M.J. Pavich, USGS, Reston, VA

N. Vidic, University of Ljubljana, Ljubljana, Slovenia

Climate Change in Continental Isotopic Records Geophysical Monograph 78 (1993) 263-275

Correlation of glacial deposit is a key method in determinig the distribution ard synchroneity of terrestrial and marine responses to climate change. Many correlations of Quaternary deposits are, however, based on untested assumptions, or forcing of deposition ages into accepted chronologic framcworks. Improved dating methods for terrestial deposits that pre-date precise 14C dating are needed. Application of isotopic 10Be dating and palcomagnetic analyses to soils developed on glacio-fluvial terraccs has shown that the ages of terrestrial deposits can not be estimated solely by correlation to marine delta 18O record. The estimated ages of the four major glaciofluvial terraces in the upper Says River Valley in Slovenia do not correlate to the last four cold delta 18O stages. The oldest two terraces, mapped u Mindel and Gunz, are older than Brunhes/Matuyama boundary based on our preliminary data. Although precise ages can not be obtained by these methods, the age-ranges of soils on these deposits can be constrained.