Recent evidence concerning the structure and composition of the Earth's mantle

Physics and Chemistry of the Earth - Tập 6 - Trang 1-131 - 1965
Don L. Anderson1
1Seismological Laboratory, California Institute of Technology, Pasadena, California, USA

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Adkins, 1940, The Alaska earthquake of July 22, 1957, Bull. Seism. Soc. Am., 30, 353, 10.1785/BSSA0300040353 Ahrens, 1963, Ultrasonic observation of the Calcite-Aragonite transition, J. Geophys. Res., 68, 529, 10.1029/JZ068i002p00529 Ahrens, 1962, An ultrasonic interferometer or high pressure research, J. Geophys. Res., 67, 2935, 10.1029/JZ067i007p02935 Aki, 1961, Crustal structure in Japan from the phase velocity of Rayleigh waves, Bull. Earthquake Res. Inst. Tokyo, 39, 255 Aki, 1961, Upper mantle structure under oceans and continents from Rayleigh waves, Geophys. J., 5, 292, 10.1111/j.1365-246X.1961.tb00338.x Alsop, 1961, Measurement of Q for very long period free oscillations, J. Geophys. Res., 66, 2911, 10.1029/JZ066i009p02911 Alsop, 1963 Alterman, 1961, Propagation of Rayleigh waves in the Earth, Geophys. J., 4, 219, 10.1111/j.1365-246X.1961.tb06815.x Altschuler, 1961, On the internal structure of the Earth, Izv. Geophys. Ser., 33–37 Anderson, 1961, Elastic wave propagation in layered anisotropic media, J. Geophys. Res., 66, 2953, 10.1029/JZ066i009p02953 Anderson, 1962, Love wave dispersion in heterogeneous anisotropic media, Geophysics, 27, 445, 10.1190/1.1439042 Anderson, 1963, Universal Dispersion Curves Anderson, 1962, The effect of anisotropy on continental and oceanic surface wave dispersion (Abstr.), J. Geophys. Res., 67, 1627 Anderson, 1963 Anderson, 1963, Surface waves on a spherical earth, J. Geophy. Res., 68, 3483, 10.1029/JZ068i011p03483 Archambeau, 1961, Earth Structure from the Inversion of Surface Wave Dispersion Data Archambeau, 1963 Arkhangelskaya, 1960, Dispersion of Surface Waves and Crustal Structure, Izv. Geophys. Ser., 904 Aver'Yanov, 1961, Deep seismic sounding in the zone of transition from the Asian continent to the Pacific Ocean during the IGY, Izv. Geophys. Ser., 169 Backus, 1962, Long-wave elastic anisotropy produced by horizontal layering, J. Geophys. Res., 67, 4427, 10.1029/JZ067i011p04427 Balakina, 1961, Double refraction in aelotropic layers and some peculiarities of low velocity layer in Earth's mantle. Bur Central Seismol. Internat. Pubs., Ser. A. Travaux, Sci., 87 Bath, 1962, Attenuation and dispersion of G-waves, J. Geophys. Res., 67, 1933, 10.1029/JZ067i005p01933 Beloussov, 1962, Experimental investigation of the recording of deep reflected waves, Izv. Geophys. Ser., 1034 Benioff, 1954, Orogenesis and deep crustal structure—Additional evidence from seismology, Bull. Geol. Soc. Am., 65, 385, 10.1130/0016-7606(1954)65[385:OADCSE]2.0.CO;2 Benioff, 1955, Seismic evidence for crustal structure and tectonic activity, Geol. Soc. Am. Spec. Papers, 62, 61, 10.1130/SPE62-p61 Ben-Menahem, 1961, Source-mechanism from spectra of long-period seismic surface waves. 