Triassic strata with more than 10000 m in thickness are dominated by marine sed iments in northern Three_River area of eastern Tibet.

• 位于西藏东部的三江地区北部累计厚度达10000余米的三叠系以海相沉积为主，由碎屑岩、碳酸盐岩和火山岩的一种或两种占优势的组分构成。