Fossil Shells (IMAGE) University of Texas at Austin Caption These Middle Eocene gastropod shells from Texas are just a small sample of the fossils in amateur paleontologist Christopher Garvie's collection. The study leveraged Garvie's fossils to study how past periods of climate change impacted mollusks along the Gulf Coast of the United States. Credit Christopher Garvie Usage Restrictions Include photo credit 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.