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羌塘盆地北部自然条件恶劣 ,地层研究难度极大 ,层位的划分和时代归属仍存在争议 .以测制的羌塘盆地北部东湖剖面为依据 ,对上侏罗统进行了详细的岩石及生物地层研究 ,将其划分为两部分 ,下部灰岩层为索瓦组 ,含Radulopectenfi brosus-Gervillellaaviculoides组合 ,时限为牛津期 ;上部灰岩、碎屑岩互层为白龙冰河组 ,含Radulopectenscarburgensis,Euprionoc erassp .等化石 ,其主体时限为基末里期—提唐期 ,顶部已跨入早白垩世白里阿斯期 .
The northern Qiangtang Basin has poor natural conditions and extremely difficult stratigraphic studies, and the division of strata and the ownership of the time are still in dispute.According to the measured East Lake section in the northern Qiangtang Basin, Stratigraphic study, which is divided into two parts, the lower limestone layer is the Suowa group, containing Radulopectenfi brosus-Gervillellaaviculoides combination, the duration of the Oxford period; upper limestone, clastic interbedded white Long Binghe group, containing Radulopectenscarburgensis, Euprionoc erassp The fossils, the main body of the time limit for the base period - mention Tang period, the top has entered the Early Cretaceous Bairuas period.