摘要
淮河、长江下游广大地区地势平坦 ,河、湖、港发育 ,第四纪地层出露良好 ,可分为平原区、丘陵区二种类型。第四纪时 ,本地区气温适宜 ,雨量充足 ,河湖密布 ,沼泽宽阔 ,优越的生态环境适合软体动物生存和繁衍 ,因此软体动物属种数量繁多 ,分布广泛。在淮河及其两岸丽蚌 (L amprotula)、矛蚌 (L anceolaria)、曲蚌 (Arconaia)很昌盛 ,长江下游南岸金坛、宜兴蚬科 (Corbiculidae)化石堆积厚可达 1m以上。
There are many rivers, lakes and loughs in the Huaihe Vellays and Lower Yangtze area, and where Quaternary strata are well developed and exposed. These strata may be divided into two types, the plain and the hillock, based on the geomorphological and sedimental features and molluscs. In Quaternary, the high diversity and wide distribution of the molluscs are due to the suitable environment in the Huaihe Vellays and Lower Yangtze area. Bivalves Lamprotula, Lanceolaria and Arconaia are very flourishing on the banks of the Huaihe River. The thickness of the fossiliferous layer containing Corbiculidae (Bivalvia) is more than 1m in Jintan and Yixing Counties on the south bank of the Yangtze River.
出处
《地层学杂志》
CSCD
北大核心
2002年第4期253-258,共6页
Journal of Stratigraphy
基金
国家自然科学基金 (No.40 0 73 0 3 0 )资助
