White Tank Mountains Petroglyphs – Waddell, Arizona - Atlas Obscura

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White Tank Mountains Petroglyphs

Waddell, Arizona

These petroglyphs created by ancient Arizonians have withstood centuries of exposure to the elements.  

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Through the winding Waterfall Canyon Trail, a few drawings stand out along the rocks. These drawings were left by nomadic people from around 500-1100CE, many of which are attributed to the Hohokam people who used water management techniques to farm and occupy permanent settlements in the White Tank Mountains. 

These drawings are carved into the “desert varnish” that surrounds the rocks of this region. Desert varnish is a film of patina produced by a combination of airborne clay, dirt, and microorganisms that accumulate on the surface of rocks over hundreds of years.

Using a handheld rock, the desert varnish can be chipped away to reveal the lighter rock underneath, which is how the petroglyphs were made. Since they were created by different peoples across the span of hundreds, if not thousands, of years, some are easily viewable, while others can only be seen from an angle as uncolored indentations on the rock.

No one knows for sure what purpose the petroglyphs served, but common theories suggest they were used as trail-markers, recordings of events, and representations of religious concepts.

Know Before You Go

The petroglyphs can be found throughout the Waterfall Canyon Trail. It is extremely important that you do not make "tombstone rubbings" of the petroglyphs. It doesn’t work at all and you will erode the dark areas, making the petroglyph dimmer. Skin oils can also damage them, so they should not be touched. The petroglyphs should only be looked at and photographed.

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