Blythe Intaglios: The Impressive Anthropomorphic Geoglyphs in California’s Desert

Blythe Intaglios: The Impressive Anthropomorphic Geoglyphs in California’s Desert
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Blythe Intaglios: The Impressive Anthropomorphic Geoglyphs in California’s Desert

Blythe Intaglio

Gigantic human or animal figures drawn on the surface of the ground are Intaglios also called geoglyphs. In Peru, the Nazca Lines are the most well-known geoglyphs in the world, but in the Colorado Desert, there are more than 200 intaglios.

In North America, they are the only known desert intaglios. The best known are located on two low mesas west of the Colorado River approximately 15 miles north of Blythe, California ..

Scientists have not been able to agree on who made these giant drawings on the desert floor, nor when they were made. Theories range from a couple of hundred years up to 10,000 years old. Radiocarbon dates for the figures range from 900 BCE to 1200 CE.

Some historians believe that the figures were made by the Mohave and Quechan Indians somewhere between 450 and 2,000 years ago, and represent Mastamho, the creator of life.

Others believe the figures represent powerful individuals in an Indian clan or depict humans interacting with their natural surroundings. Most of the human figures are etched next to or near animal figures.

Extinct Horses

Part of the dating problem is that the animal figures appear to be horses. If so, they must have been carved either before American horses went extinct some 10,000 years ago or more recently after the Spaniards arrived in California in 1540.

Another theory holds that some modern horses did exist in North America before the Spaniards, but were regarded as food sources rather than bests of burden. The age of the “drawings” cannot be dated accurately.

The Blythe Intaglios, situated in three locations, contain three abstract human shapes, two four-legged animals resembling horses, and a spiral figure thought to be a coiled serpent, various geometric lines, and a dance ring that is 140 feet in diameter.

The largest human figure in the Blythe Intaglio group is 171 feet long and the smallest is 95 feet. They are best viewed from the air.

The Geoglyphs were created by scraping away the top layers of darker rocks or pebbles to reveal lighter soil beneath. The displaced rocks outlined the figures and the exposed soil was stamped down which makes it more difficult for plants to grow in the lines.

While these “gravel pictographs” are found through the deserts of southeastern California, human figures are found only near the Colorado River. Other intaglios depict mountain lions, birds, snakes, and unidentified animals like figures and geometric shapes. The figures are so immense that many of them were not observed by non-Indians until the 1930s.

In 1932, George Palmer, a pilot flying between Las Vegas, Nevada, and Blythe, California noticed the Blythe geoglyphs. His find led to a survey of the area by the Natural History Museum of Los Angeles County, California.

The interest in the Blythe intaglios leads to the search for and discovery of more desert intaglios. The Bureau of Land Management erected fences in 1974 to protect the intaglios and the Blythe Intaglios were placed on the National Register of Historic Places in 1982.

Similar intaglios, named the Ripley Group, were found nearby in Arizona across the Colorado River from Ripley, California.

No far from Blythe, at an associated site in Parker, Arizona is a different set of intaglios, similar in their abstract nature. A serpent glyph near Parker, complete with eyes and rattles, sprawls for also most 150 feet across the desert floor.

The desert figures are very similar to those figures carved on the Nazca Plains in Peru. Like the Nazca figures, both cover a vast area, include animal figures, and were made in the same manner by scraping off the top level of rocks.

Of the nearly 60 sites containing humanoid figures, almost all of them have a deeply entrenched torso, while the limbs are much more shallowly etched into the surface. Often, the head and/or one or more arms of the figure will not have been represented at all.

Historical Marker

The majority of the Blythe geoglyphs are located 15.5 miles north of Blythe, California, off Highway 95, at the Interstate 10 exit. Visitors will see a small stone cairn on the right. On the left is a fenced dirt road that quickly leads to the Intaglios 1/4 mile west. A historical marker commemorates the site.


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Jessica Saraceni has been a part of Histecho Since 2018, drawn to the site for its quirky character and through Articles about the Mysteries of earth and human behavior. previously, she was an assistant editor and Research fellow at Archaeology magazine, where she gained an appreciation for the field work. A master's degree in biogeochemistry and environmental science from the Center for Archaeological Research, the University of Texas at San Antonio. She enjoys all forms of exercise; reading works by her favorite author, Haruki Murakami; and playing with her sons.