Memorial to Wallace M. Cady 1912-1991BRUCE BRYANT

U.S. Geological Survey, Box 25046, Denver Federal Center, Denver, Colorado 80225Wallace M. Cady died in Saint Anthony’s Hospital, Den­ver, Colorado, April 4, 1991, after several years of declin­ing health. He was bom January 29, 1912, in Middlebury,Vermont. His parents, Frank William Cady and Marian Kingsbury Cady were descendants of early settlers of Mid­dlebury. Frank Cady was professor of English at Middle­bury College.

Wallace Cady obtained his B.S. degree in biology and geology at Middlebury College. His enjoyment of the out­doors and hiking and the influence of his uncle, the promi­nent geologist Gilbert Cady, led him to pursue geology. He received his M.S. degree in geology at Northwestern Uni­versity, and his Ph.D. degree in geology from Columbia University. At Columbia his research on the stratigraphy and structure of west-central Vermont under the supervi­sion of Marshall Kay led to the interest in tectonics which marked his career. After he com­pleted the field work for his thesis, he worked two summers for the U.S. Geological Survey on manganese deposits in the Olympic Peninsula under C. F. Park, Jr. Wally later returned to both Vermont and the Olympic Peninsula to work on long-term projects that occupied much of his career.

Wally taught at Brooklyn College for a year and decided that he preferred work with the USGS. In 1941 he became a full-time geologist on the U.S. Geological Survey staff, where he remained for the rest of his career. His first project was a study of quicksilver deposits and reconnaissance geology in the Kuskokwim region of southwestern Alaska. With the help of R. E. Wallace, J. M. Hoare, and E. J. Webber, he made the pioneering study of 10,000 square miles, an area larger than the State of Vermont, which had a population of only 300 at the time. This was before the days of helicopter support, and travel was by boat and by foot. USGS Pro­fessional Paper 268 summarizes the results of this work.

On the way to Alaska for the 1941 field season, which in those days was a relatively leisurely boat trip, he met Helen Raitanen, a daughter of Finnish immigrants and a teacher in Astoria, Oregon. They married on January 1, 1942, and Helen and Wally shared their lives until Helen’s death in 1986. Helen, who had a lively interest in all aspects of civilization and an appreciation of the outdoors, complemented Wally’s dedication to geology. They are survived by Nancy, a foreign service officer with the U.S. State Department, John, a geophysicist with the U.S. Geological Survey, and Norma, an environmental planner with the Navajo tribe, and by five grandchildren.

Following the Alaska work, Wally was assigned the Vermont talc and asbestos project, involving regional geologic mapping and study of ultramafic rocks in north-central Vermont, in which he was aided by A. H. Chidester and A. L. Albee. Wally built upon his doctoral research and contributed to the understanding of the tectonics of northwestern New England in a number of reports, culminating in GSA Memoir 120. This volume is the most thorough synthesis of this complex and fascinating region made before the concepts of plate tectonics prevailed. Wally

89

90 THE GEOLOGICAL SOCIETY OF AMERICAalso participated as coauthor in the compilation of the 1961 edition of the Geologic Map of Ver­mont. About the time that Memoir 120 was printed, the first plate-tectonic interpretations of New England geology appeared. Like many geologists, Wally was reluctant to adopt a plate- tectonics interpretation of New England geology because the early papers on that subject did not have much documentation, involved reinterpretation of existing data, and were done by workers not as familiar with the rocks as he was.

Wally’s next project was back in the West, where he and R. W. Tabor mapped the geology of the rough and inaccessible Olympic Peninsula in a more detailed and complete fashion than had been done previously. Here, Wally climbed the steep slopes and beat the brush well into his seventh decade. He had no difficulty interpreting the geology there in terms of plate tectonics and in several abstracts and papers he contrasted the ease of plate-tectonic interpretation of the geology of the Olympics with the difficulty of that interpretation for New England.

In 1975 Wally was a Fulbright-Hays lecturer on problems of modem tectonics at Voronezh State University, USSR. He was a Fellow of the Geological Society of America, American Geo­physical Union, and American Association for the Advancement of Science, and a member of the Society of Economic Geologists and the Geochemical Society. He served as a associate edi­tor of the GSA Bulletin 1966-1974, as councilor of the Geological Society of Washington, and as president of the Colorado Scientific Society in 1975. He received the Meritorious Service Award of the Department of the Interior in 1983.

Wally and Helen regularly attended International Geological Congresses, where they always took a field excursion or two. Possibly the most interesting experiences they had together were being at the 1968 International Geologic Congress in Prague when the Soviet invasion of Czechoslovakia broke up the meetings and in 1975 living for 4V2 months in Voronezh during Wally’s lectureship. They graciously entertained geologists they met during their international travels at their home in Denver when those geologists came through town.

Wallace Cady showed his Vermont Yankee heritage by his generally quiet manner, under­lain by friendliness and a dry but bawdy sense of humor. He energetically pursued geology with total commitment.

