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No. 40: Jul-Aug 1985

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Megalithic Recycling

During restoration work on a capstone at the tomb of Gavrinis, located on an island just off the Brittany coast, C.-T. Le Roux discovered carvings that had long been concealed. The carvings and the rock itself fit perfectly with the capstone of the Table des Marchands, another famous megalithic monument some 4 kilometers away. Stimulated by this discovery, a third capstone on another monument nearby was found to fit like a jigsaw puzzle piece. The combined result is a huge stela 14 meters high, 3.7 meters wide, and 0.8 meter thick. The total stela would weight about 100 tons. It is decorated on one side with animals (bovids) and other devices. Apparently, this stela once stood near the even larger stela called Grand Menhir Brise or 'er-Grah.' The Grand Menhir Brise is also broken into pieces. Evidently, the period of megalithic tomb building, which probably began about 5,200 BP was preceded by a period when giant, decorated stelae were erected. These stelae were later pulled down and broken up for use in constructing tombs. The civilization that raised the stelae is not well-understood; and one wonders why such impressive monuments were torn down and their engravings concealed. Incidentally, the stela chunk found at Gavrinis weighs about 20 tons and was transported over 4 kilometers across several watercourses.

(Bahn, Paul G.; "Megalithic Recycling in Brittany," Nature, 314:671, 1985.)

Reconstruction of a decorated stela Reconstruction of a decorated stela from capstones on megalithic tombs in Brittany.

From Science Frontiers #40, JUL-AUG 1985. 1985-2000 William R. Corliss

Science Frontiers Sourcebook Project Reviewed in:


  • "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