North America's Oldest Rock Art Is Located Here
Scientists date petroglyphs at Winnemucca Lake
By Evann Gastaldo, Newser Staff
Posted Aug 14, 2013 1:18 PM CDT
Updated Aug 14, 2013 1:40 PM CDT
Winnemucca Lake is the dry area to the right of Pyramid Lake, the blue lake to the left.   (Wikimedia Commons)

(Newser) – The oldest rock art in North America exists on limestone boulders at Nevada's now-dry Winnemucca Lake, a new analysis suggests. The petroglyphs, which include carvings of trees, leaves, and abstract designs, are likely between 10,500 and 14,800 years old, LiveScience reports. Scientists found the age by determining when the boulders were above the water line; there was a time when the lake was so full that the rocks, which are at an elevation of 3,960 feet, would have been submerged, UPI reports.

They did this by using radiocarbon tests, which revealed the age of the carbonate left on the rocks by the lake. They also analyzed sediment core nearby, and ultimately found the rocks were probably first exposed to air between 14,800 and 13,200 years ago, then again between 11,300 and 10,500 years ago. Previously, the oldest petroglyphs in North America were thought to be carvings at Long Lake, Oregon, that are believed to be at least 6,700 years old. As for what the Winnemucca rock art symbols mean, "We have no idea," says a researcher.

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Showing 3 of 34 comments
Aug 14, 2013 11:13 PM CDT
i thought the oldest rock art was on Mick Jagger's latest album...
Aug 14, 2013 9:57 PM CDT
One carving, roughly translated ; "Fred Flintstone was here".
Aug 14, 2013 9:14 PM CDT
The petroglyphs deal with the rise and fall of the Jaredite nation