Geoglyph

These, and almost 100 others stretched along the Colorado River in the California and Arizona deserts, are called geoglyphs or earth carvings by scientists. [...] Although their exact purpose and meaning are still a mystery, we do know these large and delicate geoglyphs are easily damaged by vehicles breaking through the desert surface and obliterating the figures.

Source: wiktionary

Geoglyphs usually are found on fans sparse of rock, but what seems the oldest of the scraped designs are on cobbled terraces at Denning Springs, Ocotillo, Death Valley, and above the Mojave River.

Source: wiktionary

Two of the prehistoric sites, a quarry and a special task area, are common in the region, but the other site, a geoglyph, is rare and unique.

Source: wiktionary

Another important form of artistic expression during the ERD period, particularly on the south coast of Peru, was gigantic geoglyphs or man-made desert markings. The idea is ancient. [...] Large geoglyphs are found as far south as the far north coast of Chile. However, by far the largest and best-known concentration occur on the stony desert plains around the Río Grande de Nazca drainage (in a roughly 200-km² area). They are popularly known as the "Nazca Lines."

Source: wiktionary