1. The Mongolian earthquake of December 4, 1957, J. Geophys. Res., 66, 1963 Ben-Menahem, 1963 Berg, 1960, Seismic investigations of crustal structure in the eastern part of the Basin and Range Province, Bull. Seism. Soc. Am., 50, 511 Bernal, 1936, Discussion in Observatory, 59, 268 Biot, 1940, The effect of initial stress on elastic waves, J. Appl. Phys., 11, 522, 10.1063/1.1712807 Birch, 1938, The effect of pressure upon the elastic parameters of isotropic solids, according to Murneghan's Theory of Finite Strain, J. Appl. Phys., 9, 288, 10.1063/1.1710417 Birch, 1947, Finite elastic strain of cubic crystals, Phys. Rev., 71, 809, 10.1103/PhysRev.71.809 Birch, 1952, Elasticity and constitution of the Earth's Interior, J. Geophys. Res., 57, 227, 10.1029/JZ057i002p00227 Birch, 1961, Composition of the Earth's mantle, Geophys. J., 4, 295, 10.1111/j.1365-246X.1961.tb06821.x Bolt, 1962, Gutenberg's early PKP observations, Nature, 196, 122, 10.1038/196122a0 Bolt, 1963, Recent information on the Earth's interior from studies of mantle waves and eigenvibrations, Vol. 5 Bolt, 1961, Phase and group velocities of Rayleigh waves in a spherical, gravitating Earth, J. Geophys. Res., 66, 2965, 10.1029/JZ066i009p02965 Bolt, 1962, Eigenvibrations of the Earth observed at Trieste, Geophys. J., 6, 299, 10.1111/j.1365-246X.1962.tb00353.x Bridgeman, 1951, Some implications for geophysics of high-pressure phenomena, Bull. Geol. Soc. Am., 62, 533, 10.1130/0016-7606(1951)62[533:SIFGOH]2.0.CO;2 Brillouin, 1946 Brooks, 1962, Seismic wave velocities in the New Guinea-Solomon Islands region, Geoph. Monograph, 2, 10.1029/GM006p0002 Brune, 1961, Long-period surface waves from the Chilean earthquake of May 22, 1960, recorded on linear strain seismographs, J. Geophys. Res., 66, 2895, 10.1029/JZ066i009p02895 Brune, 1961, The polar phase shift of surface waves on a sphere, Bull. Seism. Soc. Am., 51, 247 Brune, 1960, A simplified method for the analysis and synthesis of dispersed wave trains, J. Geophys. Res., 65, 287, 10.1029/JZ065i001p00287 Brune, 1961, Group and phase velocities for Rayleigh waves of period greater than 380 seconds, Science, 133, 3455, 10.1126/science.133.3455.757 Brune, 1963, Seismic waves and Earth structure in the Canadian Shield, Bull. Seism. Soc. Am., 53, 167 Bullard, 1957, The density within the Earth, Verhandel. Med. Geol. Mijnbouwk, Genoot. (Geol. Ser.), 18, 23 Bullard, 1961, The flow of heat through the floor of the Atlantic Ocean, 282 Bullard, 1961, The nature of the Mohorovicic Discontinuity, Geophys. J., 6, 118, 10.1111/j.1365-246X.1961.tb02966.x Bullard, 1956, Adv. Geophys., 3, 153, 10.1016/S0065-2687(08)60389-1 Bullen, 1952, On density and compressibility at pressures up to 30 million atmospheres, Mon. Not. R. Astr. Soc. Geophys. Suppl., 6, 383, 10.1111/j.1365-246X.1952.tb03026.x Bullen, 1953, 296 Bullen, 1953, The rigidity of the Earth's inner core, Ann. di Geofisica, 6, 1 Bullen, 1956, Seismology and the broad structure of the Earth's interior, Vol. 1, 68 Bullen, 1956, The influence of temperature gradient and variation of composition in the mantle on the computation of density values in Earth Model A, Mon. Not., R. Astr. Soc. Geophys. Suppl., 7, 214, 10.1111/j.1365-246X.1956.tb05565.x Bullen, 1958, Solidity of the inner core, Vol. 1 Bullen, 1961, Seismic ray theory, Geophys. J., 4, 93, 10.1111/j.1365-246X.1961.tb06806.x Bullen, 1962, Earth's central density, Nature, 196, 973, 10.1038/196973a0 Byerly, 1926, The Montana earthquake of June 28, 1925, Bull. Seism. Soc. Am., 16, 209, 10.1785/BSSA0160040209 Byerly, 1938, The Earthquake of July 6, 1934, Bull. Seism. Soc. Am., 28, 1, 10.1785/BSSA0280010001 Caloi, 1954, L'astenosfera Come Canale-guida dell'energia