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遗迹化石组合特征对确定湖盆岸带具有重要价值。吐哈盆地台北凹陷中侏罗统发现丰富的动、植物遗迹化石群落，通过对遗迹化石的分析研究，确定了台北凹陷中侏罗世湖岸带的变化为：西山窑组沉积中、晚期，南带（靠近觉罗塔格山一侧）的湖岸带西起胜金台、东到连木沁以北，北带（靠近博格达山一侧）的湖岸带基本在柯7井和柯6井偏北；三间房组沉积期，南带的湖岸带西起股金口胜101井，连木沁剖面正处于东侧岸带，北带湖岸带与西山窑组沉积期基本相同；七克台组沉积期湖水面积最大，南带湖岸带西起胜101井以南、东达连木沁以南，北带湖岸带继续北移。总体来看，从早到晚，湖水面积不断扩大，湖岸带后移，丘陵油田大多数井处于相对较深的浅湖区。图1参3（邹冬平摘）
The characteristics of the trace fossil assemblages are of great value in determining the lacustrine zone. In the Middle Jurassic of the Turpan-Hami Basin, Turpan-Hami basin, abundant fauna and flora of animals and plants were found. Based on the analysis of the fossil remains, the changes of the Middle Jurassic lakeshore in the Taibei Sag were confirmed as follows: The lakeshore belt (close to the Jueluotage Mountain) lakes west from Shengjintai, to the north of Linqinqin to the east, and the lakeside belt to the north (near Bogda Mountain side) Well in the north; the sedimentary period of the Sanfangang Formation is from the Shijinkou-Shengli-101 well to the west of the lacustrine zone of the southern belt, and the sedimentary period of the Ximuanyao formation in the north belt is basically the same; The area of Ketai Formation is the largest during the depositional period. The south lacustrine belt starts to the south of Sheng-101 well, to the south of Lintongqinqin, and to the north of the lakeshore belt continues to move northward. Overall, from morning to night, the lake area has been expanding and the lakeshore belt has moved backward. Most of the wells in the Hilly Oilfield are located in the relatively shallow shallow lake area. Figure 1 reference 3 (Zou Dongping pick)