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  1. Roger Revelle and Robert Dietz, co-chief scientists on the MidPac Expedition of 1950, discussing significance of lithified globigerina ooze dredged from western Pacific. The Cretaceous fossils enclosed indicated a much younger age than expected -- a mystery which remained unresolved until later explained by plate tectonics and continental drift. Shot 1 of 3

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Midpac Expedition (1950); Horizon (Ship); Revelle, Roger, 1909-1991; Dietz, Robert S. (Robert Sinclair), 1914-
    • Date: 1951
    • Topic: Oceanographers; Submarine geology
    • Format: image
  2. Roger Revelle and Robert Dietz, co-chief scientists on the MidPac Expedition of 1950, discussing significance of lithified globigerina ooze dredged from western Pacific. The Cretaceous fossils enclosed indicated a much younger age than expected -- a mystery which remained unresolved until later explained by plate tectonics and continental drift. Shot 2 of 3

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991; Dietz, Robert S. (Robert Sinclair), 1914-
    • Date: 1951
    • Topic: Oceanographers; Submarine geology
    • Format: image
  3. Roger Revelle and Robert Dietz, co-chief scientists on the MidPac Expedition of 1950, discussing significance of lithified globigerina ooze dredged from western Pacific. The Cretaceous fossils enclosed indicated a much younger age than expected -- a mystery which remained unresolved until later explained by plate tectonics and continental drift. Shot 3 of 3

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991; Dietz, Robert S. (Robert Sinclair), 1914-
    • Date: 1950
    • Topic: Oceanographers; Submarine geology
    • Format: image
  4. [Roger Revelle, left foreground, and scientists at Bikini encampment]

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Morita, Richard Y.; Midpac Expedition (1950); Frautschy, Jeffery Dean; Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanography--Field work (land); Oceanographers; Bikini Atoll (Marshall Islands); Scientific expeditions
    • Format: image
  5. Bikini Encampment: Standing (L to R): unidentified, Robert Dill?, Roger Revelle, unidentified, Edwin Hamilton; Seated (L to R): Jeffery Frautschy, Robert Dietz, H. William Menard, K.O. Emery and Unidentified. Midpac Expedition, 1950

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Morita, Richard Y.; Midpac Expedition (1950); Horizon (Ship); Emery, Kenneth O. (Kenneth Orris), 1914-; Dietz, Robert S. (Robert Sinclair), 1914-; Menard, Henry W. (Henry William), 1920-1986; Frautschy, Jeffery Dean; Revelle, Roger, 1909-1991; Hamilton, Edwin L. (Edwin Lee), 1914-; Dill, Robert Floyd, 1927-
    • Date: 1950
    • Topic: Oceanography--Field work (land); Oceanographers
    • Format: image
  6. Fantail of R/V Horizon, MidPac Expedition, 1950: Back: James Marion Snodgrass, Arthur E. Maxwell, Jeffery Frautschy, Lew Garrison, Ned Barr; Front: Russell Raitt, Kenneth O. Emery, Robert Floyd Dill, Roger Revelle, Edwin L. Hamilton, Ed Brayton, Tom Runyon, Bob Huffer; Richard Y. Morita squatting in front.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship); Emery, K. O. (Kenneth Orris), 1914-; Garrison, Lew; Hamilton, Edwin L. (Edwin Lee), 1914-; Morita, Richard Y.; Raitt, Russell W.; Snodgrass, James Marion, 1908-1994; Revelle, Roger, 1909-1991; Barr, Edward Sheldon, 1933-; Dill, Robert Floyd, 1927-; Frautschy, Jeffery Dean; Maxwell, Arthur Eugene, 1925-
    • Date: 1950
    • Topic: MidPac Expedition; Oceanographers
    • Format: image
  7. Gustaf Arrhenius (sitting) and Roger Revelle examine a drill core, aboard the research vessel Spencer F. Baird (Ship), during the Capricorn Expedition (1952-1953). Circa 1952.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Spencer F. Baird (Ship); Capricorn Expedition (1952-1953); Revelle, Roger, 1909-1991; Arrhenius, Gustaf
    • Date: 1952
    • Topic: Drill cores; Oceanographers; Marine geology
    • Format: image
  8. Isaacs, Revelle, Menard discuss plan for the day, R/V HORIZON

