leaf location (IMAGE)

Penn State

leaf location

Caption

Researchers collect fossils cliffside in the Lefipan formation in southern Argentina. The scientists pictured mid-cliff are searching a layer of the late Cretaceous period, while the sandstone ledge above them marks the beginning of the Paleogene period.

Credit

Peter Wilf, Penn State

Usage Restrictions

non commercial use only

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.