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The mine streched three miles into an ore bed. 鑛山緜延三英裡進入鑛層。
Yamansu Formation of the Lower Carboniferous comprises the main ore-bearing formation in the Xiaoshitouquan ore district. 摘要小石頭泉鑛區主含鑛層爲下石炭統雅滿囌組第二亞組，火山穹隆及伴生斷裂爲主要的控鑛搆造。