Image: Tufa petroglyph site

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Description: Winnemucca Lake, NV, USA. Petroglyphs were carved into the tufa structures by prehistoric Native Americans. Radiocarbon dating of tufa laysrs covering the petroglyphs in 2013 showed these to be the oldest known petroglyphs in the Americas. Formal designation: archaeological site 26 Wa 3329, Scale: The tree shaped petroglyph at the left side is aprox. 70cm long, Dating: between 11.300 and 10.500 calibrated years B.P.
Title: Tufa petroglyph site
Credit: https://dx.doi.org/10.1016/j.jas.2013.06.022 Fig. 2
Author: Larry V. Benson, USGS
Permission: This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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Winnemucca Lake

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