Results 21 to 30 of about 3,256 (202)
Oxygenated Mesoproterozoic lake revealed through magnetic mineralogy [PDF]
Proceedings of the National Academy of Sciences, 2018 Terrestrial environments have been suggested as an oxic haven for eukaryotic life and diversification during portions of the Proterozoic Eon when the ocean was dominantly anoxic. However, iron speciation and Fe/Al data from the ca. 1.1-billion-year-old Nonesuch Formation, deposited in a large lake and bearing a diverse assemblage of early eukaryotes ...
Slotznick, Sarah P +2 more
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The aerobic diagenesis of Mesoproterozoic organic matter [PDF]
Scientific Reports, 2018 AbstractThe Xiamaling Formation in the North China Block contains a well-preserved 1400 Ma sedimentary sequence with a low degree of thermal maturity. Previous studies have confirmed the dynamic and complex nature of this evolving marine setting, including the existence of an oxygen-minimum zone, using multi-proxy approaches, including iron speciation,
Wang, Xiaomei +6 more
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Terrestrial microbialites provide constraints on the mesoproterozoic atmosphere
The Depositional Record, 2020 Palaeoclimate data indicate that Earth surface temperatures have remained largely temperate for the past 3.5 Byr despite significantly lower solar luminosity over this time relative to the present day.
Michael T. Hren, Nathan D. Sheldon
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Геодинамика и тектонофизика, 2022 For the first time there were obtained LA-ICP-MS U-Pb age data on detrital zircons from sediments of the Bystraya and Ernichnaya formations of the Argun series of the northwestern Argun continental massif.
Yu. N. Smirnova, V. B. Khubanov
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Lithostratigraphy of the Mesoproterozoic Bethesda Formation
South African Journal of Geology, 2017 The metamorphic Bethesda Formation forms part of the Areachap Group, a volcano-sedimentary unit affected by the 1.2 to 1.0 Ga tectonothermal event in the Namaqua Sector of the Mesoproterozoic Namaqua-Natal Metamorphic Province. It comprises mainly pale brown biotite- and muscovite-rich metapelitic and quartzitic schist and gneiss with subordinate ...
H. Minnaar, D.H. Cornell, R.H. Bailie
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Geosciences, 2013 Over 100 new Nd isotope analyses for the central Grenville Province in the Parent-Clova region of Quebec help fill a major gap in understanding the crustal accretion history of the province.
Alan Dickin, Mark Zelek
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Nature Communications, 2022 “Ulvophyceae is a remarkably morphologically and ecologically diverse clade of green algae. Here, the authors reconstruct the Ulvophyceae phylogeny, showing that these algae originated earlier than expected and may have influenced biogeochemical cycles ...
Zheng Hou +8 more
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Petroleum geological conditions and exploration importance of Proterozoic to Cambrian in China
Petroleum Exploration and Development, 2018 The discovery of the giant Anyue gas field in Sichuan Basin gives petroleum explorers confidence to find oil and gas in Proterozoic to Cambrian.
Wenzhi ZHAO +4 more
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The Depositional Record, 2022 The Mesoproterozoic Rossport Formation of Ontario, Canada is generally interpreted as having been deposited in an intracratonic basin, most probably a rift‐related lake. While the Rossport, overall, is dominated by sandstone and shale, the Middlebrun Bay
Julie K. Bartley +2 more
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Frontiers in Earth ScienceIntroductionThe North China Craton experienced multiple episodes of Mesoproterozoic anorogenic magmatism, which provides critical insights into the breakup process of the Columbia supercontinent.
Junping Cui +7 more
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