Located near Clarkston WA on either side of an eddy formed by a series of sharp bends in the Snake River are densely grouped clusters of petroglyphs and a few pictographs. Known as Buffalo Eddy, the unique petroglyphs of this area are evidence of the longevity of the Nez Perce in the region and contain hundreds of distinct images that possibly date from as early as 4,500 years ago.
The method of carving into the rock here is mainly patination although on the Idaho side there is some later period pictograph art. Patination petroglyph is a pecking through the dark patina on the basalt bedrock characteristic of these areas. This patina, sometimes called desert varnish, is a brown to black stain that colors exposed rock surfaces
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