Page 241 - Whole Earth Geophysics An Introductory Textbook For Geologists And Geophysicists

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Av PP BecR. «9 GH and Gravity gravity (grav' |< até) n., between masses 2. the force that tends to draw beedies in sphere toward Earth's center. [< ‘isostasy (i sii sta‘ sé) n., and below a compensating depth. gravity and isostasy (grav' até variations in distribution of mass within the gravity Earth’s magnetic and nature materials of strength of direction and a of strength the magnetic

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A and Lillie, the (3rd. pp. and and A. The Oxford
1989, region of R. beneath analysis, Dynamic P. Bailey, tecton- Geophysical D. and Cambridge: 1997.
BabuSka, Geophysics and time The Geology Sons, Inc.. 567 earthquake of earthquakes mid-ocean ridges, Journal Sheriff. Allen. York:

V. thickness in the of Dobrath, lithosphere delay 115, pp. 381-390. 1995, Physical R. Pelton, and J. Hotspot: Contemporary from of E. Geophysics, Press. 860 pp. R. New
and Studies M. seismic Porter, to Journal Mechanism the of Geophysical Research, v.72, pp. 2131-2153. R. C. and
Plomerova, lithosphere 11-21. Babuska, the of from C. S. Introduction ed.). New York: John Wiley and B., R. T. Shuey, Jr, properties data, Research, v. 82, pp. 3665-3676. Geldart, P. Applied University Sich, Earthquakes, Press, 568 pp.

J. of the Carpathians, Structure Rift Geophysical Journal, v. and J.. crustal 1967, nature of faulting on L. M., 1976. K. of
P., Geodesy. v.33, pp. Plomerova, J., V. Cameroon B. Earth: An R. 1977, Yellowstone and acromagnetic R., L. W. Cambridge S.. R. Geology University
PajduSak, model the 1993, Skinner, Smith. ics Sykes, Telford, Keys, Yeats,

Seismology in variations of epi- location of America, 1984, Hager. beneath structure Letters, Seismology of Journal Cambridge: V. J. and (3rd. Acoustics York, New Sons. Global Modern Series Geophysics pp. Press. 52] Plomerova. J. the in lithosphere Carpathian-Pannonian the of Tectonics scismicity. focal 80. y. Bulletin,

Earthquake Regional 1962, the on Seismological Society B. H. image of mantle California, Geophysical Research 1968, R. Sykes, tectonics, ed.). (6th Earth Press. Coppens. B. A. of Fundamentals and Wiley 1995, and BabuSka. the of region. Tectonophysics. v. 23 pp. 215-235. 1969, Sykes. from regions America of

7 E., and J. Taggart, their effect R. W. Clayton, and L. Oliver, and global new Geophysical Research, v.73. pp. 5855-5899. The 1976. University Frey. R. A. 1982, John York: Wallace, C. T. International Number 58, New York: Academic Bielik, V. modeling Alpine-Western R. L. America Society
Chapter velocity and Bulletin 1037. E.. tomographic southern v.11, pp. 625-627. the H.. Cambridge E.. L. Sanders, New and Seismology. M. J., R. Gravity Eastern and P.. Middle Geological 1639-1684.

222 Herrin, Pn centers. v.52. p. Humphreys, A Isaacs, B., J. and Jeffreys. Kinsler, ed.), 480 pp. T.. Lay, Lillie, 1994, Basin Molnar, pp.