Geological map of the United States and part of Canada / compiled by C.H. Hitchcock for the American Institute of Mining Engineers to illustrate the schemes of coloration and nomenclature recommended by the International Geological Congress.
Compiled under the direction of Henry Gannett, E. M."; "Based by permission of the Director of the U.S. Geological Survey, upon the map published in his Fifth Annual Report ... For further explanations, see Prof. Hitchcock's paper on "The geological map of the United States", in the Transactions of the Institute."; 1 map : col., mounted on cloth 43 x 70 c
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