For a study now published in Science China Earth Sciences, Dr. Daofu Song (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing) and his team collected cutinite-rich coals from the Upper Carboniferous Taiyuan Formation in the Hequ area, China, and studied their petrological and geochemical characteristics.
Click here for original story, Petrology and geochemistry of the Carboniferous cutinite-rich coals from the Hequ area of China
Source: Phys.org