广西南宁盆地的脊椎动物化石及下第三系

<正> 南宁盆地脊椎动物化石地点目前所知不下七处。本文着重记述了1974和1979年笔者采自邕宁县五塘公社莲塘村的石炭兽化石,并对盆地东部下第三系作一初步划分。本文首次报道南宁盆地发现脊椎动物化石,对研究石炭兽的演化、发展和分布,对盆地第三系地层的划分和对比,提供了新的依据。一、化石地点及地层概况莲塘村位于南宁市东北约32公里、五塘圩东5公里、邕宾(南宁—宾阳)公路南侧。石炭兽化石产于莲塘村东约300米远的小煤窑、距地表8.3米深的褐煤层顶板(灰色泥质粉砂岩)中。

THE VERTEBRATE FOSSILS AND LOWER TERTIARY FROM NANNING BASIN,GUANGXI

The described Oligocene vertebrate fossils were collected in lake and swamp deposits of the Nanning Basin.The Lower Tertiary is subdivided into three formations.1. The Red Stone Formation: This Formation is 100-220 meters in thickness. It is considered early to middle Eocene in age.2. The Naduo Formation: That the lake and swamp deposits contain lignite. This Formation is 143-228 meters in thickness. It is considered late Eocene in age.3. The Yongning Formation: This Formation consists of three members.The lower member: That the swamp deposits contain lignite. This member is 191 meters in thickness. It is considered early Oligocene in age. The species of fossils includes: Heothema nanningensis sp. nov. Crocodilus sp.The middle member: That the lake deposits. This member is 188 meters in thickness. It is considered Oligocene in age.The upper member: That the swamp deposits contain lignite. This member is >264 meters in thickness. It is considered Oligocene in age. The species of fossils includes: Crocodilus sp. Pseudobagrus sp. Emydidae gen. et sp. indet.