pollen diagram

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pollen diagram A standardized pictorial summary of the pollen record for a particular location; the vertical axis represents depth below ground-surface level and the proportions or absolute amounts of the various pollen types occurring at different levels are shown by bar histograms or by points on a continuous curve. Conventionally, similar patterns are grouped together on the diagram, with arboreal types shown first, followed in turn by shrubs, herbs, and spores.

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