Dating petroglyphs Webcam onlain

“Whether they turn out to be as old as 14,800 years ago or as recent as 10,500 years ago, they are still the oldest petroglyphs that have been dated in North America.” In fact, archaeological evidence found around the ancient West can be used to make a case for either date.On the west side of the Winnemucca Lake subbasin, Nevada, distinctive deeply carved meter-scale petroglyphs are closely spaced, forming panels on boulder-sized surfaces of a partially collapsed tufa mound.Liu compiled a massive data base that has now launched varnish microlaminations (VML) as the ideal method to understand petroglyph chronology in the Holocene and terminal Pleistocene (At the same time, rock varnish was viewed holistically within a new framework.But a new study, published in the Journal of Archaeological Science, reports that tests of residues found both on top of and underneath the glyphs dates them to at least 10,500 years ago — and perhaps has much as 14,800 years ago. The layer above them, meanwhile, dated to 10,500 years ago.

The critical breakthrough came from a decade-long project of basic research by Dr. Whereas prior researchers had written papers based on one sample, or at most a few dozen, Dr.Native American artifacts found in the Lahontan Basin date to the latter time interval.This does not rule out the possibility that petroglyph carving occurred between 14.8 and 13.2 ka when Pyramid Lake was relatively shallow and Winnemucca Lake had desiccated.Petroglyphs were still common though, and some cultures continued using them much longer, even until contact with Western culture was made in the twentieth century.Petroglyphs have been found in all parts of the globe except Antarctica with highest concentrations in parts of Africa, Scandinavia, Siberia, southwestern North America, and Australia.

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