宁波平原位于浙江省东北部,三面环山,北部临海,西、西南部山区为四明山东麓的低山丘陵,海拔400米以下,东南部系天台山东北余脉,一般高度300米以下。平原面积约850平方公里,平原河网密集,地势低平,平均高程2～3米,为海积平原。
The spores and pollen fossils from the Quaternary sediments of Ningbo Plane which lies the northeast of Zhejiang Province,can be divided into 8 spores and pollen zones,in ascendant order: 1.Cupressaceae-Pinus-Quercus dentata-Concentricystes spores and pollen zone. 2.Quercus acutissima-Cyclobalanopsis-Ulmus-Chenopodium spores and pollen zone. 3.Cupressaceae-Pinus-Gramineae spores and pollen zone. 4.Quercus dentata-Quercus aleina-Cupressaceae-Pinus-Chenopodiaceae spores and pollen zone. 5.Quercus acutissima-Quercus aleina-Pinus-Cyclobalanopsis spores andpollen zone. 6.Cyclobalanopsis-Castanopsis-Myrica-Chenopodiaceae spores and pollen zone. 7.Castanea-Quercus acutissima-Cupressaceae Gramineae spores and pollen zone. 8.Quercus acutissima-Castanea-Cyclobalanopsis-Sparganiaceae spores and pollen zone. The climate change phases of Ningbo Plane reflected by these spores and pollen zones since Late pleistocene are as follow: Cold and moist-Warm and humid-cold and dry-cool and a little dry-temperate and cool-hot and moist-temperate and a little dry-warm aud humid. 1—3 spores and pollen zones are thought of as Late pleistocene and 4—8 spores and pollen zones as Holocene.
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