Radioactive dating in antartic

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Ice cores are a sample of layers of snow and ice that have collected over a period of a series of years that offers a continuous record of events and conditions.Falling snow captures the atmosphere through which it travels, collecting the chemistry, particles and compounds that are present - these include bits of dust, trace metals, or radioactivity.The image shown above is an example of seasonal and annual ice layering within an ice core.This 19 cm section of a Greenland ice core (GISP 2) was extracted from a depth of 1855 m.The coring is done so that the section of material sampled is not crushed or compressed, but ‘cut’ in a fairly intact manner, retaining original layering and positioning.

If each year the new snow amounts exceed any melt that occurs, layers of snow gradually accumulate compressing into ice.The model suggests that ice began to build in three sections of East Antarctica - Dronning Maud Land, the Gambertsev Mountains and the Transantarctic Mountains.After the model progresses for 300,000 years the ice sheet approximates present conditions, covering the majority of the continent, with the deepest and oldest section of ice still located over the Gamburtsev Mountains.By flying a series of long flight lines between Lake Vostok and the Gamburtsev Mountains we can connect the radar data from this missing interior area to Lake Vostok's existing data.This data will be available to assist China in selecting where to drill their ice core.

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