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There is now convincing evidence that many glacial, fluvial, aeolian, and even shallow marine sediments can be dated by OSL techniques.The upper limit of age by OSL is largely determined by the annual dose on the sediment which is related to it's content of uranium, thorium and potassium.Careful selection and preparation of material by experienced Strata Data staff is key to the success of this technique.This is matched by world class analysis at one of a number of laboratories.A stop watch may time your race with a precision of one hundredth of a second.

The assumption that the Sr ratio of the world’s oceans has fluctuated uniformly through time has enabled a Global Standard Strontium Curve (GSSC) to be established (Howarth and Mc Arthur, 1997).

Converting the results of analyses to numerical ages is achieved using a unique Global Strontium Seawater Curve.

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