Legend Rock petroglyphs: LAPC

In June, I visited Legend Rock State Petroglyph Site near Thermopolis, Wyoming. The quarter-mile-long sandstone cliff at an isolated site is adorned with hundreds of Legend Rock petroglyphs. When you walk the trail beside these images, it is truly a step back in time.

Seeing Legend Rock petroglyphs up close

Legend Rock petroglyphs

More than 300 petroglyphs have been identified on 92 rock panels. The oldest are at least 10,000 years old. The petroglyphs were carved by “ancestors of today’s Numic-speaking Eastern Shoshone tribe.” 

Due to the fantastical nature of the images carved here, this site is thought to have been used by individuals on vision quests. The images were carved so long ago, their exact meanings are unknown.

Legend Rock petroglyphs

In 1973, the state acquired the site and later that year, it was placed on the National Register of Historic Sites. The site included sections owned by the state and federal government, and private landowners. In 2015, local landowner Richard Wagner donated the last part needing protection.

Cliff face
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Reveal petroglyphs with digital magic: LAPC

Did you know you can reveal petroglyphs with a little digital magic? Yep, there’s an app for that. In this post, I’ll show you how I revealed several petroglyphs with the app, Rock Art Enhancer. Click through the slideshow of each image below.

In each of the first pictures, I show the original image. In the second, I used the Auto level and increase saturation tool. The third pictures show a variety of effects. All of these petroglyphs are located in southeast Oregon.

These petroglyphs were carved into rock thousands of years ago and over time they have become less clear. Unfortunately, the messages conveyed by many of these carvings are unknown. While some show obvious elements of wildlife, humans, and the sun, others are open to interpretation.

Revealing petroglyphs with an app

The first series shows petroglyphs on a rimrock cliff located in Harney County. The second effect brings out the details, but I prefer the almost psychedelic colors in the third image. The third effect used the Decorrelation Stretching (abbreviated as D. Stretch) YUV Custom tool.

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Petroglyphs & pictographs in Harney County, Oregon

In April 2019, I went on a field trip to see petroglyphs & pictographs in Harney County, in eastern Oregon. This is one of the many trips offered as a part of the Harney County Migratory Bird Festival. Our guides that day were Bureau of Land Management archaeologists, Scott Thomas and Carolyn Temple.

One of the first things we learned was the difference between petroglyphs and pictographs.

Pictographs

Pictographs, like the images shown below, are painted onto rocks. These works are generally drawn with red, black, white, or yellow paint.

Pictographs frequently include depictions of animals. For example, the drawing at the top of the picture below appears to be a lizard.

petroglyphs & pictographs, Harney county, OR
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