Sismica, Ann. Geofis., 7, 491 Cardner, 1958, Seismic wave travel times from nuclear explosions, Bull. Seism. Soc. Am., 48, 377, 10.1785/BSSA0480040377 Carr, 1961, Free oscillations of a gravitating solid sphere, 32 Carr, 1962, Toroidal oscillations of the Moon, Icarus, 1, 75, 10.1016/0019-1035(62)90007-6 Chao, 1962, Stishovite, SiO2, a very high pressure new mineral from Meteor Crater, Arizona, J. Geophys. Res., 67, 219, 10.1029/JZ067i001p00419 Coes, 1953, A new dense crystalline silica, Science, 118, 131, 10.1126/science.118.3057.131 Connes, 1962, Observation des Oscillations Propres de la terre, Ann. de Geophysique, 18, 260 Dachile, 1960, High pressure studies of the system MgGeO4Mg2SiO4 with special reference to the olivine-spinel transition, Am. J. Sci., 258, 225, 10.2475/ajs.258.4.225 Daniels, 1961, The pressure variation of the elastic constants of sodium Dahm, 1936, Velocities of P and S waves calculated from the observed travel times of the Long Beach earthquake, Bull. Seism. Soc. Am., 26, 151, 10.1785/BSSA0260020159 Dorman, 1959, Numerical solutions for Love-wave dispersion on a half-space with double surface layer, Geophysics, 24, 12, 10.1190/1.1438550 Dorman, 1960, Study of shear velocity distribution by mantle Rayleigh waves, Bull. Seism. Soc. Am., 50, 87 Doyle, 1963, Travel times to Australian stations from Pacific nuclear explosions in 1958, J. Geophys. Res., 68, 1115, 10.1029/JZ068i004p01115 Evernden, 1958, Finite Strain theory and the Earth's interior, Geophys. J., 1, 10.1111/j.1365-246X.1958.tb00029.x Ewing, 1954, An investigation of mantle Rayleigh waves, Bull. Seism. Soc. Am., 44, 121, 10.1785/BSSA04402A0127 Ewing, 1954, Mantle Rayleigh waves from the Kamchatka earthquake of November 4, 1952, Bull. Seism. Soc. Am., 44, 471, 10.1785/BSSA0440030471 Ewing, 1956, Rayleigh wave dispersion in the period range 10–500 seconds, Trans. A.G.U., 37, 213, 10.1029/TR037i002p00213 Ewing, 1957, 380 Fedotov, 1961, Some results of a detailed study of the seismicity of the South Kuril Islands, Izv. Geophys. Ser, 633 Futterman, 1962, Dispersive body waves, J. Geophys. Res., 67, 5279, 10.1029/JZ067i013p05279 Gassman, 1951, Elastic waves through a packing of spheres, Geophysics, 16, 673, 10.1190/1.1437718 Gaulon, 1962, Vitesse de Groupe et Vitesse de Phase des Ondes de Love Entre 160 et 315 Seconds de Periods, Ann. de Geophysique, 18, 298 Gilbert, 1960, Free oscillations of the Earth, 1, Toroidal oscillations, J. Geophys. Res., 65, 675, 10.1029/JZ065i002p00675 Gilvarry, 1957, Temperature-dependent equations of state of solids, J. Appl. Phys., 1253, 10.1063/1.1722628 Godin, 1960, The structure of the Earth's crust according to data obtained in regional seismic work in the Southwest Russian Platform, Dokl. Akad. Nauk SSSR, 135, 1123 Goldschmidt, 1931, Zur Kristallchemie des Germaniums, Nachr. Ges. Wiss. Gottengen. Math-physik kl., 1, 184 Green, 1963, Mineral assemblages in a M Model Mantle Composition, J. Geophys. Res., 68, 937, 10.1029/JZ068i003p00937 Gutenberg, 1924, Der Aufbau der Erdkruste auf Grund geophysikalischer Betrachtungen, Z. Geophys., 1, 94 Gutenberg, 1926, Veber Gruppengeschwindigkeit bei Erdbebenwellen, Physik, Z., 27, 111 Gutenberg, 1957, Earthquake energy released at various depths in, Gedenkboek F. A. Vening Meinesz, Verh. konikd. Ned. geol.