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This has since progressed to an on-the-ground excavation by a team led by Grigoriev.They've found that the stone architecture of the geoglyph is quite elaborate.Most of them are pickaxe-like tools called mattocks, useful for digging and chopping."Perhaps they were used to extract clay," he writes in the email.A megalithic culture Researchers say this geoglyph may have been built by a "megalithic culture" in the region that created stone monuments in prehistoric times."[M]any megalithic sites with features in common with European megaliths have been located: Some 300 are known but have not yet been studied in detail," write Grigoriev and Menshenin in the Antiquity article.Among these megaliths are numerous "menhirs," large upright standing stones.A historical Google Earth satellite image from 2007 shows what may be a tail, but this is less clear in more recent imagery.
Some wall paintings are painted on large canvases, which are then attached to the wall (e.g., with marouflage), but the technique has been in common use since the late 19th century.
The style of stone-working called lithic chipping used on one artifact dates it to the Neolithic and Eneolithic (sixth to third millennia B.
C.), though Grigoriev says the technology is more typical of the Eneolithic, between the fourth and third millennia B. If that date is correct, it would make the geoglyph far older than Peru's Nazca Lines, the very earliest of which were created around 500 B. Grigorievadded that current studies of ancient pollen at the site will help to narrow down the age.
He cautioned that his team didn't excavate all the way down to the bottom of the walls, not wishing to damage the geoglyph.
Dating the geoglyph Among the finds from the excavations are about 40 stone tools, made of quartzite, found on the structure's surface.
Murals of sorts date to Upper Paleolithic times such as the cave paintings in the Lubang Jeriji Saléh cave in Borneo (40,000-52,000 BP), Chauvet Cave in Ardèche department of southern France (around 32,000 BP).