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Rates of change at Kråkenes Lake, Norway, over 25-calendar-yr intervals for the fossil groups and percentage loss-on-ignition at 550°C. The approximate 95% significance levels for the rates of change estimates based on permutation tests are shown by the vertical broken lines. Rates of change greater than these are unlikely to have arisen by chance (see ref. 6). Vegetation changes are indicated at the right side of the diagram. Redrawn from ref. 6. L. unit, lithological unit.
