New Evidence for a Cretaceous Age for a Mesozoic Nonmarine Bivalve Assemblage from Paekto-dong, Sinuiju City, The Democratic People’s Republic of Korea  

作　　者：CholGuk WON KwangSik SO SuHyang JON 

机构地区：[1]Department of Paleontology, Faculty of Geology, Kim Il Sung University

出　　处：《Acta Geologica Sinica(English Edition)》2019年第6期1607-1613,共7页地质学报（英文版）

摘　　要：The Sinuiju Formation in Paekto-dong,Sinuiju City in the Democratic People's Republic of Korea has yielded Mesozoic nonmarine bivalve fossils,which is the first occurrence of such in the DPRK.Based on these fossil specimens,a new Cretaceous bivalve assemblage,the Arguniella yanshanensis-Sphaerium anderssoni Assemblage is erected.This assemblage includes Arguniella yanshanensis,A.lingyuanensis and Sphaerium anderssoni and can be compared with the Jehol Biota.The age of the Sinuiju Formation is also clarified and on the basis of the bivalves and the presence of a Eosestheria–Ephemeropsis–Lycoptera(E–E–L)assemblage,the formation is not Upper Jurassic,but Lower Cretaceous in age.The Sinuiju Formation in Paekto-dong, Sinuiju City in the Democratic People’s Republic of Korea has yielded Mesozoic nonmarine bivalve fossils, which is the first occurrence of such in the DPRK. Based on these fossil specimens, a new Cretaceous bivalve assemblage, the Arguniella yanshanensis-Sphaerium anderssoni Assemblage is erected. This assemblage includes Arguniella yanshanensis, A. lingyuanensis and Sphaerium anderssoni and can be compared with the Jehol Biota. The age of the Sinuiju Formation is also clarified and on the basis of the bivalves and the presence of a Eosestheria-Ephemeropsis-Lycoptera(E-E-L) assemblage, the formation is not Upper Jurassic, but Lower Cretaceous in age.

关 键 词：BIOSTRATIGRAPHY nonmarine bivalves Sinuiju Formation Early Cretaceous DPRK 

分 类 号：P53[天文地球—古生物学与地层学]