SELECTED BIBLIOGRAPHY OF W. M. CADY1945 Stratigraphy and structure of west-central Vermont: Geological Society of America Bul­

letin, v. 56, p. 515-587.------ Aerial photographs as an adjunct to Arctic and sub-Arctic geologic reconnaissance: New

York Academy of Science Transactions, ser. 2, v. 7, no. 6, p. 135-138.1950 Fossil cup corals from the metamorphic rocks of central Vermont: American Journal of

Science, v. 248, p. 488-497.------ Classification of geotectonic elements: American Geophysical Union Transactions, v. 31,

p. 780-785.1951 (with Chidester, A. H., and Billings, M. P.) Talc invesitigations in Vermont, preliminary

report: U.S. Geological Survey Circular 95,33 p.1955 (and Wallace, R. E., Hoare, J. M., and Webber, E. J.) The central Kuskokwim region,

Alaska: U.S. Geological Survey Professional Paper 268,132 p.1956 Bedrock geology of the Montpelier quadrangle, Vermont: U.S. Geological Survey Geo­

logic Quadrangle Map GQ-79, scale 1:62,500.1960 Stratigraphic and geotectonic relationships in northern Vermont and southern Quebec:

Geological Society of America Bulletin, v. 71, p. 531-576.------ (and Zen, E-an) Stratigraphic relationships of the Lower Ordovician Chipman Formation

in west-central Vermont: American Journal of Science, v. 258, p. 728-739.

MEMORIAL TO WALLACE M. CADY 911961 (with Doll, C. G., Thompson, J. B., Jr., and Billings, M. P.) Centennial geologic map of

Vermont: Vermont Geological Survey, scale 1:250,000.1962 (and Albee, A. L., and Murphy, M. P.) Geologic map of the Lincoln Mountain quadrangle,

Vermont—bedrock geology: U.S. Geological Survey Geologic Quadrangle Map GQ-164, scale 1:62,500.

1963 (and Albee, A. F., and Chedister, A. H.) Bedrock geology and asbestos deposits of the Upper Mississquoi Valley and vicinity, Vermont: U.S. Geological Survey Bulletin 1122-B, p. B1-B78.

1967 Geosynclinal setting of the Appalachian Mountains in southeastern Quebec and northwest­ern New England: Royal Society of Canada Special Publication 10, p. 57-68.

1968 Tectonic setting and mechanism of the Taconic slide: American Journal of Science, v. 266, p. 563-578.

------ The lateral transition from the miogeosynclinal to the eugeosynclinal zone in northwesternNew England and adjacent Quebec, in Zen, E-an, White, W. S., and Hadley, J. B., eds., Studies in Appalachian geology: Northern and Maritime: New York, Interscience Publish­ers, p. 151-161.

1969 Regional tectonic synthesis of northwestern New England and adjacent Quebec: Geologi­cal Society of America Memoir 120,181 p.

1970 (with Gilluly, James, and Reed, J. C., Jr.) Sedimentary volumes and their significance: Geological Society of America Bulletin, v. 81, p. 353-375.

1972 (and Sorenson, M. L., and MacLeod, N. S.) Geologic map of the Brothers quadrangle, Jef­ferson, Mason, and Kitsap Counties, Washington: U.S. Geological Survey Geologic Quadrangle Map GQ-969, scale 1:62,500.

------ (and Tabor, R. W., MacLeod, N. S., and Sorenson, M. L.) Geologic map of the Tyler Peakquadrangle, Clallam and Jefferson Counties, Washington: U.S. Geological Survey Quad­rangle Map GQ-970, scale 1:62,500.

------ Are the Ordovician northern Appalachians and the Mesozoic Cordilleran system homolo­gous?: Journal of Geophysical Research, v. 77, p. 3806-3815.

------ (with Chidester, A. H.) Origin and emplacement of alpine-type ultramafic rocks: Nature,Physical Science, v. 240, p. 27-31.

1973 The earmarks of subduction, in Tarling, D. H., and Runcorn, S. K., eds., Implications of continental drift to the earth sciences, Volume 2: London and New York, Academic Press, p. 955-961.

1975 Tectonic setting of Tertiary volcanic rocks of the Olympic Peninsula, Washington: U.S. Geological Survey Journal of Research, v. 3, p. 570-582.

1978 (with Tabor, R. W., with major unpublished contributions from MacLeod, N. S., Rau,W. W., Snavely, P. D., and Stewart, R. J.) Geologic map of the Olympic Peninsula, Washington: U.S. Geological Survey Miscellaneous Geologic Investigations Map 1-994, scale 1:125,000.

------ (with Tabor, R. W.) The structure of the Olympic Mountains, Washington— Analysis of asubduction zone: U.S. Geological Survey Professional Paper 1033, 38 p.

------ (with Chidester, A. H., and Albee, A. L.) Petrology, structure, and genesis of the asbestosbearing ultramafic rocks of the Belvidere Mountain area in Vermont: U.S. Geological Sur­vey Professional Paper 1016, 95 p.

------ (with Voight, Barry) Transported rocks of Taconide zone, eastern North America, inVoight, Barry, ed., Developments in geotechnical engineering 14A, Rockslides and avalanches 1, Natural phenomena: Amsterdam, Oxford, and New York, Elsevier, p. 501-561.

Printed in U.S.A. on Recycled Paper 11/91