    • Collection: Edward Sheldon Barr Papers
    • Name: Barr, Edward Sheldon, 1933-; Horizon (Ship); Midpac Expedition (1950); Menard, Henry W. (Henry William), 1920-1986; Isaacs, John D. (John Dove); Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanographers
    • Format: image
  9. Members of the Capricorn Expedition (1952-1953) enjoying a party on the deck of the R/V Spencer F. Baird. Walter Heinrich Munk is the man wearing glasses to the right of the round cylinder on the left side of photo, the white rope in the middle leads down to Roger Revelle (his back to the camera). 1953.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Jones, Alan Churchill, 1927-; Spencer F. Baird (Ship); Capricorn Expedition (1952-1953); Munk, Walter H. (Walter Heinrich), 1917-; Revelle, Roger, 1909-1991
    • Date: 1953
    • Topic: Islands; Entertaining; Oceanographers
    • Format: image
  10. Milton Nunn Bramlette (left) and Roger Revelle are reviewing some core samples aboard the research vessel Spencer F. Baird (Ship), during the Capricorn Expedition (1952-1953). Circa 1952.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Spencer F. Baird (Ship); Capricorn Expedition (1952-1953); Bramlette, Milton Nunn, 1896-1977; Revelle, Roger, 1909-1991
    • Date: 1952
    • Topic: Drill cores; Oceanographers; Marine geology
    • Format: image
  11. Oceanographer's Roger Revelle holding some cable and about to be spiked by Gustaf Arrhenius, as a joke for the camera, during the Capricorn Expedition (1952-1953). This was the first Scripps Institution of Oceanography expedition to use scuba divers to explore the Pacific. Research ships Horizon and Spencer F. Baird mapped seamounts and guyots and other features of the Pacific seafloor. Scientists studied the 35,400 foot deep Tonga Trench, the second deepest place in the ocean, and measured heat flow on the East Pacific Rise. 1952.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Capricorn Expedition (1952-1953); Spencer F. Baird (Ship); Horizon (Ship); Revelle, Roger, 1909-1991; Arrhenius, Gustaf
    • Date: 1952
    • Topic: Wit and humor--Pictorial; Oceanographic instruments; Oceanographers
    • Format: image
  12. Oceanographers Roger Revelle and John D. (John Dove) Isaacs on the dock discussing the research work that they will be doing for the Midpac Expedition (1950). This expedition involved Scripps Institution of Oceanography and the U.S. Navy which discovered the Mid-Pacific Mountain Range on the bottom of the Pacific Ocean and confirmed Darwin's theory about the origin of atolls. Scientists were surprised to find that the seafloor was young, deep and rocky, not flat, old and filled with sediments. Measurements of continental heat flow from the ocean raised questions about the history of the Pacific Ocean basin that were later answered by Plate Tectonics theory. 1950.

    • Collection: Edward Sheldon Barr Papers
    • Name: Barr, Edward Sheldon, 1933-; Midpac Expedition (1950); Horizon (Ship); Isaacs, John D. (John Dove); Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanographers
    • Format: image
  13. P.P.I. Baird Departure Trans-pack Dept 7-1953 [Warren S. Wooster and Roger Revelle at Spencer F. Baird departure for Transpac Expedition]

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: SIO Photographic Laboratory; Transpac Expedition; Spencer F. Baird (Ship); Wooster, Warren S.(Warren Scriver), 1921-; Revelle, Roger, 1909-1991
    • Date: 1953-07
    • Topic: Oceanographers
    • Format: image
  14. P.P.I. Trans pack Arrival 12-5-1953 [Roger Revelle on dock greeting ship]

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: SIO Photographic Laboratory; Spencer F. Baird (Ship); Transpac Expedition; Revelle, Roger, 1909-1991
    • Date: 1953-12-05
    • Topic: Oceanographers; Scientific expeditions--Japan; Oceanographic research ships; Oceanography--Research--North Pacific Ocean
    • Format: image
  15. Roger R. Revelle has been Director of the Scripps Institution of Oceanography since 1951.

