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Columbite-Tantalite from Tin Mountain Mine, Fourmile , References: Rocks & Minerals: 60: 117-118; Meeves, H, et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur Mines Info ....
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Mining and Quarrying Statistics Prior to the discovery of petroleum, Nigeria was impressively sustained by agriculture and few solid minerals known at the time, namely coal, tin, columbite and gold...
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