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No. 48: Nov-Dec 1986

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Geocorrosion?

In studying the minute electrochemical cells responsible for metal corrosion, J.G. Bellingham and M.L.A. MacVicar, at MIT, discovered a remarkable effect:

"One interesting and surprising property of electrochemical cells was discovered by accident. Normally, the magnetometer scans each cell as the cell moves horizontally beneath the magnetometer. During one run, the researchers left the cell in a single position for a long time while the magnetometer was still on. After 20 minutes or so, the magnetic field strength began to drop. 'It was very dramatic to watch this field collapse,' says MacVicar. After about a minute at zero, the magnetic field grew larger again but in the opposite direction."

These reversals occurred over and over again at regular intervals.

(Peterson, I.; "Tracing Corrosion's Magnetic Field," Science News, 130:132, 1986.)

Comment. The self-reversal of magnetic specimens has been observed before under some conditions, but here is a periodic reversal of an electrochemical system. Why place it under the heading of Geology? Because the earth's field seems to reverse on a fairly regular basis. Catastrophists have invoked as teroid or cometary collions to account for these flip-flops, but it might be that the earth contains giant electrochemical cells that spontaneously reverse on a million-year timescale rather than minutes. We know the earth's crust is filled with brines and other conducting fluids. Who knows what electrochemical activity transpires down there?

From Science Frontiers #48, NOV-DEC 1986. 1986-2000 William R. Corliss

Science Frontiers Sourcebook Project Reviewed in:

Quotes

  • "A sourcebook of unexplained phenomena is therefore a valuable addition to a collection of scientific literature. William R. Corliss has provided this in the past with his source books of scientific anomalies in several subjects, and now he has provided it for astronomy. He has done an excellent job of collecting and editing a large amount of material, taken in part from scientific journals and in part from scientific reporting in the popular or semi-scientific press." -- "The Mysterious Universe: A Handbook of Astronomical Anomalies", reviwed by Thomas Gold, Cornell University, in Icarus, vol.41, 1980

  • "An interesting, systematic presentation of unusual weather [..] This book is recommended for a general audience" --"Corliss, William R., Tornados, Dark Days, Anomalous Precipitation, and Related Weather Phenomena, Sourcebook Project, 1983.", revieweed in Choice, September 1983
  • "..the science is necessarily somewhat speculative, but Corliss's symthesis is based on reputable sources." -- "Corliss, William R. (Compiler). Lightning, Auroras, Nocturnal Lights, and Related Luminous Phenomena" reviwed by Joseph M. Moran, Univ. of Wisconsin in Science Books and Films, Sep/Oct 1983

  • "Before opening the book, I set certain standards that a volume which treads into dangerous grounds grounds like this must meet. The author scrupulously met, or even exceeded those standards. Each phenomenon is exhaustively documented, with references to scientific journals [..] and extensive quotations" -- "Book Review: The moon and planets: a catalog of astronomical anomalies", The Sourcebook Project, 1985., Corliss, W. R., Journal of the Royal Astronomical Society of Canada, Vol. 81, no. 1 (1987), p. 24., 02/1987