About the Authors

Adiël A. Klompmaker


Affiliation Department of Geology, Kent State University, Kent, Ohio, United States of America

René H. B. Fraaije

Affiliation Oertijdmuseum De Groene Poort, Boxtel, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AAK RHBF. Performed the experiments: AAK RHBF. Analyzed the data: AAK RHBF. Contributed reagents/materials/analysis tools: AAK RHBF. Wrote the paper: AAK RHBF.