By Stow, Dorrik
By Peter Molnar, Peter Molnar (Professor of Geological Sciences, University of Colorado)
By Smith, Robert B., Siegel, Lee J.
By A.H.G. Mitchell, M.S. Garson
By British Geological Survey
By Lenton, Tim, Watson, Andrew
By Middlemiss, Frank A.
By Rider, M.H.
By Ziegler, Peter A.
By Welland, Michael
By Baxter, Stephen
By Wegener, Alfred
By Fortey, Dr Richard
By Southwood, Richard
By Lowe, J. John
By Lyons, S. Kathleen, Behrensmeyer, Anna K., Wagner, Peter J., Peter
By Hay, William W.
By Dr. Ken Rubin, Michael Allaby, Dr. Robert R. Coenraads
By Morris, A., Tarling, D. H.
By Boldy, S.A.R.
By Scrutton, R.A., etc., Stoker, M.S., Shimmield, G.B., Tudhope, A.W.
By Lucas, S. G., Cassinis, G., Schneider, J.W.
By Vaughan, A. P. M., Leat, P. T., Pankhurst, R. J.
By Nottvedt, A.