Source John Phillips (geologist), Wikipedia
Source John R. L. Allen - Wikipedia
Source John Rodgers (geologist) (Wikipedia)
Source John T. Andrews (geologist) (Wikipedia)
Source John Wesley Judd - Wikipedia
Source John Hulke - Wikipedia
Source Joseph Tyrrell (Wikipedia)
Source Joseph Prestwich, Wikipedia
Source Kadir Timergazin (Wikipedia)
Source Kenneth Hsu (Wikipedia)
Source Kent Condie (Wikipedia)
Source Kevin C. A. Burke - Wikipedia
Source Wikipedia: Kingsley Dunham
Source Kshitindramohan Naha (Wikipedia)
Source Laurence L. Sloss - Wikipedia
Source Lazarus Fletcher - Wikipedia
Source Lee Sang-mook (Wikipedia)
Source Leonard Hawkes, Wikipedia
Source Leonard Johnston Wills, Wikipedia
Source Christian Leopold von Buch (Wikipedia)
Source Louis Agassiz (Wikipedia)
Source M. Gordon Wolman - Wikipedia
Source Wikipedia: M. King Hubbert
Source Marcellin Boule, Wikipedia
Source Marie Tharp (Wikipedia)
Source Marland P. Billings - Wikipedia
Source Wikipedia: Marshall Kay
Source Martin Bott, Wikipedia
Source Wikipedia: Maureen Raymo
Source Maurice Gignoux, Wikipedia
Source Maurice Lugeon, Wikipedia
Source Wikipedia: Nelson Horatio Darton
Source Nibir Mandal (Wikipedia)
Source Nicholas Shackleton, Wikipedia
Source Nicolas Steno (Wikipedia)
Source Norman D. Newell - Wikipedia
Source Wikipedia: Norman L. Bowen
Source Olaf Holtedahl, Wikipedia
Source Osmond Fisher - Wikipedia
Source Oswald Heer - Wikipedia
Source Owen Thomas Jones, Wikipedia
Source Wikipedia: Paul F. Hoffman
Source Paul Fourmarier, Wikipedia
Source Pentti Eskola, Wikipedia
Source Peter Vail (Wikipedia)
Source Wikipedia: Philip Burke King
Source Philip Kuenen (Wikipedia)
Source Ours-Pierre-Armand Petit-Dufrenoy, Wikipedia
Source Pierre Pruvost, Wikipedia
Source Pramatha Nath Bose (Wikipedia)
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