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Oslo. ISSN 0300-9483. Combined investigations of isotopes, pollen, and molliisc shells were carried out on a Latc Glacial limnic high-resolution sediment sequence from the Geiseltal open-cast mine in Central Gcrmany. The dala confirm thc division of the Late Glacial biozones into two colder (Older and Younger Dryas) and two warmer periods (Bolling, Allcrcld), which have already bccn cstablishcd lor the Central and Northern German area. Radiocarbon data, mainly based on wood material, cover a time span between c, 10 800 BP and 12 760 BP, indicating a mean sedimentation rate of ('. 2 mm/yr. The stable isotope data (cj'KO, 6°C) reflect the transition periods between the climatic phases a s changes in relative air humidity (transition from dry, cold to warmer. more humid conditions). The dominance of evaporation effects, however, is superimposed on any ternpcratiirc aignal throughout the profile. Repeated conversions of the hydrologic regime (silting-up phases. lake-level variations) characterize the specific history of the lake development. Tu(junci Biitfgrr, Acliini Hillcr, U/Z-(ir?in~rl~/or.sc~l~~iiig.s~i~n/r~rt~i Leiprig-Htrllo GnihH, Sel,tion H~~ilro,~c~ologie. Arheifqyuppe Ptr/iio/i~rrlltrfo/lJgie. Pe 15, 0-04318 Leipsig, G C~I I L I I I J , ; Frank Wol/jpng Jirripe, Imtrtrrt /iir Geoplij>sik rind Gcologie, UnirtJr.\i , Td.ytr. 35. 0-04103 Ll,i!)~ig, G<,rniut/y: Tllotito.~ Litt. P~l i i o~~t o l -o~qi.sclrc,.s histirirt, Uniivr.sifii/ Bor7n. 8, 0-531 15 Bonn, Gcrr?itiii>~: Dic,tric.li Manitr. For.sclrrrtr~,s.stelli~ Bilsingsleheri, Frierlricli -Scliillcr -U i i i cr, Liihclcrgruhcn 24u, 0-07745 J c t z~i , Gerniuriy; :Yorhert Scli , AIfied-WeRerrer-lirstitirt fiir Polur-irnd Met~ri~.~for.cclrurr~, P.O. B(J.\-12 01 61, 0-27515 B~t,i~it,rli~ri,~,tr. G c r m r i t j~: ri'cc~iwrl 14th Jiorc. 1996. ircwjifcrl I2tlr Miirc~lr 1998.

From 1998 to 2002 investigations were carried out to estimate both the quantity and quality (heavy metal contents) of suspended matter loads discharged into a floodplain area measuring approx. 5 km 2 of the Central German river Weiße Elster, a tributary of the river Saale in the Elbe river basin. Flood sediments, suspended particulate matter, and floodplain soils were investigated especially for the main pollutants Cd, Zn, Cu, Pb, Cr, and Hg. Supplementary gamma spectroscopy examinations were performed to help to identify the age of deposits in order to estimate sedimentation rates for last decades. The recent flood sediments are contaminated by up to 33 times the geogenic background (Cd). Up to 55% of the total annual SPM load of the river Weiße Elster is relocated into the investigated retention area in the flood-stricken year 2002. The sedimentation rates for the last 50 years vary between 0.5 mm/a and 1 mm/a in far away and rarely flooded parts and between 1 mm/a and 2 mm/a in the frequently flooded parts of the inflow of the retention area.

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