By Cally Hall
By Vic Parker
By Andrew McLeish, Ron Grigson
By Karl W. Butzer
By K Moseley, G Bennison
By Bjorn Wold, Leif Ryvarden, Donna Lunney Vear, Brit Henschien
By Cooke, Ronald U., Warren, Andrew, Goudie, Andrew S.
By Edward M. Moores
By Janet Watson
By John W. Elder
By Con Gillen
By Seth Stein (Dept. of Geological Sciences, Northwestern University, Evanston, IL), Michael Wysession (Dept. of Earth and Planetary Sciences, Washington University, St. Louis, MO)
By R.M. Pegrum, etc.
By Cox, Professor Brian, Cohen, Andrew
By British Geological Survey, M.G. Sumbler
By Arthur J. Whiteman
By Jim Smith, Nicholas A. Beresford
By Max Wisshak, Hazel A. Barton
By B.A. Hains, British Geological Survey
By Dale E. Newbury (National Institute of Standards and Technology, Gaithersburg, MD, USA), Patrick Echlin, David C. Joy, Charles Fiori, Eric Lifshin
By Roger Mason
By Courtney White
By Siegfried Siegesmund, Rolf Snethlage
By Paul D. Komar
By Peter D. Tyson, Roland Fuchs, Congbin Fu, Louis Lebel, Hermine Vloemans
By Thomas E. Downing
By Eric F. Lambin, Helmut J. Geist
By William J. Neal