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Lushan is located southwest of Chengdu in Sichuan Province, China. It is an area of conglomerate limestone which is extensively karstified with a large number of sinkholes and closed depressions. The local landscape is dominated by the Weita Depresssion in which a number of small surface streams sink in caves which have not been explored but are presumed to drain to the west. Immediately to the east of Weita, the well-developed Long Men Dong system carries 3 streams, all of which drain to the east. A band of gritstone appears to seperate the two catchment areas. There is good potential for futher exploration, both in Long Men Dong and Weita.