Cretaceous Limestone (IMAGE) University of Cincinnati Caption The Smoky Hill Chalk Member is a fossil-rich region of western Kansas where a new species of mosasaur was discovered. Credit Takuya Konishi Usage Restrictions None License Original 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.