Results 61 to 70 of about 3,072 (191)

Agricultural expansion dynamics of the São Desidério-BA municipality from 1984 to 2008, important national producer of soybean, cotton and corn [PDF]

open access: yes, 2012
O presente trabalho possui como objetivo analisar a dinâmica da expansão agrícola no município de São Desidério entre os anos de 1984 e 2008, localizado na mesoregião do Extemo Oeste da Bahia.
Carvalho Júnior, Osmar Abílio de   +5 more
core  

Schist Belts of the Benin‐Nigeria Shield Reveal a Neoproterozoic History

open access: yesTerra Nova, Volume 37, Issue 4, Page 239-249, August 2025.
ABSTRACT Belts of metasedimentary rocks (schist belts) in the Benin‐Nigeria Shield (BNS) are investigated for the first time using U–Pb dating and Lu‐Hf isotope analysis of detrital zircons. We report maximum depositional ages that place their deposition firmly in the Neoproterozoic and link them with strata in the Dahomey Belt, the central African ...
Axel Hofmann   +6 more
wiley   +1 more source

Idades U-Pb (LA-ICPMS) para as suítes Caraguataí e Jussiape, Bloco Gavião, Bahia

open access: yesBrazilian Journal of Geology
Resumo: A área de trabalho encontra-se inserida na porção nordeste do Cráton do São Francisco, no Bloco Gavião. O mapeamento geológico realizado na região de Abaíra-Jussiape permitiu identifcar duas suítes magmáticas, que foram denominadas de Caraguataí ...
Simone Cerqueira Pereira Cruz   +9 more
doaj   +1 more source

Análise da paisagem do maciço de cana brava pelo emprego de imagens de sensoriamento remoto e sistema de informação geográfica [PDF]

open access: yes, 2010
No presente trabalho, é proposto analisar a relação dos dados geológicos emorfométricos com as unidades vegetais detectadas pelo processamento digital deimagens de sensoriamento remoto.
Carvalho Júnior, Osmar Abílio de   +6 more
core  

Toward a More Stable Supercontinent Columbia in the Statherian

open access: yesGeophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract During the mid‐Proterozoic, nearly all of Earth's continents collided to form supercontinent Columbia. However, the exact timing of its formation is still debated, with estimates ranging from 1.8 to 1.6 Ga. This period, known as the Statherian, is also debated for its affinity to either the Paleoproterozoic or Mesoproterozoic eras.
Chong Wang   +6 more
wiley   +1 more source

Pedogeomorphological evolution model of Serra da Canastra, MG [PDF]

open access: yes, 2013
A gibbsita e as formas de ferro em solos tropicais são preferencialmente controladas pela posição na paisagem e variação das condições hídricas ao longo das pedossequências.
Carvalho Júnior, Osmar Abílio de   +8 more
core  

New Kinematic Model of the Early Opening of the Equatorial Atlantic Realm

open access: yesTectonics, Volume 44, Issue 5, May 2025.
Abstract The opening of the Equatorial Atlantic Ocean constitutes the final stage of Gondwana's breakup, leading to the separation of the African and South American continents. The early spreading has been debated due to the absence of magnetic anomalies related to the Early Cretaceous opening at low latitude, and an incomplete fracture zone record ...
Thomas Lesourd—Laux   +9 more
wiley   +1 more source

Proveniência dos sedimentos de porção aflorante do membro Angico, Formação Riachuelo, da sub-bacia de Sergipe [PDF]

open access: yes, 2015
The Sergipe-Alagoas Basin has one of the most complete stratigraphic succession of eastern and southeastern shores of Brazil. In Sub-basin of Sergipe the Riachuelo Formation occurs in the namesake city in Sergipe, about 30 km Northwest of the state ...
Santos, André Alves dos
core  

Interglacial dust, ocean fertilisation and Neoproterozoic earth oxygenation

open access: yesThe Depositional Record, Volume 11, Issue 2, Page 654-674, April 2025.
Mineral dust is an integral part of modern ocean nutrient supply. It is originated mainly in deserts and by glacial processes. Given the global scale of the Neoproterozoic glaciations, we suggest that mineral dust formed during snowball events were blown to oceans, sustaining life, promoting CO2 sequestration and contributing to the oxygenation of ...
Leandro G. DaSilva   +2 more
wiley   +1 more source

ANÁLISE GEOLÓGICA E ESTRUTURAL DAS FISSURAS E SUBSIDÊNCIAS NO CARSTE DE LAPÃO

open access: yesRevista Águas Subterrâneas, 2010
O evento geológico que ocorreu em Outubro de 2008 na cidade de Lapão causou rachaduras nas ruas, danificou seis casas, provocou fissuras no solo com até 20 cm de largura e subsidência localizada com até 15 cm em áreas rurais.
P. H. P Maia   +2 more
doaj  

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