-mijnb. Genootschap, Geol. Ser., dl., 18, 165 Gutenberg, 1959, The asthenosphere low velocity layer, Ann. di Geofis, 12, 439 Gutenberg, 1954, 310 Haskell, 1953, Dispersion of surface waves on multi-layered media, Bull. Seism. Soc. Am., 43, 17, 10.1785/BSSA0430010017 Helbig, 1958, Elastiche Wellen in Anisotropen Medien, Gerlands Beitrage zur geophysik, 67, 177 Helbig, 1958, Elastiche Wellen in Anisotropen Medien, Gerlands Beitrage zur geophysik, 67, 256 Henry, 1962, Equation of state and conduction bands of iron at high pressures, J. Geophys. Res., 67, 4843, 10.1029/JZ067i012p04843 Herrin, 1962, Regional variations in Pn velocity and their effect on the location of epicenters, Bull. Seism. Soc. of Am., 52, 1037 Hess, 1959, The AMSOC hole to the Earth's mantle, Trans. A.G.U., 40, 340, 10.1029/TR040i004p00340 Hoffman, 1961, Discontinuities in the Earth's upper mantle as indicated by reflected seismic enrgy, Bull. Seism. Soc. Am., 51, 17 Hoskins, 1920, The strain of a gravitating sphere of variable density and elasticity, Trans. Am. Math. Soc., 21, 1, 10.1090/S0002-9947-1920-1501134-4 Jacobs, 1956, The Earth's interior, 1, 10.1007/978-3-642-45855-2_12 Jacobs, 1959, 424 Jeans, 1923, The propagation of earthquake waves, 102, 554 Jeffreys, 1934, The surface waves of earthquakes, Mon. Not. R. Astr. Soc. Geophys. Suppl., 3, 253, 10.1111/j.1365-246X.1935.tb03366.x Jeffreys, 1936, The structure of the Earth down to the 20° discontinuity, Mon. Not. R. Astr. Soc. Geophys. Suppl., 3, 401, 10.1111/j.1365-246X.1936.tb01748.x Jeffreys, 1939, The times of P, S and SKS and the velocities of P and S, Mon. Not. R. Astr. Soc. Geophys. Suppl., 4, 498, 10.1111/j.1365-246X.1939.tb02912.x Jeffreys, 1952, The Earth, 392 Jeffreys, 1954, The times of P in Japanese and European earthquakes, Mon. Not. R. Astr. Soc. Geophys. Suppl., 6, 557, 10.1111/j.1365-246X.1954.tb03039.x Jeffreys, 1939, The times of the core waves, Mon Not. R. Astr. Soc. Geophys. Suppl., 4, 548, 10.1111/j.1365-246X.1939.tb02915.x Jeffreys, 1958, On the interpretation of Pd, Geophys. J., 1, 191, 10.1111/j.1365-246X.1958.tb00052.x Jeffreys, 1939, The Earth, 420 Jeffreys, 1961, Small corrections in the theory of surface waves, Geophys. J., 6, 115, 10.1111/j.1365-246X.1961.tb02965.x Jobert, 1960, Calcul de la dispersion des ondes de Love de grande Periode a la Surface de la Terre, Ann. de Geophys., 16, 393 Jolly, 1956, Investigation of shear waves, Geophysics, 21, 905, 10.1190/1.1438310 Kanai, 1951, On the group velocity of dispersiva surface waves, Bull. Earthquake Res. Inst. Tokyo, 29, 49 Keilis-Borok, 1959, Magnetoelastic waves and the boundary of the Earth's core, Izv. Acad. Nauk SSSR, Ser. Geofiz., 7, 1529 Kovach, 1961, Rayleigh wave dispersion and crustal structure in the Eastern Pacific and Indian Oceans, Geophys. J., 4, 202, 10.1111/j.1365-246X.1961.tb06814.x Kovach, 1962, Long period Love waves in a heterogeneous spherical Earth, J. Geophys. Res., 67, 5243, 10.1029/JZ067i013p05243 Knopoff, 1961, Green's function for eigenvalue problems and the inversion of Love wave dispersion data, Geophys. J., 4, 161, 10.1111/j.1365-246X.1961.tb06811.x Knopoff, 1960, An equation of state for the core of the Earth, Geophys. J., 3, 68, 10.1111/j.1365-246X.1960.tb00066.x Knopoff, 1958, Attenuation of small amplitude stress waves in solids, Rev. Mod. Phys., 1178, 10.1103/RevModPhys.30.1178 Knopoff, 1954, The density of compounds at high pressure and the state of