Results 101 to 110 of about 5,193 (249)
An occurrence of Lower Palaeozoic rocks within the Precambrian terrain near Sukkertoppen
Rapport Grønlands Geologiske Undersøgelse, 1966 An occurrence of Lower Palaeozoic rocks within the Precambrian terrain near Sukkertoppen, West Greenland, was discovered in 1965 by Caj Kortman and Jens Gothenborg working under fil. mag. L. Keto for Kryolitselskabet Øresund AIS, Copenhagen. The material was kindly placed at the disposal of the writer for further study.
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, 1988 p. 1 - 17The Rio Itapicuru greenstone belt is situated within the Silo Francisco craton, and is the largest of a series of N-S trending volcanosedimentary sequences surrounded by gneisses and granitoids.
Teixeira, João Batista Guimarães +4 more
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The Upper Precambrian of South America
, 1976 This paper deals with the structural organization and tectonic evolution of South American Continent basement during the Upper Precambrian. The South American Platform is the old platform of South America.
Hasui, Yociteru +2 more
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Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.Abstract Crust formed in volcanic arcs is accreted to continents over geologic time, serving as the source material for new continental crust in Earth's present and recent past. Geochemically, arcs are found to be significantly more mafic than bulk continental crust.
Hannah F. Mark +4 more
wiley +1 more source
, 1991 Texto completo: acesso restrito. p. 283–314Numerous alkaline massifs occur throughout the state of Bahia (Brazil). Isotopic dates fall into two age groups: Brasiliano (0.45–0.70 Ga) and Trans-Amazon (1.8–2.1 Ga) ones.
Sabaté, Pierre +2 more
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The palynology and stratigraphy of the Cambrian Nolichucky Shale and associated formations at Thorn Hill, Tennessee, USA [PDF]
, 2012 A detailed palynological and stratigraphic study was undertaken on the Cambrian Nolichucky Shale, Maynardville Limestone and Copper Ridge Dolomite (Conasauga Group), as exposed at Thorn Hill, northeastern Tennessee, USA.
Pedder, Brian E
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Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 6, June 2026.Abstract Understanding dissolved organic carbon (DOC) fluxes in boreal freshwater systems is critical for constraining high‐latitude carbon budgets and anticipating climate‐driven changes. Here, we present a retrospective assessment (2000–2024) of DOC fluxes in the Upper Mackenzie River watershed, focusing on Great Slave Lake (GSL), a key hydrological ...
Jiyeong Hong +8 more
wiley +1 more source
The Journal of Geology, 1969 Classical phylogenies of the lower organisms are based on assumptions recently claimed to be erroneous. Alternative assumptions, more consistent with modern genetic and biochemical data, lead to the construction of new phylogenies. The new phylogenies (one for prokaryote organisms and one for eukaryotes) based on the symbiotic theory of the origin of ...
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A seismic study of the mid- and lower-crust beneath the sea of Bothnia: BABEL line 1 [PDF]
, 1994 In the Autumn of 1989, Durham University took part in the BABEL Project, a collaboration of scientists from five nations recording wide angle and normal incidence seismic data in the Baltic Shield.
Graham, Daniel P.
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Paleoceanography and Paleoclimatology, Volume 41, Issue 6, June 2026.Abstract The Laurasian Seaway comprises a N‐S oriented trans‐Pangaean corridor linking Tethys to the Boreal Sea during the Jurassic, and direction of water flow has been the subject of considerable debate. The Llanbedr (Mochras Farm) borehole, Cardigan Bay Basin, Wales, is a uniquely informative record that comprises an expanded deep‐marine silty ...
M. Jiang +7 more
wiley +1 more source