������Ϫ�������������а�������ҹ���(O₂m)�������У���Ҫ�ܽ�SN��NE���ѿ��ƣ��ؽ�SN���ѷ����߶Ȳ�ͬ��4�㶴Ѩ�����ڳ������Ի�ѧ����Ϊ������е�������١�ͨ���ⶨ��������¶ȡ�ʪ�ȼ�CO₂�������Ա��о����ֶ�Ѩ����ԽϺã���������ѭ���ϲ���붴��ɺӺ����׵صĸ̼߳��γ�ʱ���ϵĶԱ��о������ϣ����������������������ϵ������(111.5±5.3 ka)�������ƶϾ������������������������

The Jinghua Caves are exposed in thick limestone of Middle Ordovician Majiagou Formation in Benxi of Liaoning��which controlled mainly by near SN and NE faults��and compose of four-layer caves with different levels along near SN fault��The sediments in the caves are dominated by chemical deposition with scarce me- chanic~deposition��By measuring the temperature��humidity and CO₂ contents inside and outside the caves��the analysis shows that the closeness of the caves is good and the air circulation with the outside is poor��Based on the comparative study of elevation and formation age with the terrace of Ganhe��the authors estimate that the main cave of Jinghua Caves originated in Late Pleistocene combined with the U—dating of the samples(111.5±5.3 ka).