Preface. Seismic imaging of lithospheric discontinuities and continental evolution (M.G. Bostock). The deep structure of the Australian continent from surface wave tomography (F.J. Simons et al.). Velocity structure of the continental upper mantle: evidence from southern Africa (K. Priestley). Imaging the continental upper mantle using electromagnetic methods (A.G. Jones). Heat flow and the structure of Precambrian lithosphere (A.A. Nyblade). The thermal structure and thickness of continental roots (C. Jaupart, J.C. Mareschal). Stability and dynamics of the continental tectosphere (S.S. Shapiro et al.). The continental tectosphere and Earth's long-wavelength gravity field (S.S. Shapiro et al.). The evolution of continental roots in numerical thermo-chemical mantle convection models including differentiation by partial melting (J.H. de Smet et al.). The age of continental roots (D.G. Pearson). Nature of the mantle roots beneath the North American craton: mantle xenolith evidence from Somerset Island kimberlites (S.S. Schmidberger, D. Francis). Evidence from mantle xenoliths for relatively thin (< 100 km) continental lithosphere below the Phanerozoic crust of southernmost South America (C.R. Stern et al.). Erosion of lithospheric mantle beneath the East African Rift system: geochemical evidence from the Kivu volcanic province (T. Furman, D. Graham). Trace element compositions of minerals in garnet and spinel peridotite xenoliths from the Vitim volcanic field, Transbaikalia, eastern Siberia (S.M. Glaser et al.). Growth of subcontinental lithosphere: evidence from repeated dike injections in the Balmuccia Iherzolite massif, Italian Alps (S.B. Mukasa, J.W. Shervais). Evidence for Archean ocean crust with low high field strength element signature from diamondiferous eclogite xenoliths (D.E. Jacob, S.F. Foley). Author index. Subject index.