Las Hoyas, Spain (IMAGE) The University of Hong Kong Caption Las Hoyas, Spain is known for spectacular fossils preserved in 126+ million-year-old rocks deposited in a lake environment. Credit Image Credit: HKU MOOC / HKU Vertebrate Palaeontology Laboratory. Usage Restrictions Please credit @HKU MOOC / HKU Vertebrate Palaeontology Laboratory. 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.