https://www.livescience.com/61035-ancient-killer-whale-geoglyph-peru.html?utm_source=ls...

"Archaeologists rediscovered a giant geoglyph of a killer whale, etched into a desert hillside in the remote Palpa region of southern Peru, after it had been lost to science for more than 50 years.
The 230-foot-long (70 meters) figure of an orca — considered a powerful, semimythical creature in ancient Peruvian lore — may be more than 2,000 years old, according to the researchers.
They said it may be one the oldest geoglyphs in the Palpa region, and older than those in the nearby Nazca region, which is famous for its vast collection of ancient ground markings — the Nazca Lines — that include animal figures, straight lines and geometrical shapes.

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"After documenting the rediscovery, Isla led a team of six specialists from Peru's Ministry of Culture in an effort to clean and restore the orca geoglyph in March and April this year.
Before the restoration, the geoglyph was disappearing due to erosion and the passage of time. "Being drawn on a slope, it is easier [for it] to suffer damage than [for] those figures that are in flat areas, such as those of the Nazca Pampa," he said.

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"The creators of the orca drew it on the hillside in negative relief by removing a thin layer of stones to form the outline of the figure. This is similar to the technique used by the people of the Nazca culture to create geoglyphs from about 100 B.C. to A.D. 800.
But some contrasting parts of the rediscovered pattern, such as the eyes, were created out of piles of stones, the researchers said. This technique was used by people of the older Paracas culture, who occupied the region from around 800 B.C. to 200 B.C.
Soil tests have indicated that the orca geoglyph dates from around 200 B.C. The style of the pattern and its location on a hillside, rather than on a plain, suggest that it may be one of the oldest geoglyphs in the region, said one of Isla's colleagues, Markus Reindel of the German Archaeological Institute,"

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