engleski

Geochronology

In order to determine the age of tufa deposits, about 500 samples of tufa from active barriers and old deposits from the entire area of the National Park were collected by collaborators of the Ruđer Bošković Institute. Outcrops of old tufa deposits found at three locations in the Park area were dated by 230Th/234U dating method (Srdoč et al., 1994, Horvatinčić et al., 2000). These results showed that most of old tufa samples clustered around interglacial marine 18O stage 5, and then interglacial stages 7 and 9. 14C and 230Th/234U ages of tufa in the Plitvice Lakes area demonstrate that the formation of tufa barriers was stimulated by changing climate, e.g. during interglacial periods with warm and humid conditions. Results of 14C dating of active tufa deposits show that they are younger than 8000 years BP (Before Present) and formed during the Holocene period, i.e. after the last deglaciation.

Plitvice Lakes, karst, project STRAVAL, geochronology, 14C, U/Th

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