Heituhu formation is gray and gray-black silty clay with limnological facies in early and middle period of Holocene, and bearing lots of spiral case;
黑土湖组为全新世早—中期湖沼相沉积的灰—灰黑色粘土类粉砂质粘土，含大量淡水螺蚌介壳；
2
The water level's raise of limnological region may be dangerous for bamboos' growing which also means that pandas who have bamboo as their food would be in danger.
湖区水位提高可能要危及竹子的生长。这意味着以竹子为食物的大熊猫也将受到威胁。
3
The method shown in this paper could be a new way to analyze the paleocurrent in paleo-limnological delta and will provide new scientific data to serve the petroleum exploration.