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Another method of dating, is to date by the suspected species in the artwork, which only gives a wide range of possible dates.

Motifs of mammoths, lions or other extinct megafauna predates the Clovis period.

In many cases, even stratigraphical dating is impossible, due to disruptions of the stratigraphy which destroys the provenance from which a date could be established.

Also posing a difficulty, is the possibility that the time of an object’s creation and final deposit can vary greatly.

The age of a rock can be calculated if its ratio of uranium to lead is known.

This is unstable and eventually decays to lead, which is stable.

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Its crust is continually being created, modified, and destroyed.Name: Radiocarbon dating Material used: Organic remains such as wood and seeds Age range: Younger than 60,000 years ago How it works: Measures the amount of radioactive carbon-14 in the organic remains of living things Name: Fission track dating Material used: Volcanic glass, zircon and other crystals Age range: 10,000 to 500 million years ago How it works: Measures radioactivity by counting tracks left in crystals by decaying uranium atoms Name: Optically stimulated luminescence (OSL) Material used: Wind-blown sediment with lots of quartz or feldspar mineral grains Age range: Younger than 100,000 years ago How it works: Measures radiation that the mineral receives after it has been buried away from light Name: Fossil correlation Material used: Fossils Age range: All ages How it works: Fossils found in an undated rock are matched to similar fossils found in rocks that have been dated in other places Layer 1: Mudstone – sediments laid down in deep water.Fossils include the belemnite Belemnopsis aucklandica. Which dating method is best for rocks with fossils in?Due to the vast span of time, separating the creation of portable rock art and its subsequent analysis poses a great problem in dating the works.The typical method for dating ancient material, rardiocarbon dating, only works to date the rock, not the date of the art itself that was created.

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