Marcus G. Langseth diaries, 1955-1996 2.25 linear feet (2 record cartons) Creator Langseth, Marcus G. Abstract Or Scope Diaries of Marcus G. Langseth, a pioneer in marine geothermal research, researcher at the Lamont-Doherty Earth Observatory, and professor of geology at Columbia University. The diaries include scientific observations and personal anecdotes. view more view less Collection Context Rare Book & Manuscript Library