Any compilation and interpretation of mapping as large as this relies heavily on data and insights of prior workers. We also would not have been as successful as we were without the aid of co-workers in the mapping projects that preceded our work. The compilation of data for this map was well along at the time of Robert L. (Buck) Detterman's death; we would not have gotten very far along on this without Bob's patience and mentorship over the years. Many a time during the completion of the map and text we thought hard to try to determine the way Bob would have done things and what he'd have thought about particular topics. We were fortunate to have had the opportunity to work with Bob over the years and fortunate to have access to his tremendous amount of experience and insight into the problems of Alaska Peninsula geology.

Many geologists have contributed to the mapping of the Alaska Peninsula. Workers whose pioneering efforts guided us are referenced in the text. Participants in the projects that these digital data files are a direct outgrowth of included: Narin Albert, 1983; W.H. Allaway, Jr., 1980-81; L.M. Angeloni, 1983-85; Peter Burrell, 1983; J.E. Case, 1977-81, 1983-1985; C.L. Connor, 1982; D.P. Cox, 1977-78, 1980; John Decker, 1985; R.L. Detterman, 1977-86, 1988; G.D. DuBois, 1985, 1988, 1990; C.L. Engelhardt, 1977; B.M. Gamble, 1983-84; S.A. Zurinski, 1986; C.D. Holloway, 1977; D.G. Howell, 1977; T.E.C. Keith, 1984; L.B. Magoon, 1979-80; Louie Marincovich, Jr., 1978; 1982, 1984; Eric Martin, 1984; Hugh McLean, 1977; J.W. Miller, 1979-86; T.P. Miller, 1973-75, 1977-78, 1979, 1981-82, 1988; M.A. Pernokas, 1983; B.L. Reed, 1983-84; J.R. Riehle, 1981-86; Nora Shew, 1981-82; R.A. Spicer, 1977-78; F.R. Weber, 1983-85; F.H. Wilson, 1977-86, 1988, 1990; J.A. Wolfe, 1977-78; M.E. Yount 1977-86, 1988. Their data, efforts, and insights are gratefully acknowledged. In the office, E.E. Harris and M.W. Mullen were always there when needed.John (Jack) W. Miller, Ralph W. Imlay, Louie Marincovich Jr., and John (Jack) A. Wolfe contributed fossil determinations and geologic mapping that help to establish much of the stratigraphic control; potassium-argon geochronology by Wilson, Nora Shew, and DuBois in combination with fossil data help to establish age control. Florence R. Weber contributed a great deal to the mapping of the Quaternary deposits, picking up and carrying on where Bob left off. Thomas P. Miller made available unpublished mapping in the vicinity of Mount Dutton and Emmons Caldera. James E. Case, in addition to contributing a great deal of geologic mapping, provided much in the interpretation of available geophysical data. Many people on the Alaska Peninsula and helicopter pilots and mechanics made each field season possible, if not pleasurable. Especially memorable were the contributions of Glenn Bell (pilot) and Lewis Webb (mechanic and field assistant). The captain and crew of the RV Don J. Miller during the years 1977 to 1984 were of immeasurable aid in making it all happen, keeping us warm, dry, and fed. In particular, Chief Engineer Edgar Maghalaes and Captain A.C. (Frosty) Frothingham were there for us. Reviews by J.R. Riehle, J.C. Moore, and C.M. Molenaar are gratefully acknowledged for the errors they pointed out, the guidance freely offered, and the support given. Discussions of geology and terrane issues from areas beyond the map area were enjoyable and constructive with B.L. Reed, D.C. Bradley, Bela Csejtey, and J.H. Dover.

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