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    STUDIA GEOLOGIA - Issue no. 1 / 2007  
         
  Article:   STABLE ISOTOPIC INVESTIGATIONS ON TRAVERTINES FROM THE GERECSE MOUNTAINS (HUNGARY).

Authors:  SÁNDOR KELE, ATTILA DEMÉNY, JÁNOS BORSODY. 		 
       
         
  Abstract:  The aim of this study was to collect stable carbon and oxygen isotopic signals from the most significant travertine occurrences of the Gerecse Mountains, to derive both paleohydrological and paleoclimatic information about the area from the Pliocene until nowadays. So far, more than 230 samples were investigated from ten quarries. During the Pliocene and the Quaternary, the area of the Gerecse Mountains was characterised by a strong hydrological activity. As a result, many local travertine deposits were formed on different terrace levels of the Danube River. The spring activity changed during the Pleistocene and the centre of the discharge moved to other parts of the Gerecse Mountains. In the Late Pliocene, the Western and Eastern Gerecse were the main discharge points of the karstic water. Later on, in the Early Pleistocene, the Central Gerecse became the centre of the travertine deposition, but in the Middle Pleistocene the springs dried up. In the Late Pleistocene and during the Holocenel, the spring activity stopped almost completely, except for the Western Gerecse (Scheuer and Schweitzer, 1988).  
         
     
         
         
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