Carboniferous flora (IMAGE) University of Barcelona Caption The study reveals the ecological distribution of the precursor plants of coal formation (Sigillaria brardii species) in the Pyrenees regarding a global climate change. Credit UNIVERSITY OF BARCELONA Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.