Palynological record of Bolling/Allerod Interstadial climatic changes in eastern France

High resolution palynological analyses (up to one sample about 45 years) of lacustrine and palustrine infillings from Jurassian and Subalpine areas un able to approach in great detail the dynamics of vegetation in late-glacial , specially during the "Bolling/Allerod" Interstadial (12,600 to 11,000 yea rs B.P.). These profiles show swift microfluctuations of the heliophilous herbaceous species, Poaceae, Betula and Pinus. These variations could be correlated wi th cold oscillations recorded in ice and marine cores i.e. the "Older Dryas ", the "Gerzensee oscillation" and an "intra Bolling oscillation".