Abstract：The study area is located in Risong villages of Tibet. In order to provide the basis for Mesozoic stratigraphic age in this area, lithology combination, sedimentary environment, paleontological characteristics were studied. A lot of Early Cretaceous index fossils, such as Orbitolina (Palorbitolina)complanata and Stylina parvistella Volz, were found in the Jurassic strata in the 1:250 000 geological survey in Ritu County. These fossils provided strong evidence of the division of stratigraphic age in this area. Combining with analysis of sedimentary environment, the conclusion can be made that sedimentary facies in early Cretaceous of this area developed in residual sea basins.
陈美涛, 范国强, 贾笛, 潘映星, 康枭. 西藏日松乡一带发现早白垩世标准化石及其意义[J]. 中国地质调查, 2016, 3(6): 32-36.
CHEN Meitao, FAN Guoqiang, JIA Di, PAN Yingxing, KANG Xiao. Significance of Early Cretaceous index fossils from Risong villages of Tibet. , 2016, 3(6): 32-36.
2016, Vol. 3 