the Earth's interior, J. Geophys. Res., 59, 471, 10.1029/JZ059i004p00471 Kuo, 1962, Rayleigh wave dispersion in the Pacific Ocean for the period range 20 to 140 seconds, Bull. Seism. Soc. Am, 52, 333, 10.1785/BSSA0520020333 Lamb, 1962, The attenuation of waves in a dispersive medium, J. Geoph. Res., 67, 5273, 10.1029/JZ067i013p05273 Lapwood, 1955, Study of a series of Japanese earthquakes, Mon. Not. R. Astr. Soc. Geoph. Suppl., 7, 135, 10.1111/j.1365-246X.1955.tb06559.x Layet, 1961, Some technical aspects of refaction seismic prospecting in the Sahara, Geophysics, 26, 437, 10.1190/1.1438891 Lehmann, 1955, The times of P and S in Northeastern America, Annali di Geofisica, 8, 351 Lehmann, 1959, Velocities of longitudinal waves in the upper part of the Earth's mantle, Annales de Geophysique, 15, 93 Lehmann, 1962, The travel times of the longitudinal waves of the Logan and Blanca atomic explosions and their velocities in the upper mantle, Bull. Seism. Soc. Am., 52, 519, 10.1785/BSSA0520030519 Lehmann, 1961, S and the structure of the upper mantle, Geophys. J., 4, 124, 10.1111/j.1365-246X.1961.tb06808.x Love, 1911 Love, 1944 Lubimova, 1958, Thermal history of the Earth with consideration of the variable thermal conductivity of its mantle, Geophys. J., 1, 115, 10.1111/j.1365-246X.1958.tb00043.x Lubimova, 1961, On the processes of heat transfer in Earth's mantle, Annali di Geofisica, 14, 65 MacDonald, 1958, Chrondrites and the chemical composition of the Earth, 476 MacDonald, 1959, Calculations on the thermal history of the Earth, J. Geophys. Res., 64, 1967, 10.1029/JZ064i011p01967 MacDonald, 1961, Surface heat flow from a differentiated Earth, J. Geophys. Res., 66, 2489, 10.1029/JZ066i008p02489 MacDonald, 1962, On the internal composition of the inner planets, J. Geophys. Res., 67, 2945, 10.1029/JZ067i007p02945 MacDonald, 1961, A study of the free oscillations of the Earth, J. Geophys. Res., 66, 1865, 10.1029/JZ066i006p01865 Mason, 1958, Physical Acoustics and the Properties of Solids Matumoto, 1962, Phase velocity of long-period Rayleigh and Love waves as observed in the Chilean earthquake of May 22, 1960 Miki, 1955, Is the Layer C (413–1000 km) inhomogeneous?, J. of Physics of the Earth, 3, 1, 10.4294/jpe1952.3.1 Murnaghan, 1937, Finite Deformations of An Elastic Solid, Am. J. Math., 59, 235, 10.2307/2371405 Murnaghan, 1951 Musgrave, 1959, The propagation of elastic waves in crystals and other anisotropic media, Rep. Progr. Phys., 22, 74, 10.1088/0034-4885/22/1/303 Neuman, 1930, An analysis of the S wave, Bull. Seism. Soc. Am., 20, 15, 10.1785/BSSA0200010015 Nishimura, 1958, On the nature of the 20° discontinuity in the Earth's mantle, Tellus, 10, 137, 10.1111/j.2153-3490.1958.tb01993.x Nishitake, 1958, On the materials in the Earth's mantle, Mem. Coll. Sci., U. Kyoto, Ser. A, 29, 37 Nishitake, 1958, Elasticity of solids at high pressure and the Earth's mantle, Mem. Coll. Sci., U. Kyoto, Ser. A, 29, 47 Nuttli, 1959, The particle motion of the S wave, Bull. Seism. Soc. Am., 49, 49, 10.1785/BSSA0490010049 Nuttli, 1962, On the determination of the polarization angle of the S wave, Bull. Seism. Soc. Am., 52, 95, 10.1785/BSSA0520010095 Oliver, 1955, Crustal structure and surface wave dispersion IV, Atlantic and Pacific Ocean Basins, Bull. Geol. Soc. Am., 66, 913, 10.1130/0016-7606(1955)66[913:CSASD]2.0.CO;2 Oliver, 1958, Normal modes