the potential of this ostracode species to date this interval. The planktic foraminifera from the upper Aptian (Microhedbergella miniglobularis Zone) of the Araripe Basin show characteristical Tethyan affinities.

Depositional controls on lacustrine coquinas from an early cretaceous rift lake: Morro do Chaves Formation, Northeast Brazil

2021 ◽  
Vol 124 ◽  
pp. 104852
Author(s):  
Julia Favoreto ◽  
Bruno Valle ◽  
Leonardo Borghi ◽  
Patrick Führ Dal’ Bó ◽  
Marcelo Mendes ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northeast Brazil ◽  
Rift Lake ◽  
Depositional Controls

scholarly journals Facies architecture of the fluvial Missão Velha Formation (Late Jurassic–Early Cretaceous), Araripe Basin, Northeast Brazil: paleogeographic and tectonic implications

2017 ◽  
Vol 67 (4) ◽  
pp. 515-545 ◽  
Author(s):  
Gelson Luís Fambrini ◽  
Virgínio Henrique M.L. Neumann ◽  
José Acioli B. Menezes-Filho ◽  
Wellington F. Da Silva-Filho ◽  
Édison Vicente De Oliveira
Keyword(s):  
Sand Dunes ◽  
High Energy ◽  
Coarse Grained ◽  
Dispersion Pattern ◽  
Northeast Brazil ◽  
River Systems ◽  
Alluvial Deposits ◽  
Architectural Elements ◽  
Overbank Flow ◽  
Facies Associations

Abstract Sedimentological analysis of the Missão Velha Formation (Araripe Basin, northeast Brazil) is the aim of this paper through detailed facies analysis, architectural elements, depositional systems and paleocurrent data. The main facies recognized were: (i) coarse-grained conglomeratic sandstones, locally pebbly conglomerates, with abundant silicified fossil trunks and several large-to-medium trough cross-stratifications and predominantly lenticular geometry; (ii) lenticular coarse-to-medium sandstones with some granules, abundant silicified fossil wood, and large-to-medium trough cross-stratifications, cut-and fill features and mud drapes on the foresets of cross-strata, (iii) poorly sorted medium-grained sandstones with sparse pebbles and with horizontal stratification, (iv) fine to very fine silty sandstones, laminated, interlayered with (v) decimetric muddy layers with horizontal lamination and climbing-ripple cross-lamination. Nine architectural elements were recognized: CH: Channels, GB: Gravel bars and bed forms, SB: Sand bars and bedforms, SB (p): sand bedform with planar cross-stratification, OF: Overbank flow, DA: Downstream-accretion macroforms, LS: Laminated sandsheet, LA: Lateral-accretion macroforms and FF: Floodplain fines. The lithofacies types and facies associations were interpreted as having been generated by alluvial systems characterized by (i) high energy perennial braided river systems and (ii) ephemeral river systems. Aeolian sand dunes and sand sheets generated by the reworking of braided alluvial deposits can also occur. The paleocurrent measurements show a main dispersion pattern to S, SE and SW, and another to NE/E. These features imply a paleodrainage flowing into the basins of the Recôncavo-Tucano-Jatobá.

Early Cretaceous (Aptian–Albian) Wildfires in the Araripe Basin, Northeast Brazil: Palaeoclimatic and Palaeoenvironmental Implications

2021 ◽  
pp. 1-12
Author(s):  
Flaviana Jorge de Lima ◽  
Etiene Fabbrin Pires ◽  
Antônio Álamo Feitosa Saraiva ◽  
Juliana Manso Sayão ◽  
André Jasper ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northeast Brazil

The Orthoptera (Ensifera) from the Santana formation (Early Cretaceous, Northeast Brazil): A statistical and paleoecological approach, with description of new taxa

Zootaxa ◽  
2009 ◽  
Vol 2080 (1) ◽  
pp. 21-37 ◽  
Author(s):  
RAFAEL GIOIA MARTINS-NETO ◽  
LARA VAZ TASSI
Keyword(s):  
New Taxa ◽  
Early Cretaceous ◽  
Statistical Approach ◽  
Northeast Brazil ◽  
Crato Member ◽  
Santana Formation

This paper on the Araripe orthopterofauna reviews the Cearagryllus-like Grylloidea (Orthoptera: Ensifera) from the laminated limestone of the uppermost part of the Crato Member, lowest unit of the Santana Formation (Early Cretaceous), Araripe Basin, near Santana do Cariri and Nova Olinda municipalities (Ceará State, Northeast Brazil). The following new taxa are proposed: Notocearagryllus arturandradai n. sp., Cryptocearagryllus revelatus n. gen. et n. comb., Allocearagryllus leipnitzi n. gen et n. comb., Cearagrylloides perforatorius n. gen. et n. comb., Cearagrylloides microcephalus n. gen. et n. comb., Cearagrylloides previstus n. gen. et n. comb., and Paracearagryllus poliacanthus n. gen. et n. comb. (Cearagryllinae n. subfam.). Additionally new data on the paleoecology and paleoethology are furnished as well as a statistical approach.

The transgressive-regressive cycle of the Romualdo Formation (Araripe Basin): Sedimentary archive of the Early Cretaceous marine ingression in the interior of Northeast Brazil

2017 ◽  
Vol 359 ◽  
pp. 1-15 ◽  
Author(s):  
Michele Andriolli Custódio ◽  
Fernanda Quaglio ◽  
Lucas Veríssimo Warren ◽  
Marcello Guimarães Simões ◽  
Franz Theodor Fürsich ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northeast Brazil ◽  
Marine Ingression

Evidence of An Early Cretaceous Giant Dyke Swarm in Northeast Brazil (South America): A Geodynamic Overview

2016 ◽  
Vol 90 (s1) ◽  
pp. 109-110
Author(s):  
Maria Helena B.M. HOLLANDA ◽  
Carlos J. ARCHANJO ◽  
Paul R. RENNE ◽  
Donald E. NGONGE ◽  
David L. CASTRO ◽  
...  
Keyword(s):  
South America ◽  
Early Cretaceous ◽  
Dyke Swarm ◽  
Northeast Brazil

On the piscivorous behaviour of the Early Cretaceous amiiform neopterygian fish Calamopleurus cylindricus from the Santana Formation, northeast Brazil

2013 ◽  
Vol 92 (2-3) ◽  
pp. 119-122 ◽  
Author(s):  
E.W.A. Mulder
Keyword(s):  
Early Cretaceous ◽  
Stomach Content ◽  
Prey Preference ◽  
Northeast Brazil ◽  
Santana Formation ◽  
Prey Items

AbstractA specimen of the Early Cretaceous amiiform fish Calamopleurus cylindricus with stomach content is described from the Santana Formation, Brazil. The prey concerns a smaller conspecific individual. Until now, prey items documented for Calamopleurus almost exclusively involved the aspidorhynchid Vinctifer. On the basis of the present record it is suggested that the prey preference of Calamopleurus was less pronounced than previously assumed.

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