Description: "Production of coal in the United States in 1918 and outlines [in red] of coal fields... Size of block is proportional to percentage of total production of the United States in 1918; percentage indicated also by figures... Approximate outlines of coal fields other than lignite. Most important producing districts shaded." — Department of the Interior, 1921
Place Names: Minerals, Boston, Chicago, Houston, Los Angeles, New Orleans, New York, San Diego, Seattle, Washington D.C., Tallahassee, St. Augustine, coa
ISO Topic Categories: boundaries,
economy
Keywords: Production of Coal in the United States, physical, political, statistical, kResources, physical features,
geological, country borders,
major political subdivisions, industry,
economic, boundaries,
economy, Unknown, 1918
Source: Department of the Interior , World Atlas of Commercial Geology (Washington, DC: Department of the Interior , 1921) Plate 8
Map Credit: Courtesy the private collection of Roy Winkelman |
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