Freshwater Snail Fossils from Myanmar (IMAGE) University of Arizona Caption These 35-million-year-old snail fossils in Myanmar contain the record of the past climate in their shells. Analyses by University of Arizona geoscientist Alexis Licht and his colleagues show these snails lived in a monsoon climate that had dry winters and very rainy summers. These freshwater gastropods from the Yaw formation (37-34 million years ago) were sampled near the town of Kalewa in central Myanmar. Credit Alexis Licht 2012 Usage Restrictions his photo may only be used to illustrate a story about the research described in the news release titled "Asian Monsoon Much Older Than Previously Thought." The photo credit must be used with the photo. License Licensed content 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.