Results 81 to 90 of about 64,690 (275)
Journal of Petroleum Geology, EarlyView.ABSTRACT In the Recôncavo Basin, Northeast of Brazil, mud diapirs have been reported for decades, but their role within the basin's petroleum system remains poorly constrained. Here, we combine 2D seismic interpretation, field observations, and organic geochemical analyses of rocks and oil seeps to investigate the relationship between diapirism and ...
Cora Mattos +3 more
wiley +1 more source
Pterosaur teeth from the Southern Neuquén Basin (Patagonia, Argentina): New insights on the reconstruction of ornithocheiriform dental anatomy [PDF]
Acta Palaeontologica PolonicaThe pterosaur fossil record of Argentina is increasing in recent times, both in the number of localities and their temporal range. The new materials are found in levels that span from the Late Triassic to the Late Cretaceous in age.
ALESSIO CIAFFI, FLAVIO BELLARDINI
doaj +1 more source
Cyrioctea (Araneae, Zodariidae) in Africa: temperate Gondwanaland relict, recent radiation, or both? [PDF]
, 2013 Two new species of the zodariid genus Cyrioctea Simon, 1889 are described: C. sawadee sp. nov. and C. lotzi sp. nov., both only known from males. The genus now contains seven Afrotropical species and this abundance is discussed in the context of its ...
Jocqué, Rudy C.A.M.
core +2 more sources
First direct evidence for a contiguous Gondwana shelf to the south of the Rheic Ocean
Geology, 2019 Sea-level rise after the Hirnantian glaciation resulted in the global inundation of continental shelf areas and the widespread formation of early Silurian black shales.
R. Romer, U. Kroner
semanticscholar +1 more source
Sedimentology, EarlyView.ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder +2 more
wiley +1 more source
Coniferophytes from the Bajo de Veliz Formation (Gzhelian-Asselian), San Luis Province, Argentina
Acta PalaeobotanicaIn this contribution, we analyze the presence of fossil coniferophytes from the Bajo de Veliz Formation (Paganzo Basin) that were initially referred to Walchia or Paranocladus and have not been described until now.
Johana Antonella Fernandez +2 more
doaj +1 more source
Detrital zircon SHRIMP U-Pb age study of the Cordillera Darwin Metamorphic Complex of Tierra del Fuego : sedimentary sources and implications for the evolution of the Pacific margin of Gondwana [PDF]
, 2010 The Cordillera Darwin Metamorphic Complex in the southernmost Andes includes a basement of probable Palaeozoic age, a mid-Jurassic and younger volcano-sedimentary cover, and a suite of Jurassic granites, all of which were jointly metamorphosed during the
Calderon, M. +6 more
core +1 more source
Detrital Zircons Dismember Sibumasu in East Gondwana
Journal of Geophysical Research: Solid Earth, 2018 Sibumasu is inferred to have developed as a united terrane in East Gondwana, with West Sumatra linked to Cathaysia. New detrital zircon U‐Pb and Hf isotopic data from Sumatra, complemented by literature data, challenge the above views.
Xiaoran Zhang +6 more
semanticscholar +1 more source
Terra Nova, EarlyView.ABSTRACT Deep crustal fragments and structural lineaments identified through satellite gravity data provide evidence for the extension of the reworked ancient basement of the Central African Block into the northern São Francisco Craton and southern Borborema Province.
Douglas Teixeira Martins +3 more
wiley +1 more source
Overture for the Mandara and Vasuki Plates
TektonikaModels of past plate motions in the Indian Ocean help map the supercontinent Gondwana and investigate how mantle plumes influence plate tectonics. Reducing confidence in this, however, the range of available models all produce large pre-94 Ma movements ...
Graeme Eagles
doaj +1 more source