Results 211 to 220 of about 31,446 (282)
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A shale-hosted Cr isotope record of low atmospheric oxygen during the Proterozoic
Geology, 2016Devon B Cole +2 more
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Statistical analysis of iron geochemical data suggests limited late Proterozoic oxygenation
Nature, 2015Erik A Sperling +2 more
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Tracing the stepwise oxygenation of the Proterozoic ocean
Nature, 2008Andrey Bekker
exaly +2 more sources
Proterozoic Ocean Chemistry and Evolution: A Bioinorganic Bridge?
Science, 2002 A. Anbar, A. Knoll
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A small marine biosphere in the Proterozoic
Geobiology, 2018The riverine supply of the globally limiting nutrient, phosphorus, to the ocean accounts for only a few percent of nutrient supply to photosynthetic organisms in surface waters.
T. Laakso, D. Schrag
semanticscholar +1 more source
Proterozoic Atmospheric Oxygen
2014This article is concerned with the evolution of atmospheric oxygen concentrations through the Proterozoic Eon. In particular, this article will seek to place the history of atmospheric oxygenation through the Proterozoic Eon in the context of the evolving physical environment including the history of continental growth and volcanic outgassing, as well ...
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Widespread iron-rich conditions in the mid-Proterozoic ocean
Nature, 2011Noah J Planavsky +2 more
exaly +2 more sources
2020
The Banded Gneiss Complex attached to the Aravalli Craton in the west with coeval Bundelkhand Craton in the center, the Singhbhum and the Meghalaya Cratons in the east, and the Bastar and Dharwar cratons in the south constitute the Precambrian nuclei of the Peninsular India.
A. K. Jain +2 more
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The Banded Gneiss Complex attached to the Aravalli Craton in the west with coeval Bundelkhand Craton in the center, the Singhbhum and the Meghalaya Cratons in the east, and the Bastar and Dharwar cratons in the south constitute the Precambrian nuclei of the Peninsular India.
A. K. Jain +2 more
openaire +1 more source
Proterozoic Fossil Cyanobacteria
Journal of Palaeosciences, 2012A monographic account is presented on the fossil Proterozoic cyanobacteria. It chronicles the 60 years of history of investigations on the Precambrian microfossils. The researches on Precambrian microfossils have revealed a new, earlier unknown, world of oldest microorganisms and divulged the steps in life’s evolution on the earth.
V. N. Sergeev +2 more
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1982
The Dominion Group, Witwatersrand Supergroup, and Ventersdorp Supergroup constitute a volcanosedimentary sequence that is famous for its fossil gold placers. It has been estimated that since gold-bearing conglomerates were discovered near Johannesburg (Fig. 4-1) in 1886, mines in the Transvaal and Orange Free State have produced more than 55 percent of
A. J. Tankard +5 more
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The Dominion Group, Witwatersrand Supergroup, and Ventersdorp Supergroup constitute a volcanosedimentary sequence that is famous for its fossil gold placers. It has been estimated that since gold-bearing conglomerates were discovered near Johannesburg (Fig. 4-1) in 1886, mines in the Transvaal and Orange Free State have produced more than 55 percent of
A. J. Tankard +5 more
openaire +1 more source