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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. Oceanographers Jeffery Dean Frautschy; Robert S. (Robert Sinclair) Dietz; Roger Revelle; and K.O. (Kenneth Orris) Emery bringing in a dredge haul aboard the R/V Horizon during 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. 1950.

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Dill, Robert Floyd, 1927-; Horizon (Ship); Midpac Expedition (1950); Frautschy, Jeffery Dean; Dietz, Robert S. (Robert Sinclair), 1914-; Emery, K.O. (Kenneth Orris), 1914-; Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Dredges
    • Format: image
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. [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
  11. Roger Revelle attaches Nansen bottle to lowering cable from starboard bucket

    • Collection: Edward Sheldon Barr Papers
    • Name: Barr, Edward Sheldon, 1933-; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanographic instruments
    • Format: image
  12. 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
  13. 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
  14. Jim Snodgrass and Roger Revelle handling a probe off the side of R/V Horizon

    • Collection: Scripps Institution of Oceanography Photographs
    • Name: Scripps Institution of Oceanography; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991; Snodgrass, James Marion, 1908-1994
    • Date: 1950-09
    • Topic: Heat flow; Oceanographic instruments
    • Format: image
  15. 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
  16. [Roger Revelle on aft deck, R/V HORIZON deploying temperature probe]

    • Collection: Roger Revelle Papers; Scripps Institution of Oceanography Photographs
    • Name: Dill, Robert Floyd, 1927-; Horizon (Ship); Midpac Expedition (1950); Revelle, Roger, 1909-1991
    • Date: 1950
    • Topic: Oceanographic instruments; Heat flow
    • Format: image
  17. 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
  18. 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
  19. 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
  20. 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