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in creator/contributor: "Wilson, Ivan F."  
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Coal Deposits of the Santa Clara District Near Tonichi, Sonora, Mexico

Description: From abstract: The Santa Clara coal district is 7 to 10 kilometers west of Tonichi, a small town on the Rio Yaqui, in southeastern Sonora, Mexico. Tonichi was the terminus of a branch railroad from Corral until May 1945, when the end of the line was removed. The coal deposits were developed by the Southern Pacific Railroad from the 1890's until about 1911, when the mines were abandoned, partly because the coal was found unsuitable for use in locomotives. Other coal deposits, near Los Bronces an… more
Date: 1949
Creator: Wilson, Ivan F. & Rocha, Victor S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Manganese Deposits of the Talamantes District Near Parral, Chihuahua, Mexico

Description: From abstract: The Talamantes district, 20 kilometers east of Parral in southern Chihuahua, has been the second largest producer of manganese ore in Mexico. Production, which started during World War I and has been more or less continuous since 1930, has totaled about 50,000 tons of ore with an average manganese content of 40 or 41 percent. The mines are on the Mesa de Talamantes, which is underlain by folded Cretaceous (?) limestone, overlain unconformably by gently dipping Tertiary rhyolite f… more
Date: 1948
Creator: Wilson, Ivan F. & Rocha, Victor S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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