广西第三系层序

TERTIARY BED SEQUENCE IN GUANGXI AUTONOMOUS REGION

广西的第三系以百色和合浦盆地为代表,依据岩性、沉积旋回和古生物等特征将下第三系划分为七个组:上洋组、六吜组、洞均组。那读组、百岗组、伏平组、建都岭组;上第三系划分为两个组:沙岗组、长蛇岭组。各组建立了相应的古生物化石组合。

Based on a study of Baise Bose and Hepu Basin Tertiary bed sequence in Guangxi Au- tonomous Region is established with lithology, sedimentary Cyeles, and biota as criterion. The Lower Tertiary is subdivided into seven formations, (1) The Shangyang formation, with 3 fossil assemblage, 1 Ostracota, 1 Charophyta and l Sporepollen, (2) The Luniu formation, (3) The Dongjun formation, with l Mammalian fossil assemblage, (4) The Nadu formation, with ll fossile assemblages, 2 Ostracoda, 2 Gastropods, l Bivalvia, lVertebrate, l flora, and 4 Sporepollen, (5) The Baigang formation, with 4 fossile assem-blage, l Ostracoda, l Gastropods, l Bivalvia, and l Sporepollen, (6) The Fuping formation, with 3 fossile assemblage, l Bivalvia, l Vertebrate, and l Sporepollen, (7) The Jianduling formation, with 2 fossile assemblage, l Bivalvia, and l Sporepollen, The Upper Tertiary is subdivided into two formations, (1) The Shagang formation, and (2) The Chang-Sheling formation。with l Sporepollen fossile assemblage。