Teresa Baraza Piazuelo samples groundwater (IMAGE) Geological Society of America Caption Teresa Baraza Piazuelo samples groundwater as it exits the mouth of Cliff Cave, outside of St. Louis, Missouri, USA, during low/normal flow in February 2020. The cave is on Osage and Illini homelands, and is a Sacred Site for the Osage nation. Credit Teresa Baraza Piazuelo Usage Restrictions Credit Teresa Baraza Piazuelo 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.