Leidman, Sasha Z.; Rennermalm, Åsa K.; Broccoli, Anthony J.; van As, Dirk; van den Broeke, Michiel R.; Steffen, Konrad; Hubbard, Alun Lloyd
Journal: Frontiers in Earth Science
Kreitsmann, T.; Lepland, Aivo; Bau, M.; Prave, A.R.; Paiste, Kärt; Mänd, K.; Sepp, H.; Martma, T.; Romashkin, A.E; Kirsimäe, K.
Journal: Precambrian Research
Waghorn, Kate Alyse; Vadakkepuliyambatta, Sunil; Plaza-Faverola, Andreia; Johnson, Joel E; Bünz, Stefan; Waage, Malin
Journal: Scientific Reports
Lane, T.P.; Paasche, Øyvind; Kvisvik, B.; Adamson, K.R.; Rodés, Á.; Patton, Henry; Gomez, N.; Gheorghiu, D.; Bakke, J.; Hubbard, Alun Lloyd
Journal: Geophysical Research Letters
Petrini, Michele; Colleoni, Florence; Kirchner, Nina; Hughes, Anna L.C.; Camerlenghi, Angelo; Rebesco, Michele; Lucchi, Renata Giulia; Forte, Emanuele; Colucci, Renato R.; Noormets, Riko; Mangerud, Jan
Journal: Quaternary Science Reviews
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.