Reply to Simon and Reed: Independent and converging results rule out historic disturbance and confirm age constraints for Barrier Canyon rock art

Proc Natl Acad Sci U S A. 2014 Dec 30;111(52):E5604. doi: 10.1073/pnas.1421319112. Epub 2014 Dec 23.

¹ Department of Geology and joel.pederson@usu.edu.
² Department of Geology and Geography and Earth Sciences, Aberystwyth University, Aberystwyth SY23 3DB, United Kingdom;
³ Department of Sociology, Social Work, and Anthropology, Utah State University, Logan, UT 84322;
⁴ Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University, DK-4000 Roskilde, Denmark; Center for Nuclear Technologies, Technical University of Denmark, DK-4000 Roskilde, Denmark; and.
⁵ Department of Geology and.
⁶ Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University, DK-4000 Roskilde, Denmark;
⁷ Canyonlands National Park, Moab, UT 84532.

No abstract available

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