Dinosaur eggshells can reveal the age of other fossils
Summary
Ars Technica reports a new method to date fossils by dating dinosaur eggshells using uranium-lead dating. Samples from Utah and Mongolia yield ages around 95 and 99 million years, aligning with surrounding bedrock and expanding the range of rocks that can be dated with radioisotopes. The approach has potential to improve dating of continental sedimentary basins and fossil assemblages.