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我队在遵义一个铝土矿区外围普查时,在下石炭统(?)含铝岩系的底部、下奥陶统风化侵蚀面上发现一层含磷岩石.
Our team found a layer of phosphorus-bearing rocks at the bottom of the Lower Carboniferous (?) Al-bearing rock system and on the weathered and undercutted Lower Ordovician at the census of a bauxite area in Zunyi.