Some Effects of Recent Volcanic Ash Falls With Especial Reference to Alaska
By RAY E. WILCOX INVESTIGATIONS OF ALASKAN VOLCANOES
GEOLOGICAL SURVEY BULLETIN 1028-N
Prepared in cooperation with the Office, Chief of Engineers, U.S. Army
UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1959 UNITED STATES DEPARTMENT OF THE INTERIOR
FRED A. SEATON, Secretary
GEOLOGICAL SURVEY
Thomas B. Nolan, Director
For sale by the Superintendent of Documents, U. S. Government Printing Office Washington 25, D. C. Price 30 cents (paper cover) PREFACE In October 1945, the War Department (now Department of the Army) requested the Geological Survey to undertake a program of volcano investigations in the Aleutian Islands and Alaska Penin sula area. The first field studies were made during the years 1946-48. The results of the first year's field, laboratory, and library work were hastily assembled as two administrative re ports, and most of these data have been revised for publication in Geological Survey Bulletin 1028. Part of the early work was published in 1950 in Bulletin 974-B, "Volcanic Activity in the Aleutian Arc," and in 1951 in Bulletin 989-A, "Geology of Buldir Island, Aleutian Islands, Alaska," both by Robert R. Coats. Addi tional fieldwork was done during the years 1949-54. Unpublished results of the early work and all the later studies are being in corporated as parts of Bulletin 1028. The investigations of 1946 were supported almost entirely by the Office, Chief of Engineers, U.S. Army. From 1947-55 the Departments of the Army, Navy, and Air Force joined to furnish financial and logistic assistance. The Geological Survey is indebted to the Office, Chief of Engi neers, for its early recognition of the value of geologic studies in the Aleutian region, and to the several military departments for their support.
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