THE STRATIGRAPHY AND POLLEN ANALYSIS OF LAKE DEPOSITS NEAR TADGASTER, YORKSHIRE

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Abstract
Summary: The stratigraphy and pollen analysis of the deposits show that this is a lake basin which during the Late‐glacial period was partially filled by lake clays and muds. One of the main interests of the pollen diagrams lies in the division of zone I into three sub‐zones showing a minor climatic oscillation which seems to be comparable with the Bölling oscillation of northern Europe. During Post‐glacial time the greater part of the deposits has been muds but on one side a fen developed which in early zone VI was sufficiently dry to support birch and pine wood. Later in zone VI the water table must have risen slightly because the fen peats were gradually covered by a rather oxidized mud suggesting that the fen became replaced by a shallow swamp with a widely fluctuating water table. In the Atlantic period the basin was reflooded and the more central deposits were covered by a layer of mud. Later in the central region, swamp and eventually Sphagnum bog communities developed. The whole area is now covered by a silty soil and forms a flat meadowland.

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