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  1. Proposed University of California 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: 1949-10-10
    • Topic: MidPac Expedition; Submarine geology; San Diego (Calif.)
    • Format: image
  2. 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
  3. Discovery in the central Pacific of a tremendous underwater mountain range

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: University of California; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950-11-04
    • Topic: Submarine geology; San Diego (Calif.); MidPac Expedition
    • Format: image
  4. We've only Scratched the Pacific's Bottom

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Hamilton, Andrew, 1911-; Midpac Expedition (1950); Horizon (Ship)
    • Date: 1950-12-14
    • Topic: Seamounts; Submarine geology; MidPac Expedition; San Diego (Calif.)
    • Format: image
  5. The Mid-Pacific Expedition of the University of California and the U.S. Navy Electronics Laboratory

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship)
    • Date: 1950-11-01
    • Topic: Seamounts; San Diego (Calif.); MidPac Expedition; Submarine geology
    • Format: image
  6. Lost Continent Found Beneath Surface of Mid-Pacific Ocean

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Los Angeles Times; Midpac Expedition (1950); Horizon (Ship)
    • Date: 1950-11-05
    • Topic: Los Angeles (Calif.); Submarine geology; MidPac Expedition
    • Format: image
  7. 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
  8. 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
  9. Radio dispatch to Norris W. Rakestraw

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991; Rakestraw, Norris W. (Norris Watson), 1895-1982
    • Date: 1950-09-09
    • Topic: Horizon (Ship); Telecommunication; MidPac Expedition; Submarine geology; North Pacific Ocean
    • Format: image
  10. MidPac Scientific Program for 30 July 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: 1950-07-30
    • Topic: Submarine geology; Sounding and soundings; Oceanographic instruments; Oceanography; North Pacific Ocean; Marine biology
    • Format: image
  11. MidPac Scientific Program for August 4, 5 and 6 1950

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Midpac Expedition (1950); Horizon (Ship); Revelle, Roger, 1909-1991; Faughn, James Lawrence, 1910-1985
    • Date: 1950-08-04
    • Topic: North Pacific Ocean; Submarine geology; Hydrophone; Oceanography; Bathythermograph; Drill Core; Oceanographic instruments; Marine biology
    • Format: image
  12. Radio dispatch to Prof. N.W. Rakestraw

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991; Rakestraw, Norris W. (Norris Watson), 1895-1982
    • Date: 1950-08-14
    • Topic: MidPac Expedition; North Pacific Ocean; Submarine geology; Oceanographic research ships; Telecommunication
    • Format: image
  13. New Tools Probe Mysteries of Shifting Undersea Floors

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Christian Science Monitor; Midpac Expedition (1950); Horizon (Ship)
    • Date: 1950-12-23
    • Topic: Boston (Mass.); MidPac Expedition; Submarine geology
    • Format: image
  14. Sea Bottom

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: San Diego Union; Midpac Expedition (1950); Horizon (Ship)
    • Date: 1950-11-05
    • Topic: Submarine geology; San Diego (Calif.); MidPac Expedition
    • Format: image
  15. MidPac Scientific Program for 29 July 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: 1950-07-29
    • Topic: Hydrophone; North Pacific Ocean; Submarine geology; Oceanography; Oceanographic instruments
    • Format: image
  16. Letter to William Walden Rubey

    • Collection: Scripps Institution of Oceanography Letters, Clippings, Ships' Logs
    • Name: Revelle, Roger, 1909-1991; Midpac Expedition (1950); Horizon (Ship); Revelle, Roger, 1909-1991; Rubey, William Walden, 1898-1974
    • Date: 1950-12-11
    • Topic: Dredging; Submarine geology; San Diego (Calif.); Seamounts
    • Format: image
  17. 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
  18. Robert Dietz C-819 rock samples from Midpac dredge haul at station 33C. Midpac Expedition, November 11, 1950

