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This paper is based on field work done during the month of September, 1909, by W. R. Calvert and the writer, assisted by J. R. Hoa.^ Its objects are to give information regarding the coal resources of the Hound Creek district of the Great Falls coal field and to describe the geologic formations and the structure relating to the occurrence or absence of the coal-bearing rocks. As the work was done primarily

Contributions to economic geology, 1916, Part II, Mineral fuels--Geology of the Hound Creek district of the Great Falls coal field, Cascade County, Montana