of continental surface waves, Bull. Seism. Soc. Am., 48, 33, 10.1785/BSSA0480010033 Oliver, 1960, Leaking modes and the PL phase, Bull. Seism. Soc. Am., 50, 165, 10.1785/BSSA0500020165 Pakiser, 1963 Phinney, 1961, Leaking modes in the crustal wave-guide, 1, The oceanic PL Wave, J. Geophys. Res., 66, 1445, 10.1029/JZ066i005p01445 Phinney, 1961, Propagation of leaking interface waves, Bull. Seism. Soc. Am., 51, 527, 10.1785/BSSA0510040527 Postma, 1955, Wave propagation in a stratified medium, Geophysics, 20, 780, 10.1190/1.1438187 Press, 1956, Rigidity of the Earth's core, Science, 124, 1204, 10.1126/science.124.3233.1204 Press, 1951, Propagation of elastic waves in a floating ice sheet, Trans. Am. Geophys. Union, 32, 673, 10.1029/TR032i005p00673 Press, 1961, A fast convenient program for computation of surface wave dispersion curves in multilayered media, Bull. Seism. Soc. Am., 51, 495, 10.1785/BSSA0510040495 Rayleigh, 1885, On waves propagated along the plane surface of an elastic solid, 17, 4 Repetti, 1928, New Values for Some of the Discontinuities in the Earth Ringwood, 1956, The olivine-spinel transition in the Earth's mantle, Nature, 178, 1303, 10.1038/1781303a0 Ringwood, 1958, The constitution of the mantle, 2—Further data on the olivine-spinel transition, Geochim. et Cosmochim. Acta, 15, 18, 10.1016/0016-7037(58)90005-X Ringwood, 1960, Olivine-spinel transition in nickel orthosilicate, Nature, 187, 1019, 10.1038/1871019a0 Ringwood, 1962, A model for the upper mantle, 2, J. Geophys. Res., 67, 4473, 10.1029/JZ067i011p04473 Ringwood, 1962, Mineralogical constitution of the deep mantle, J. Geophys. Res., 67, 4005, 10.1029/JZ067i010p04005 Ringwood, 1962, High-pressure transition of MgGeO3 from pyroxene to corundum structure, J. Geophys. Res., 67, 1690, 10.1029/JZ067i004p01690 Roy, 1954, An experimental study of the formation and properties of synthetic serpentines and related layer silicate minerals, Am. Mineralogist, 39, 957 Rykunov, 1959, P-waves diffracted at the Earth's core and rigidity of the core, Izv. Akad. Nauk SSSR Geophys. Ser., 956 Santô, 1962, Dispersion of Love waves along various paths to Japan (Part 1), Bull. Earthquake Res. Inst. Tokyo, 631 Santô, 1963, Crustal structure of Pacific Ocean area from dispersion of Rayleigh waves, Bull. Seism. Soc. Am., 53, 151 Satô, 1953, Study on surface waves VIII, Bull. Earthquake Res. Inst. Tokyo, 31, 81 Satô, 1955, Analysis of dispersed surface waves by means of Fourier transform, Bull. Earthquake Res. Inst. Tokyo, 33, 34 Satô, 1958, Attenuation dispersion and the wave guide of the G waves, Bull. Seism. Soc. Am., 48, 231, 10.1785/BSSA0480030231 Satô, 1959, Numerical integration of the equation of motion for surface waves in a medium with arbitrary variation of material constants, Bull. Seism. Soc. Am., 49, 57, 10.1785/BSSA0490010057 Savarensky, 1959, On the determination of group and phase velocities from observations, Izv. Akad. Nauk SSSR, Geophys. Ser., 1102 Sclar, 1962, Synthesis and optical crystallography of stishovite, a very high pressure polymorph of SiO2, J. Geophys. Res., 67, 4049, 10.1029/JZ067i010p04049 Shima, 1956, On the variation in bulk modulus/density in the mantle, J. of Physics of the Earth, 4, 7, 10.4294/jpe1952.4.7 Shirokova, 1959, Some facts on the character of the velocity change in the upper layers of the Earth's mantle, Izv. Akad. Nauk