List of Geologists - J

J

• Thomas Jaggar (1871-1953), USA, volcanologist and founder of the Hawaiian Volcano Observatory.
• James A. Jensen (1911–1998), USA, distinguished dinosaur paleontologist and sculptor
• Dougal Jerram (1969– ), UK British geologist/earth scientist, television and media presenter and author
• David A. Johnston (1949–1980), USA, volcanologist, killed in the 1980 eruption of Mount St. Helens
• Franc Joubin (1911–1997), Canada (born USA), discovered Elliot Lake uranium district