Geomagnetism research, 1965

Geomagnetism research, 1965

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Credit: LIBRARY OF CONGRESS/SCIENCE PHOTO LIBRARY

Caption: Geomagnetism research. US geologists Allan Verne Cox (left, 1926-1987), Richard Doell (centre, 1923-2008), and (Gary) Brent Dalrymple (right, born 1937) with a Curie balance for measuring rock magnetism. All three worked in the 1960s on geomagnetic reversals, developing the timescales allowing magnetic changes in rocks to be used for geological dating. Cox and Doell received shares of the 1970 Vetlesen Prize for this work. Photographed circa 1965 at the US Geological Survey, Rock Magnetics Laboratory, Menlo Park, California, USA. This photograph is part of the Historic American Engineering Record (HAER).

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