Ivy, Mistletoe and Elm Climate Indicators - Fodder Plants. A Contribution to The Interpretation of the Pollen Zone Border VII-VIII

J Troels-Smith
1960 Danmarks Geologiske Undersøgelse IV. Række  
Knud Jessen (1935) fixed the border between his pollen zones VII-VIII which, broadly speaking, separates the Atlantic period from the Sub-Boreal period in Danish pollen diagrams, at the level "where the curve for the Oak Mixed Forest bends inwards, often because the frequency of the linden especially drops quickly".
doi:10.34194/raekke4.v4.7000 fatcat:ynqnpimyx5hn7jbteqrbquwucy