Gastropods in French Buhr (image) American Geosciences Institute Caption A) This is a planorbid near charophyte gyrogonite (upper left), CMNH 14695G from Duncan Grist Mill, scale bar 1 mm. Credit J.T. Hannibal et al.; SEPM (Society for Sedimentary Geology) Usage Restrictions None 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.