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Revelle, Roger, 1909-1991
    • Date: 1953
    • Topic: Oceanographers
    • Format: image
  16. Roger Revelle and Jeffery Dean Frautschy gloating over the wire cable delivered to the research vessel Spencer F. Baird on the eve of the departure of the Scripps Institution of Oceanography's Capricorn Expedition (1952-1953). This was the first Scripps expedition to use scuba divers to explore the Pacific. Scientists mapped seamounts and guyots and other features of the Pacific seafloor. Scientists also studied the 35,400 foot deep Tonga Trench, the second deepest place in the ocean, and measured heat flow on the East Pacific Rise. October 25, 1952.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Capricorn Expedition (1952-1953); Spencer F. Baird (Ship); Frautschy, Jeffery Dean; Revelle, Roger, 1909-1991
    • Date: 1952-10-25
    • Topic: Oceanographers; Oceanographic instruments
    • Format: image
  17. Roger Revelle on board the research vessel Spencer F. Baird (Ship) during the Capricorn Expedition (1952-1953), he was serving as the expedition leader and also director of Scripps Institution of Oceanography at the time. Circa 1952.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Spencer F. Baird (Ship); Capricorn Expedition (1952-1953); Revelle, Roger, 1909-1991
    • Date: 1952
    • Topic: Oceanographers
    • Format: image
  18. Scientists on the fantail of R/V Spencer F. Baird (ship) homeward bound from the Capricorn Expedition (1952-1953). Back row (left to right): Richard von Herzen; Roger Revelle; Willard N. Bascom; Theodore Robert Folsom; Alan Churchill Jones; Gustaf Arrhenius; Henri Rotschi; Robert Livingston; Russell Raitt. Seated (Left to right): Philip E. Jackson; Richard E. Blumberg; Ronald Mason; Robert Floyd Dill; Arthur Eugene Maxwell; Winter Davis Horton; Walter H. (Walter Heinrich) Munk; and Helen Raitt. February 1953.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Capricorn Expedition (1952-1953); Spencer F. Baird (Ship); Von Herzen, Richard P.; Raitt, Helen; Jones, Alan Churchill, 1927-; Bascom, Willard N., 1916-; Livingston, Robert; Arrhenius, Gustaf; Revelle, Roger, 1909-1991; Horton, Winter Davis; Maxwell, Arthur Eugene, 1925-; Jackson, Philip E.; Mason, Ronald G.; Folsom, Theodore Robert, 1908-1989; Rotschi, Henri; Munk, Walter H. (Walter Heinrich), 1917-; Raitt, Russell W.; Dill, Robert Floyd, 1927-; Blumberg, Richard
    • Date: 1953-02
    • Topic: Oceanographers
    • Format: image
  19. Scientists, Regents and University of California officials aboard R/V HORIZON in San Diego for the March 26, 1951, dedication of Thomas Wayland Vaughan Aquarium Museum. L to R: Roger R. Revelle, Russell W. Raitt, Robert S. Dietz, Carl Sauer, Hugh Miller, Edward Goldberg, Carl Epling, Theodore Jahn, Martin W. Johnson, Allan DeLacy, John D. Isaacs, James M. Snodgrass, Capt. Dundas Tucker, George Beadle, Lawrence Blinks, Ben B. Cox, J.P. Maxfield, C.C. Lauritsen, John Adkins, Claude E. ZoBell, Vernon O. Knudsen, Lee Kinsey, Louis Slichter, Columbus Iselin, Carl L. Hubbs, Norris Rakestraw and Daniel Merriman

