PERMIAN RADIOLARIANS FROM THE SO-CALLED GUFENG FORMATION OF THE LAIBIN - LIUZHOU AREA, GUANGXI, CHINA

Abstract

Middle - Late Permian radiolarians were found from siliceous rocks of the so-called Gufeng Formation of the Laibin - Liuzhou area, Guangxi, China. The radiolarian assemblages from the formation of the study sections could be assigned to those of the Pseudoalbaillella globosa, Follicucullus scholasticus, and Follicucullus charveti-Albaillella yamakitai zones of Southwest Japan. The radiolarian ages of the formation range from Middle Permian to early Late Permian. The siliceous rocks of the so-called Gufeng Formation directly cover the limestones of the Qixia Formation and the Maokou Formation, and are covered by the limestones of the Heshan Formation. The radiolarian ages of the basal part of the so-called Gufeng Formation are different among the sections within the Laibin - Liuzhou area. This difference may indicate the varied paleogeographic settings within the narrow sedimentary basin in the central Guangxi area during Middle to early Late Permian age.