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Waage, Malin; Serov, Pavel; Andreassen, Karin; Waghorn, Kate Alyse; Bünz, Stefan

Journal: Scientific Reports

Cooper, Claire L.; Savov, Ivan P.; Patton, Henry; Hubbard, Alun; Ivanovic, Ruza F.; Carrivick, Jonathan L.; Swindles, Graeme T.

Journal: Quaternary Science Advances

Kipp, Michael A.; Lepland, Aivo; Buick, Roger

Journal: Precambrian Research

Mänd, Kaarel; Lalonde, Stefan V.; Robbins, Leslie J.; Thoby, Marie; Paiste, Kärt; Kreitsmann, Timmu; Paiste, Päärn; Reinhard, Christopher T.; Romashkin, Alexandr E.; Planavsky, Noah J.; Kirsimäe, Kalle; Lepland, Aivo; Konhauser, Kurt O.

Journal: Nature Geoscience

de Bar, Marijke W.; Weiss, Gabriella; Yildiz, Caglar; Rampen, Sebastiaan W.; Lattaud, Julie; Bale, Nicole J.; Mienis, Furu; Brummer, Geert-Jan A.; Schulz, Hartmut; Rush, Darci; Kim, Jung-Hyun; Donner, Barbara; Knies, Jochen; Lückge, Andreas; Stuut, Jan-Berend W.; Sinninghe Damsté, Jaap S.; Schouten, Stefan

Journal: Organic Geochemistry

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great oxydation event

Photo of the month

May-June

This is shungite, a unique carbon-rich sedimentary rock from Russia that deposited 2 billion years ago. It holds clues about oxygen concentrations on Earth’s surface at that time. According to a new study in Nature Geoscience, with participation from CAGE,  there were elevated levels of oxygen at the time when the shungite was deposited.

This contradicts the widely-accepted models of Earth’s carbon and oxygen cycles, which predict that shungite should have been deposited at a time of rapid decrease in oxygen levels.

Why is this important?: “These new findings are also crucial for understanding the evolution of complex life.” according to this article in Eurekalert.org. 

Geology. Pretty awesome.

Photo: Aivo Lepland, NGU/CAGE.

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