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: United States. Navy Electronics Laboratory; Midpac Expedition (1950); Horizon (Ship); Dietz, Robert S. (Robert Sinclair), 1914-
    • Date: 1950-11-07
    • Topic: Submarine geology; Marine mineral resources
    • Format: image
  19. Figure 11. Total dredge haul from MP 33 D. A coquina of gastropod fragments cemented by calcareous ooze

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship); Wells, John West, 1907-; Hamilton, Edwin L. (Edwin Lee), 1914-
    • Date: 1950
    • Topic: Dredges; Marine mineral resources; Submarine geology
    • Format: image
  20. Dr. Revelle's Rocks, snail shells - taken from guyots - Mid-Pac Mts. NB 4975

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950-09
    • Topic: Submarine geology; Shells--South Pacific Ocean; Dredging
    • Format: image
  21. Dr. Revelle's Rocks

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship); Revelle, Roger, 1909-1991
    • Date: 1950-09
    • Topic: Dredging; Submarine geology
    • Format: image
  22. Robert Dietz C-883 rock samples from Midpac Expediton, left, echinoid from MP 33K; right, sharks tooth in Mn nodule MP 26 A-3. November 7, 1950

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: United States. Navy Electronics Laboratory; Midpac Expedition (1950); Horizon (Ship); Dietz, Robert S. (Robert Sinclair), 1914-
    • Date: 1950-11-07
    • Topic: Manganese Nodules; Submarine geology; Marine mineral resources
    • Format: image
  23. Dill #15 [Man in bucket on R/V HORIZON with Phleager coring device]

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Dill, Robert Floyd, 1927-; Midpac Expedition (1950); Horizon (Ship)
    • Date: 1950
    • Topic: Submarine geology; Oceanographic instruments
    • Format: image
  24. Dr. Revelle's Rocks, material dredged up on MidPac

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950-09
    • Topic: Submarine geology; Dredging
    • Format: image
  25. Rock, Ed Hamilton's samples MidPac Mts. Coral from seamount

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Horizon (Ship); Midpac Expedition (1950); Hamilton, Edwin L. (Edwin Lee), 1914-
    • Date: 1950-09
    • Topic: Submarine geology; Coral; Seamounts; Dredging
    • Format: image
  26. Dr. Revelle's Rocks, manganese nodule MidPac

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship); Revelle, Roger, 1909-1991
    • Date: 1950-09
    • Topic: Dredging; Submarine geology; Manganese Nodules
    • Format: image
  27. Rock, snail shells covered with manganese taken from MidPac Mts., NB4975

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship)
    • Date: 1950
    • Topic: Dredging; Submarine geology; Manganese Nodules
    • Format: image
  28. Dr. Revelle's Rocks [Shark's tooth embedded in rock]

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship)
    • Date: 1950
    • Topic: Submarine geology; Sharks; Dredging
    • Format: image
  29. 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
  30. Globigerina ooze at a depth of 4500 feet on the top of Sylvania Seamount near Bikini Atoll. The ripple marks are about 12 inches apart (Menard unpublished manuscript, Figure 16) At the time, these ripple marks were the deepest ever photographed. Midpac Expedition, 1950

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship); Hamilton, Edwin L. (Edwin Lee), 1914-; Wells, John West, 1907-
    • Date: 1950
    • Topic: Marine mineral resources; Submarine geology; Dredges
    • Format: image
  31. 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
  32. 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
  33. 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
  34. Dredge haul from Sylvania Seamount containing fossil corals. Midpac Expedition, 1950

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship); Hamilton, Edwin L. (Edwin Lee), 1914-; Wells, John West, 1907-
    • Date: 1950
    • Topic: Submarine geology; Dredges; Marine mineral resources
    • Format: image
  35. Dr. Revelle's Rocks, fossil material Mid-Pacific mountains

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Midpac Expedition (1950); Horizon (Ship); Revelle, Roger, 1909-1991
    • Date: 1950-09
    • Topic: Submarine geology; Dredging
    • Format: image