Palynological assemblages from the holocene sediments of the Changjiang (Yangtze) River Delta and its implications

The palynological study on the Quaternary sediments of 42 cores in the region of the Yangtze River Delta and the sections of 4 relics had been done since 1960. Palynological assemblages from the region of the Yangtze River Delta, showing obviously common characteristics but with slight differences because of the vast areas covered can be divided into five spores and pollen zones and three subzones in ascendant order:

I.

Quercus alienc-Pinus-Cupressaceae—Chenopodiaceae spores and pollen zone reflecting the cool, then cold and dry climate—Preboreal.