Geology and Oceanography: Biographies
- Henry Clifton Sorby
- Henry Fairfield Osborn
- Inge Lehmann
- J Harlen Bretz
- Jacques Yves Cousteau
- James Dwight Dana
- James Hall
- James Hutton
- Jean Andre Deluc
- Jean-etienne Guettard
- Johan Hermann Lie Vogt
- Johannes Walther
- John Farey
- John Milne
- John Playfair
- John Strachey
- John Tuzo Wilson
- John Wesley Powell
- John Winthrop (scientist)
- Josiah Dwight Whitney