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Relative dating the rocks

relative dating the rocks-16

Geoglyphs are drawings on the ground, or a large motif, (generally greater than 4 metres) or design produced on the ground, either by arranging clasts (stones, stone fragments, gravel or earth) to create a positive geoglyph or by removing patinated clasts to expose unpatinated ground.Some of the most famous negative geoglyphs are the Nazca Lines in Peru.

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It is widely believed that the paintings are the work of respected elders or shamans.Other areas with geoglyphs include Western Australia and parts of the Great Basin Desert in SW United States.Hill figures, turf mazes and the stone-lined labyrinths of Scandinavia, Iceland, Lappland and the former Soviet Union are types of geoglyph.Cave art may have begun in the Aurignacian period (Hohle Fels, Germany), but reached its apogee in the late Magdalenian (Lascaux, France).The paintings were drawn with red and yellow ochre, hematite, manganese oxide and charcoal.Explanations for this similarity are mostly grounded in Jungian psychology and the views of Mircea Eliade.

According to these theories it is possible that the similarity of petroglyphs (and other atavistic or archetypal symbols) from different cultures and continents is a result of the genetically inherited structure of the human brain.

Petroglyphs Petroglyphs are images incised in rock, usually by prehistoric, especially Neolithic, peoples.

They were an important form of pre-writing symbols, used in communication from approximately 10,000 B. to modern times, depending on culture and location.

Sometimes the silhouette of the animal was incised in the rock first. Abb Breuil interpreted the paintings as being hunting magic, meant to increase the number of animals.

As there are some clay sculptures that seem to have been the targets of spears, this may partly be true, but does not explain the pictures of beasts of prey such as the lion or the bear.

Other theories suggest that petroglyphs were made by shamans in an altered state of consciousness, perhaps induced by the use of natural hallucinogens.