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: United States. Navy Electronics Laboratory; Horizon (Ship); Revelle, Roger, 1909-1991; Sauer, Carl Ortwin, 1889-; DeLacy,Allan; Jahn, Theodore Louis, 1905-, Johnson, Martin W. (Martin Wiggo), 1893-1984; Isaacs, John D. (John Dove); Raitt, Russell W.; Dietz, Robert S. (Robert Sinclair), 1914-; Epling, Carl Clawson, 1894-; Goldberg, Edward D.; Miller, Hugh; Snodgrass, James Marion, 1908-1994
    • Date: 1951-03-26
    • Topic: Oceanographic research ships; Oceanographers
    • Format: image
  20. Some members the Capricorn Expedition (1952-1953) on their way back from Viti Levu after a day of diving with the Fijians at the island of Serua. 1952.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Capricorn Expedition (1952-1953); Spencer F. Baird (Ship); Raitt, Russell W.; Dietz, Robert S. (Robert Sinclair), 1914-; Revelle, Roger, 1909-1991
    • Date: 1952
    • Topic: Canoes and canoeing; Oceanographers; Beaches--Fiji--Viti Levu
    • Format: image
  21. Bikini Encampment: Standing (L to R): unidentified, Robert Dill?, Roger Revelle, unidentified, Edwin Hamilton; Seated (L to R): Jeffery Frautschy, Robert Dietz, H. William Menard, K.O. Emery and Unidentified. Midpac Expedition, 1950

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Morita, Richard Y.; Midpac Expedition (1950); Horizon (Ship); Dietz, Robert S. (Robert Sinclair), 1914-; Menard, Henry W. (Henry William), 1920-1986; Hamilton, Edwin L. (Edwin Lee), 1914-; Dill, Robert Floyd, 1927-; Emery, Kenneth O. (Kenneth Orris), 1914-; Frautschy, Jeffery Dean; Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanography--Field work (land); Oceanographers
    • Format: image
  22. Group on the fantail of R/V Spencer F. Baird homeward bound from the Capricorn Expedition (1952-1953). Standing: Richard von Herzen; Roger Revelle; Willard N. Bascom; Theodore Robert Folsom; unidentified; Alan Churchill Jones; Gustaf Arrhenius; Henri Rotschi; Robert Livingston; Helen Raitt; and Russell W. Raitt; Seated: Philip E. Jackson; Richard E. Blumberg; Ronald Mason; Robert Floyd Dill; Arthur Eugene Maxwell; Winter Davis Horton; and Walter H. (Walter Heinrich) Munk. February 1953.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Capricorn Expedition (1952-1953); Spencer F. Baird (Ship); Revelle, Roger, 1909-1991; Maxwell, Arthur Eugene, 1925-; Von Herzen, Richard P.; Dill, Robert Floyd, 1927-; Raitt, Helen; Arrhenius, Gustaf; Bascom, Willard N., 1916-; Folsom, Theodore Robert, 1908-1989; Munk, Walter H. (Walter Heinrich), 1917-; Raitt, Russell W.; Blumberg, Richard E.; Jackson, Philip E.; Mason, Ronald; Jones, Alan Churchill, 1927-; Livingston, Robert; Rotschi, Henri; Horton, Winter Davis
    • Date: 1953-02
    • Topic: Oceanographers
    • Format: image
  23. Jeff [Scientists on deck of R/V HORIZON. Rear, standing:] Ed Barr, Louis Garrison, Jeffery Frautschy, Arthur Maxwell, James Snodgrass. Middle row: Bob Dill, K.O. Emery, Russell Raitt. Front row: Bob Huffer, Tom Runyon, Ed Brayton, Edwin Hamilton, Roger Revelle. Dick Morita is seated in the foreground.

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Frautschy, Jeffery Dean; Horizon (Ship); Midpac Expedition (1950); Hamilton, Edwin L. (Edwin Lee), 1914-; Runyon, Thomas; Morita, Richard Y.; Revelle, Roger, 1909-1991; Raitt, Russell W.; Frautschy, Jeffery Dean; Brayton, Edward; Emery, K.O. (Kenneth Orris), 1914-; Maxwell, Arthur Eugene, 1925-; Dill, Robert Floyd, 1927-; Snodgrass, James Marion, 1908-1994; Huffer, Robert; Garrison, Louis; Barr, Edward Sheldon, 1933
    • Date: 1950
    • Topic: Oceanographers
    • Format: image
  24. Midpac Expedition scientific party at Bikini. Front row: Jeffery Frautschy, Robert Dietz, H. William Menard, Kenneth O. Emery, unidentified; Back row: unidentified, Robert Dill, Roger Revelle, unidentified, Ed Hamilton. 1950

