pl23_ship3195.jpg
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The Aleutian Trench compiled by Harold W. Murray of the Coast and Geodetic Survey and published in the Bulletin of the Geological Society of America, Vol. 56, p. 757-782, Plate I. Soundings for making these profiles wereacquired between 1925 and 1939 by following systematic tracklines from the U. S.West Coast to the Aleutians for hydrographic surveying operations.