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Pollen analysis was done on a core through a linear mound formerly identified as a 1777 British. ea:thwork at Saratoga National Historical Park. Documents indicate that the British earthwork was butlt m a forest in a sparsely settled region. Pollen data record a 71-year reforestation sequence under the mound, indicating that it cannot be a Revolutionary War earthwork. II a ete fait analyse du pollen d'une carotte provenant d'un remblai lineaire precedemment identifie comme un ouvrage de terre bn'tannique de 1777 au pare historique national de Saratoga. D'apres les. documents /' ouvrage Jut construit dans une foret situee dans une region peu colonisee. Les donnees re/atzves au pollen' relevent un reboisement de 71 ans sous le remblai, ce qui indique qu'il ne peut s'agir d'un ouvrage de terre de Ia guerre revolutionnaire.

Pollen deposited on the ground surface is carried down into the soil by percolating groundwater. Such postdepositional pollen transport preserves the record of historical vegetation and land use in slowly or nonaggrading sediment profiles by separating the pollen spectra of successive ground covers. This is demonstrated at Great Meadows, Pennsylvania, where pollen spectra in hillside cores indicating a preagricultural-era forest are succeeded during the clearance and agricultural period by weed and cereal pollen during the nineteenth and early twentieth centuries. These are, in turn, replaced by grass during the park period of the last 65 years. The preagricultural pollen spectra indicate that differences in historical ground cover across relatively short horizontal distances and elevations can be reconstructed with pollen analysis.