Metagabbros, metasyenites and related rocks in the Outokumpu assemblage, east Finland [PDF]
Bulletin of the Geological Society of Finland, 1992 A diverse group of minor intrusive rocks in the early Proterozoic Outokumpu assemblage of eastern Finland include metagabbro, hornblendite, amphibolite, pyroxenite, syenite and chloritized dykes.
A.F. Park
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Геодинамика и тектонофизика, 2023 The paper presents the first U-Pb (LA-ICP-MS) dating results for detrital zircons from the quartzsericite-chlorite schist of the Anai formation within the Baikal salient of the Siberian platform basement.
U. S. Efremova +4 more
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New palaeomagnetic data for Palaeoproterozoic AMCG complexes of the Ukrainian Shield
Геофизический журнал, 2023 A palaeomagnetic study of rocks for two Palaeoproterozoic anorthosite-mangerite-charnockite-granite (AMCG) complexes in the Ukrainian Shield was done to put additional constraints on the interpretation of palaeogeography of Fennoscandia and Volgo ...
V.G. Bakhmutov +3 more
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Journal of Asian Earth Sciences: X, 2023 Gas discovery in Nohta-2 well from Proterozoic Rohtas plays in Vindhyan Basin, south of Ganga Basin has been a significant lead to suggest that Proterozoic sediments underneath Ganga Basin could be prospective. With this in view, the Govt. of India (GOI)
Surajit Gorain +2 more
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Eukaryotic organisms in Proterozoic oceans [PDF]
Philosophical Transactions of the Royal Society B: Biological Sciences, 2006 The geological record of protists begins well before the Ediacaran and Cambrian diversification of animals, but the antiquity of that history, its reliability as a chronicle of evolution and the causal inferences that can be drawn from it remain subjects of debate. Well-preserved protists are known from a relatively small number of
Knoll, A. H. +3 more
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Precambrian glaciations and the evolution of the atmosphere [PDF]
Annales Geophysicae, 1994 Precambrian glaciations appear to be confined to two periods, one in the early Proterozoic between 2.5 and 2 Gyears BP (Before Present) and the other in the late Proterozoic between 1 and 0.57 Gyear BP. Possible reasons for these broad features of the
J. H. Carver, I. M. Vardavas
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On the ages of some granitoid and schist complexes in northern Finland [PDF]
Bulletin of the Geological Society of Finland, 1982 Contact observations and most radiometric datings indicate that the large complex of granitoid rocks and migmatites in Central Lapland is late Svecokarelian (Proterozoic) in age. The geological setting of the complex suggests, however, that it previously
R. Lauerma
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Geophysical Monograph Series, Page 137-165., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Konstantin Litasov +3 more
wiley +2 more sources
Not armour, but biomechanics, ecological opportunity and increased fecundity as keys to the origin and expansion of the mineralized benthic metazoan fauna [PDF]
, 2005 This paper offers a new biotic interaction hypothesis for the Cambrian 'explosion' of mineralized, benthic, metazoan diversity. It proposes that organic-mineral composite structures (e.g.
Cohen, B.L.
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Earth's anomalous middle-age magmatism driven by plate slowdown
Scientific Reports, 2022 The mid-Proterozoic or "boring billion" exhibited extremely stable environmental conditions, with little change in atmospheric oxygen levels, and mildly oxygenated shallow oceans.
C. O’Neill +3 more
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