Relief shown by form lines and spot heights. "Twentieth annual report; pt. 7, map no. 20." Lith. by A. Hoen & Co., Baltimore, MD. "Topography by Emil Mahlo, Lieutenant P. G. Lowe, U.S.A., and F. C. Schrader, U.S. Geological Survey."...
Relief shown by contours and spot heights. Edition of January 1898. Pg. 276. Printed by The Canada Eng. & Litho. Co. Ltd. Montreal. Includes notes on the geology of the rivers. In color. Mounted on linen.
Relief shown by contours and spot heights. From Alfred H. Brooks, The geography and geology of Alaska : a summary of existing knowledge (professional paper) Inset: [Aleutian Islands]. Ancillary map: [Alaska survey index]. "Professional Paper No....
Relief shown by contours. "Topography by R. H. Sargent and C. G. Anderson." "Geology by J. B. Mertie, Jr., G. L. Harrington, A. G. Madden, H. M. Eakin, P. S. Smith, and J. E. Spurr." "Surveyed in 1898, 1908, 1912, 1914, 1915, and 1917." ...
Relief shown by contours. "Topography by C. E. Griffin, R. H. Sargent, H. M. Eakin, and C. G. Anderson." "Surveyed in 1910, 1913, and 1915." "U.S. Geological Survey Bulletin 754, Plate III." In color, 68 x 57 cm.
Shows regions surrounding headwaters of Gakona, Chistochina and Slana Rivers, Alaska. Includes legend. Relief shown by contours. Bulletin 498, Plate III. Color; 37 x 28 cm.
Published in [Washington, D.C.] by Geological Survey (U.S.) in...
Includes notes on geology. Relief shown by contours and spot heights. Includes two section maps. No. 767, preliminary edition. Annotated on verso. In color.
Published in [Ottawa] by the Geological Survey of Canada in 1902. Scale...
Includes notes on geology and seal populations. Relief shown by shading and hachures. "Surveyed & drawn July 1872, by Henry W. Elliott." Manuscript map; hand colored.
Shows geological ages of formations and deposits. Includes legend. "Geological outlines,those of map published by Department of Interior, 1904." "Geology from results of various expeditions. Letters denote where fossil remains have been found in...
Shows locations of rock types and mines. Includes legend. Relief shown by form lines. "Geology by P.S. Smith, H.M. Eakin and A.G. Maddren." "Surveyed in 1909." "Bulletin 449, Pl. V."
Published in [Washington, D.C.] by the Geological...
Relief shown by contours and spot heights. Surveyed in 1905 and 1906. Includes 8 geologic sections, area map, chart of analyses and testing, and legend. Map is 93 x 88 cm.
Title from verso. Photograph of a volcano erupting. Verso reads: "Umnak -- Shooting hot volcanic ash bombs high into the air, a long-dormant crater nearby Mount Tulik gave soldiers at this Aleutian base some anxious moments this summer. ...
(4:40 min) (12 of 17) Flying for DGGS pt.1
As a pilot for Division of Geology and Geodetic Surveys had emergency call to fly in whiteout conditions to get a badly burned man at another station. Flying under 200 ft. elevation so not to miss...
(4:16 min) (13 of 17) Flying for DGGS pt. 2
As a pilot for Division of Geology and Geodetic Surveys had emergency call to fly in whiteout conditions to get a badly burned man at another station. Flying under 200 ft. elevation so not to miss...