...石炭系黄龙组；古岩溶；稀土元素 [gap=1633]Key words: geochemistry; eastern Sichuan-northern Chongqing area; Huanglong formation of carboniferous; paleokarst; rare earth elements ..
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The Huanglong, Chuanshan formation of Upper Carboniferous and the Qixia, Dingjiashan formation of Lower Permian, outcropping in Tonglu-Lengwu, have a total thickness of 932.3 meters.
出露于桐庐冷坞的上石炭统黄龙组、船山组和下二叠统栖霞组、丁家山组，总厚932.3米。
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