SUMMARYActive peat erosion is widespread in the Wicklow mountains, and it has been suggested that peat accumulation has slowed or ceased in the area associated with the erosive processes. Analysis of the recent deposition of pollen and magnetic minerals at three sites shows that significant quantities of peat (65 to 16-5 cm) have accumulated within the last 150 years. The fallout of magnetic pollutants is far below that found in the Pennine peats, ruling out certain hypotheses about the causes of montane blanket peat erosion.
S LI M MARY•^niall pollen grains and fine particles of the organic matrix in samples of a coarse detritus mud and a blanket peat '^'^Posit were removed by sieving through 30/mi polyester mesh after digestion with KOH and acetolysis during •'standard pollen pre-treatment. The technique enhanced the number of large pollen grains in the sample. 'Therê \as also an increase in the range of taxa which produce large grains. The method provided a means of estimatinĝ "^ ratio of any scarce large pollen ^rain to the total grain sum in samples prepared by standard methods of Pre-irt-atment.
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