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  1. Oceanographer Roger Revelle (extreme right) with other scientists at the Bikini Atoll encampment located in the Marshall Islands, during the Mid-Pac Expedition (1950). 1950.

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Morita, Richard Y.; Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanography--Field work (land); Bikini Atoll (Marshall Islands); Scientific expeditions
    • Format: image
  2. Robert Floyd Dill and Roger Revelle rigging a Kullenberg piston core sampler. Midpac Expedition, 1950

    • Collection: Edward Sheldon Barr Papers
    • Name: Scripps Institution of Oceanography; Horizon (Ship); Midpac Expedition (1950); Dill, Robert Floyd, 1927-; Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanographic instruments
    • 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 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
  4. 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
  5. 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
  6. Roger Revelle, James Snodgrass, and Arthur Maxwell on deck of R/V HORIZON recover the temperature gradient recorder that measures geothermal gradients in the sea floor

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Morita, Richard Y.; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991; Maxwell, Arthur Eugene, 1925-; Snodgrass, James Marion, 1908-1994
    • Date: 1950
    • Topic: Heat flow; Oceanographic instruments; Oceanography
    • Format: image
  7. Scientists on deck of R/V HORIZON. Standing, rear: Edward Barr, Louis Garrison, Jeffery Frautschy, Arthur Maxwell, James Snodgrass. Middle row: Bob Dill, K.O. Emery and Russell Raitt. Front row: Bob Huffer, Tom Runyon, Ed Brayton, Ed Hamilton, and Roger Revelle. Richard Morita seated at front.

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Morita, Richard Y.; Midpac Expedition (1950); Huffer, Robert; Barr, Edward Sheldon, 1933-; Revelle, Roger, 1909-1991; Brayton, Ed; Maxwell, Arthur Eugene, 1925-; Raitt, Russell W.; Frautschy, Jeffery Dean; Snodgrass, James Marion, 1908-1994; Dill, Robert Flooyd, 1927-; Hamilton, Edwin L. (Edwin Lee), 1914-; Runyon, Thomas; Emery, Kennis O. (Kenneth Orris), 1914-; Garrison, Louis
    • Date: 1950
    • Topic: Oceanography--Field work (land); Bikini Atoll (Marshall Islands); Scientific expeditions
    • Format: image
  8. September 24, Bringing supplies ashore to set up camp "Little Petunia", Bikini Atoll. Left to right (foreground) Russell Raitt, Dick Morita, Roger Revelle, Tom Chapman (background) Deane Carlson, Edward Barr

    • Collection: Edward Sheldon Barr Papers
    • Name: Barr, Edward Sheldon, 1933-; Midpac Expedition (1950); Horizon (Ship); Barr, Edward Sheldon, 1933-; Chapman, Tom; Carlson, Dean; Revelle, Roger, 1909-1991; Raitt, Russell W.; Morita, Richard Y.
    • Date: 1950-09-24
    • Topic: Lifeboats; Oceanography--Field work (land)
    • Format: image
  9. Action to: Dr. Rakestraw

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Midpac Expedition (1950); Horizon (Ship); Rakestraw, Norris W. (Norris Watson), 1895-1982; Revelle, Roger, 1909-1991
    • Date: 1950-08-21
    • Topic: Scientific expeditions--Pacific Ocean; Oceanography--Research-- North Pacific Ocean; Hawaii
    • Format: image
  10. Letter to Allyn C. Vine and Beauregard Perkins with enclosure

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Midpac Expedition (1950); Horizon (Ship); Revelle, Roger, 1909-1991; Vine, Allyn C.; Perkins, Beauregard
    • Date: 1950-01-09
    • Topic: San Diego (Calif.); MidPac Expedition; Oceanographic research ships; United States. Office of Naval Research
    • Format: image
  11. Letter to Roger Revelle

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Ladd, Harry Stephen, 1899-; Horizon (Ship); Midpac Expedition (1950); Emery, K.O. (Kenneth Orris), 1914-; Revelle, Roger, 1909-1991; Ladd, Harry Stephen, 1899-
    • Date: 1950-10-09
    • Topic: MidPac Expedition; Marshall Islands--Bikini Atoll; Washington (D.C.)
    • Format: image
  12. Memorandum to Distribution List

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Dietz, Robert S. (Robert Sinclair), 1914-; Revelle, Roger, 1909-1991; Horizon (Ship); Midpac Expedition (1950); Dietz, Robert S. (Robert Sinclair), 1914-; Revelle, Roger, 1909-1991
    • Date: 1950-06-08
    • Topic: MidPac Expedition; U.S. Navy Electronics Laboratory (San Diego, Calif.); San Diego (Calif.)
    • Format: image
  13. Memorandum to Roger Revelle

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Dietz, Robert S. (Robert Sinclair), 1914-; Midpac Expedition (1950); Horizon (Ship); Revelle, Roger, 1909-1991; Dietz, Robert S. (Robert Sinclair), 1914-
    • Date: 1950-06-07
    • Topic: MidPac Expedition; San Diego (Calif.); Seamounts; U.S. Navy Electronics Laboratory (San Diego, Calif.)
    • Format: image
  14. Memorandum] To: Dr. Norris W. Rakestra

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Midpac Expedition (1950); Horizon (Ship); Rakestraw, Norris W. (Norris Watson), 1895-1982; Revelle, Roger, 1909-1991
    • Date: 1950-08-29
    • Topic: Pearl Harbor (Hawaii); Scientific expeditions--Pacific Ocean; Oceanography--Research-- North Pacific Ocean
    • Format: image
  15. MidPac Operations Plan 21/23 September 1950

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Midpac Expedition (1950); Horizon (Ship); Revelle, Roger, 1909-1991
    • Date: 1950-09-21
    • Topic: Drill cores; Submarine geology; Bikini Atoll; Marine biology; Oceanographic instruments; Oceanography; Hydrophone
    • Format: image
  16. MidPac Scientific Program for 1 August 1950

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950-08-01
    • Topic: Marine biology; Heat flow; North Pacific Ocean; Bathythermograph; Oceanography; Oceanographic instruments; Submarine geology
    • Format: image
  17. MidPac Scientific Program for August 11, 1950

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Horizon (Ship); Midpac Expedition (1950); Faughn, James Lawrence, 1910-1985; Revelle, Roger, 1909-1991
    • Date: 1950-08-11
    • Topic: Marine biology; Oceanography; North Pacific Ocean; Bathythermograph; Hydrophone; Oceanographic instruments
    • Format: image
  18. MidPac Scientific Program for August 4 and 5 1950

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991; Faughn, James Lawrence, 1910-1985
    • Date: 1950-08-04
    • Topic: Oceanographic instruments; Bathythermograph; North Pacific Ocean; Oceanography; Hydrophone; Seismic profiling; Drill Core; Submarine geology; Marine biology
    • Format: image
  19. Morning Orders 2 October 1950

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950-10-02
    • Topic: Kwajalein Atoll (Marshall Islands)
    • Format: image
  20. Notes on the Joint Scripps Institution of Oceanography-U.S. Navy Electronics Laboratory Mid-Pacific Expedition

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950-11-01
    • Topic: Navy Electronics Laboratory; South Pacific Ocean
    • Format: image