A previously unrecognized mode of fossilization of ancient microbes may explain how some of Earth’s oldest microfossils formed, according to new research. Rasmussen & Muhling show that the infiltration of liquid hydrocarbons was responsible for the formation of these filamentous microfossils from the Red Dog Zn-Pb-Ag massive sulfide deposit in the western Brooks Range, northern Alaska, the United States. Image credit: Rasmussen & Muhling,...