SSSR, Geofiz., 1127 Smith, 1961, An investigation of the Earth's free oscillations Smith, 1962, A reinterpretation of phase velocity data based on the GNOME travel-time curves, Bull. Seism. Soc. Am., 52, 1031 Steinhart, 1961, Seismic evidence concerning continental structure, 344 Stishov, 1961, New dense polymorphic modification of silica, Geokhimiya, 10, 837 Stoneley, 1961, The propagation of surface waves in anisotropic Media, 81 Stoneley, 1961, The propagation of surface waves in anisotropic Media, 397 Stoneley, 1949, The seismological implications of aeolotropy in continental structure, Mon. Not. R. Astr. Soc. Geophys. Suppl., 5, 222 Stoneley, 1961, The oscillations of the earth, Vol. 4 Sykes, 1962, Mantle shear velocities determined from oceanic Love and Rayleigh wave dispersion, J. Geophys. Res., 67, 5257, 10.1029/JZ067i013p05257 Synge, 1957, Elastic waves in anisotropic media, J. Math. Phys., 35, 323, 10.1002/sapm1956351323 Takahashi, 1955, Analysis of the dispersion curves of Love waves, Bull. Earthquake Res. Inst. Tokyo, 33, 287 Takahashi, 1957, The dispersion of Rayleigh waves in heterogeneous media, Bull. Earthquake Res. Inst. Tokyo, 35, 297 Takeuchi, 1959, Rayleigh wave evidence for the low velocity zone in the mantle, Bull. Seism. Soc. Am., 49, 355, 10.1785/BSSA0490040355 Takeuchi, 1962, Study of shear velocity distribution in the upper mantle by mantle Rayleigh and Love waves, J. Geophys. Res., 67, 2831, 10.1029/JZ067i007p02831 Takeuchi, 1963 Tams, 1921, Ueber Fortpflangungsgeschwindigkeit der seismischen Oberflachenwellen Langs Kontinentaler und ozeanischer Wege, Zentr. Mineral. Geol. Palaontol., 44 Tams, 1921, Ueber Fortpflangungsgeschwindigkeit der seismischen Oberflachenwellen Langs Kontinentaler und ozeanischer Wege, Zentr. Mineral. Geol. Palaontol., 75 Thomson, 1950, Transmission of plastic waves through a stratified medium, J. Appl. Phys., 21, 89, 10.1063/1.1699629 Toksöz, 1963 Tolstoy, 1953, Dispersive properties of stratified elastic and liquid media; A ray theory, Geophysics, 18, 844, 10.1190/1.1437939 Tozer, 1959, The electrical properties of the Earth's interior, Vol. 3 Tryggvason, 1961, Wave velocity in the upper mantle below the Arctic-Atlantic Ocean and Northwest Europe, Ann. di Geofisica, 14, 379 Uhrig, 1955, Velocity anisotropy in stratified media, Geophysics, 20, 774, 10.1190/1.1438185 Valle, 1949, Sulla Misusa della Velocita di Gruppo delle Onde Sismiche Superficiali, Annali di Geofisica, 2 Valle, 1956, Sur Gradiente di Temperature Necessario per la Formazione di “Low-Velocity Layers”, Ann. Geofis., 9, 371 Vema, 1960, Elasticity of some high-density crystals, J. Geophys. Res., 65, 757, 10.1029/JZ065i002p00757 Vesanen, 1959, New evidence for the existence of Gutenberg's asthenosphere channel, Geophysica, (Helsinki), 7, 1 Vvedenskaya, 1959, Double refraction in the Earth's mantle, Izv. Akad. Nauk. SSSR Ser. Geofiz, 7, 1138 Wadati, 1928, Shallow and deep earthquakes, Geophys. Mag. (Tokyo), 1, 162 Wetherill, 1961, Steady state calculations bearing geological implications of a phase-transition Mohorovicic discontinuity, J. Geophys. Res., 66, 2983, 10.1029/JZ066i009p02983 White, 1955, Elastic wave velocities in laminated media, J. Acoust. Soc. Am., 27, 310, 10.1121/1.1907520 Witte, 1932, Beitrage zur Berechnung Geschwindigkeit der Raumwellan im Erdinnern, Nachr. Ges. Wiss. Göttingen, Math-phys. Kl., 199