It is not always possible to recognize re-use. Other materials can present the same problem: A separate issue, related to re-use, is that of lengthy use, or delayed deposition. For example, a wooden object that remains in use for a lengthy period will have an apparent age greater than the actual age of the context in which it is deposited.
The Pleistocene is a geological epoch that began about 2. The Holocenethe current geological epoch, begins about 11, years ago, when the Pleistocene ends.
Before the advent of radiocarbon dating, the fossilized trees had been dated by correlating sequences of annually deposited layers of sediment at Two Creeks with sequences in Scandinavia. This led to estimates that the trees were between 24, and 19, years old,  and hence this was taken to be the date of the last advance of the Wisconsin glaciation before its final retreat marked the end of the Pleistocene in North America.
This result was uncalibrated, as the need for calibration of radiocarbon ages was not yet understood. Further results over the dating north somerset decade supported an average date of 11, BP, with the results thought to be most accurate averaging 11, BP. There was initial resistance to these results on the part of Ernst Antevsthe palaeobotanist who had worked on the Scandinavian varve series, but his objections were eventually discounted by other geologists.
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Couples are usually wedded through either an arranged marriage or love marriage. Love marriages are those in which the individuals have chosen a partner whom they like by their own choice prior to marriage, and usually occur with the consent of parents and family. Arranged marriages on the other hand are marriages which are set and agreed by the families or guardians of the two individuals where the couple may not have met before.
In either cases and in consistency with traditional marital practices, individuals who marry are persuaded to meet and talk to each other for some time before considering marrying so that they can check their compatibility. The original SDU, which controversially promoted marriages among university graduate singles, no longer exists today.