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Morita, Richard Y.; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991; Frautschy, Jeffery Dean; Emery, K.O. (Kenneth Orris), 1914-; Dill, Robert Floyd, 1927-; Menard, Henry W. (Henry William), 1920-1986; Dietz, Robert S. (Robert Sinclair), 1914-
    • Date: 1950
    • Topic: Bikini Atoll (Marshall Islands); Oceanographers
    • Format: image
  25. Milton Nunn Bramlette (sitting) and Roger Revelle are carefully removing a core sample aboard the research vessel Spencer F. Baird (Ship), during the Capricorn Expedition (1952-1953) while an unidentified man watches. Circa 1952.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Capricorn Expedition (1952-1953); Spencer F. Baird (Ship); Revelle, Roger, 1909-1991; Bramlette, Milton Nunn, 1896-1977
    • Date: 1952
    • Topic: Marine geology; Drill cores; Oceanographers
    • Format: image
  26. Oceanographers Revelle, Roger, Robert S. (Robert Sinclair) Dietz, and Russell W. Raitt on their way back to Viti Levu after a day of diving with the Fijians on the island of Serua during the Capricorn Expedition (1952-1953). Circa 1952.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Spencer F. Baird (Ship); Capricorn Expedition (1952-1953); Revelle, Roger, 1909-1991; Dietz, Robert S. (Robert Sinclair), 1914-; Raitt, Russell W.
    • Date: 1952
    • Topic: Canoes and canoeing; Beaches--Fiji--Viti Levu; Oceanographers
    • Format: image
  27. P.P.I. Baird Departure Trans-pac Dept.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Transpac Expedition; Spencer F. Baird (Ship); Revelle, Roger, 1909-1991; Wooster, Warren Shriver, 1921-
    • Date: 1953-07
    • Topic: Oceanographers; Harbors; Oceanographic research ships
    • Format: image
  28. Portrait of Roger Revelle

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Revelle, Roger, 1909-1991
    • Date: 1957
    • Topic: Oceanographers; Portrait photography
    • Format: image
  29. Researchers on Scripps Institution's first post war expedition into the Pacific Ocean, Operation MidPac in 1950, checking the contents of a dredge haul. Then Acting Director Roger Revelle is in left foreground. L to R: Roger Revelle, Bob Dietz, Ed Hamilton, Ken Emery, Bob Dill, Dana Carlson.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Horizon (Ship); Midpac Expedition (1950); Dill, Robert Floyd, 1927-; Carlson, Dean; Emery, K. O. (Kenneth Orris), 1914-; Hamilton, Edwin L. (Edwin Lee), 1914-; Dietz, Robert S. (Robert Sinclair), 1914-; Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanographers; Marine mineral resources; Submarine geology
    • Format: image
  30. Robert Dill, Roger Revelle and group swimming off the side of the research vessel Horizon during the MidPac Expedition (1950). 1950.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Morita, Richard Y.; Horizon (Ship); Midpac Expedition (1950); Dill, Robert Floyd, 1927-; Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Swimmers; Oceanographers
    • Format: image
  31. Roger R. Revelle

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950-09-14
    • Topic: Oceanographers
    • Format: image
  32. Roger Revelle is telling "Lala" (Mrs. Sarah Winchester Hall) that he likes Tahiti, during a break from the Capricorn Expedition (1952-1953). January 17, 1953.

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Capricorn Expedition (1952-1953); Revelle, Roger, 1909-1991; Hall, Sarah Winchester
    • Date: 1953-01-17
    • Topic: Oceanographers
    • Format: image
  33. Scientists examine contents of dredge haul on deck of R/V HORIZON. Left to Right: Roger Revelle, Ed Hamilton, Robert Dietz, Ken Emery, Deane Carlson

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Frautschy, Jeffery Dean; Horizon (Ship); Midpac Expedition (1950); Dietz, Robert Sinclair, 1914-; Hamilton, Edwin L. (Edwin Lee), 1914-; Emery, K.O. (Kenneth Orris), 1914-; Carlson, Dean; Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanographers; Submarine geology; Dredging
    • Format: image