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This is mainly due to reworking within gravity-deposited or current-affected sediments.When combined, the reliable age data allow an overall biostratigraphy and chronology to be erected.New age data from Sr isotope analysis and both planktonic foraminifera and nannofossils are presented and discussed here for the Upper Eocene–Upper Miocene sedimentary rocks of the Değirmenlik (Kythrea) Group.New dating is also given of some Cretaceous and Pliocene sediments.Among these “fingerprints”, isotopic ratios play an increasingly important role ().

Methods and results: An analytical protocol was optimized (chromatographic separation of Sr and Rb, followed by inductively coupled plasma-mass spectrometry (ICP-MS) analysis) for Sr ratios of soils from four vineyards located in three Portuguese DO (Dão, Óbidos and Palmela), established on distinct soil types, were determined.

The place of origin of foodstuff is regarded as value-added information and as a guarantee of quality and authenticity.

For wine in particular, geographical origin has a direct effect on its quality and commercial value, being one of the most studied products in terms of food authentication ().

studied the Sr isotopic composition in two wines from the Douro Portuguese Denomination of Origin (DO) by means of quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS) and compared it with the isotopic composition of the respective soil and grape juice.

It was shown that the Sr values in soil, grape and wine were statistically identical.

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