In this period, both at the lake and the east steepshore, it deposited thick dark shale deposition, as the first set of source rocks depression of the depression.
在这个时期，湖盆内部和东部陡岸，沉积了厚度较大的湖相暗色泥岩沉积，成为本凹陷的第一套烃源岩层。
2
Small landslides constantly add to the steep rubble slopes along the lake's shore, and large boulders periodically drop into the lake.