image: Outcrops of hydrothermal chert HC10, looking towards unconformity with the rocks of the section that contain the diamictites. This material relates to a paper that appeared in the Feb. 26, 2016, issue of Science, published by AAAS. The paper, by M.J. de Wit at Nelson Mandela Metropolitan University in Port Elizabeth, South Africa, and colleagues was titled, "3.5-Ga hydrothermal fields and diamictites in the Barberton Greenstone Belt--Paleoarchean crust in cold environments." view more
Credit: Maarten de Wit