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Small flakes of exfoliated, blue paint were found at the site.
Optical microscopic examination determined the microstratigraphy of the samples and that the flakes were free of modern contamination.
Two small, well conserved tabular sandstone masonry structures of Puebloan origin are in the alcove.
A small storage structure may have been present, as well as an artificial floor below the pictograph. Archaeological evidence, particularly ceramics, indicates a late Pueblo II-Pueblo III site.
Dr Pike said: "We see evidence for earlier human symbolism in the form of perforated beads, engraved egg shells and pigments in Africa 70-100,000 years ago, but it appears that the earliest cave paintings are in Europe.
One argument for its development here is that competition for resources with Neanderthals provoked increased cultural innovation from the earliest groups of modern humans in order to survive.
According to Oppenheimer, modern humans first began arriving in Australia from islands across the Timor Sea during the Middle Paleolithic era, between 70,000 and 60,000 BCE.
Evidence of the ancient art (if any) of this first wave of aboriginal settlers is extremely scarce, but there are signs of pigment usage which suggest that they began painting almost immediately, although this might have been face or body painting rather than rock painting.
Introduction Types Characteristics Dating History/Chronology Ubirr Rock Art (Northern Australia) Burrup Peninsula Rock Art (Western Australia) Bradshaw Rock Paintings (Western Australia) Sydney Rock Engravings (NSW) Collections Hand Stencil Painting. Handprints and cupules are believed to constitute the oldest forms of aboriginal parietal art in Australia, dating perhaps to 40,000 BCE.
However, this remains unconfirmed by carbon-dating results.
Dr Pike said: "Evidence for modern humans in Northern Spain dates back to 41,500 years ago, and before them were Neanderthals.Tags: Adult Dating, affair dating, sex dating