Hand Sample of Tava Sandstone (IMAGE) Geological Society of America Caption This is a hand sample of Tava sandstone; from Figure 2 of Siddoway and Gehrels. Credit Siddoway et al. Usage Restrictions Credit Siddoway et al. 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.