Copies of author's previously published works inserted. / Bibliography: p. 157-165. / ix, 165 p. : ill. (chiefly col.), maps ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Sonic velocities from the Danian Chalk, Upper Cretaceous Chalk, Lower Cretaceous Greensand/Gault Clay, Lower Cretaceous Wealden, Upper Jurassic mudstones, Triassic Mercia Mudstone, and Triassic Sherwood Sandstone have been used to quantify apparent exhumation in the Celtic Sea/South Western Approaches. / Thesis (Ph.D.)--University of Adelaide, Dept. of Geology and Geophysics, 1998