Rock Art - Petroglyphs, Pictograms, Geoglyphs and other non-verbal communication:
Communication by the ancients who inhabited Utah and the surrounding states, particularly in the four-corners area is realtively prolific. New petroglyphs are found regularly and I believe people have now come to understand not to add to these ancient works of art / communication and preserve them for the future. This page is dedicated to showing the work done by these inhabitants of this part of North America.
I will add photos of geoglyphs discovered in Peru that are enormous. The image of the character with what appears as antenna or dreadlocks protruding from is head, three straight up and three sticking out from each side of the head is 120 meters (yards) in length. There are a series of these large geoglyphs that cover an area of approximately 50 sq. kilometers. Who or what were they communicating with?  Communication, obviously, important to ancient man.  

Newpaper Rock  

Newpapaer rock is on State Hwy. 211, the only road that leads to the south entrance to Canyonlands National Park.  It is approximately 19 miles from Hwy 191, the Highway between Moab, Ut. and Monticello, Ut.  Newspaper Rock is known to be one of the most important petroglyphs in North America with entries made over several hundred years by a variety of cultures or tribesTake note of how many of the feet etched into Newpaper rock have six toes. Why? Will we eventually end up with four or three toes?  
Peruvian Geoglyphs
Nazca lines are located in the south of Peru and are a group of geoglyphs that extend in the pampas of Jumana.  They encompass an area of nearly 1,000 square kilometers. Aracama Giant is 119 meters (yards) long.  There are about 300 different figures.  These figures were created between 900 - 1,450 AD  Some are up to 30 meters (yards) wide and more than 9 kilmeters long.  It would seem obvious these were meant to be seen from great distances, perhaps from mountains nearby, or from the sky.  There are messages and meaning to all protroglyphs that present-day man, without all our since available to us, continues to attempt to decipher and understand.  A landing strip for some ancient air-born craft?  
The Kokopeli petroglyphs are found in Mexico.

Utah Petroglyphs

Approximately twenty-five miles up Soldier Canyon, running east from Wellington, Nine-Mile Canyon Petroglyphs begin.  Numerous petroglpys adorn canyon walls and then culminate in the Great Hunt petroglyph near the end and top of Nine-Mile Canyon.  The majority of the land up this canyon is private property and potentially relatively unexplored.  I would believe that in the many side canyons many more petroglyphs exist.  The first or two petroglyphs are marked, but most are not.  Driving slowly (there is virtually no traffic) and having a passanger help search for these would be very helpful.  The following photos are not the best as I am still learning about how lighting conditions impact the appearance of petroglyphs in photos.  Harsh mid-day sun is far from ideal lighting.  

At the beginning of Soldier Canyon are the ramains of the Soldier Canyon Mine.  Once you see the decaying guard house, you know you've on the right road.

The FIRST SITE and I believe the second or third may be market, but the markers for the rest seem to have vanish.  Soldier Canyon has an extended history dating back to early Utah mining and the Civil War.  It was once the main stage-coach route to California and minimal remnants of two ghost towns remain.   Most the canyon is now commited to ranching, growing winter feed, and oil and natural gas extraction.  Black civil war volunteers who'd been given land grants in California for their service became temporarilly stranded in the canyon during the winter as they were heading to their land grants.  Reports indicate that there were a number of bars near the stage-coach stop along with several houses of ill repute.  Aside from petroglyphs, the canyon has history.