Isostatic compensation for a portion of the Southern Appalachians: Evidence from a reconnaissance study using wide-angle, three-component seismic soundings

Bulletin of the Geological Society of America

Volumn 124, Issue 3-4, 2012, Pages 291-317

  Hawman, Robert B ^a   Khalifa, Mohamed O ^b   Baker, M Scott ^c  

^a UNIVERSITY OF GEORGIA   (United States)

^b SOUTH VALLEY UNIVERSITY   (Egypt)

^c UNIVERSITY OF MIAMI   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

APPALACHIANS; BLUE RIDGES; BROADBAND STATION; CAROLINAS; COASTAL PLAIN; CRUSTAL THICKNESS; EFFECTIVE ELASTIC THICKNESS; GRAVITY DATA; GRAVITY GRADIENTS; INNER PIEDMONT; ISOSTATIC COMPENSATION; LOWER BOUNDS; MOHO DEPTH; RECEIVER FUNCTIONS; SIMILAR PATTERN; TEST MODELS; THREE-COMPONENT; WIDE-ANGLE REFLECTION;

BUILDINGS; LANDFORMS; SURFACE TOPOGRAPHY; TECTONICS;

STRUCTURAL GEOLOGY;

COASTAL PLAIN; CRUSTAL ROOT; CRUSTAL THICKNESS; ISOSTASY; LITHOSPHERE; MANTLE; MOHO; NUMERICAL MODEL; OROGENY; P-WAVE; SEISMIC MIGRATION; SEISMIC REFLECTION; SH-WAVE; TOPOGRAPHY;

APPALACHIANS;

EID: 84863508306     PISSN: 00167606     EISSN: 19432674     Source Type: Journal    
DOI: 10.1130/B30464.1     Document Type: Article

References (96)

1. Armstrong, G.D., and Watts, A.B., 2001, Spatial variations in Te in the southern Appalachians, eastern United States: Journal of Geophysical Research, v. 106, p. 22,009-22,026.
2. BABEL Working Group, 1990, Evidence for Early Proterozoic plate tectonics from seismic reflection profiles in the Baltic Shield: Nature, v. 348, p. 34-38, doi:10.1038/348034a0.
3. Baker, M.S., 2006, Investigation of the Crust and Uppermost Mantle in the Carolina Terrane and Blue Ridge, Southern Appalachians, Using Receiver Function Analysis of Broadband Earthquake Data [M.S. thesis]: Athens, Georgia, University of Georgia, 93 p.
4. Baker, M.S., and Hawman, R.B., 2006, Combined wide-angle reflection and receiver function studies of the crust and upper mantle beneath the Carolina terrane and Blue Ridge provinces, Southern Appalachians, in Eighteenth Annual Incorporated Research Institutions for Seismology Workshop, June 8-10: Tucson, Arizona, p. 73.
5. Baker, M.S., and Hawman, R.B., 2007, Structure of the crust and upper mantle in the Southern Appalachians from receiver function analysis: Geological Society of America Abstracts with Programs, v. 39, no. 2, p. 21.
6. Bechtel, T.D., Forsyth, D.W., Sharpton, V.L., and Grieve, R.A.F., 1990, Variations in effective elastic thickness of the North American lithosphere: Nature, v. 343, p. 636-638, doi:10.1038/343636a0.
7. Bedle, H., and van der Lee, S., 2009, S velocity variations beneath North America: Journal of Geophysical Research, v. 114, p. B07308, doi:10.1029/2008JB005949.
8. Behrendt, J.C., 1986, Structural interpretation of multichannel seismic reflection profiles crossing the southeastern United States and the adjacent continental margin-Décollements, faults, Triassic (?) basins and Moho reflections, in Barazangi, M., and Brown, L., eds., Reflection Seismology: The Continental Crust: American Geophysical Union Geodynamics Monograph 14, p. 201-213.
9. Berzin, R., Oncken, O., Knapp, J.H., Perez-Estaun, A., Hismatulin, T., Yunuzov, N., and Lipilin, A., 1996, Orogenic evolution of the Ural Mountains: Results from an integrated seismic experiment: Science, v. 274, p. 220-221, doi:10.1126/science.274.5285.220.
10. Bois, C., Cazes, M., Damotte, B., Galdeano, A., Hirn, A., Mascle, A., Matte, P., Raoult, J.F., and Torreilles, G., 1986, Deep seismic profiling of the crust in northern France: The ECORS project, in Barazangi, M., and Brown, L., Reflection Profiling: A Global Perspective: American Geophysical Union Geodynamics Monograph 13, p. 21-29.
11. Bollinger, G.A., 1970, Travel-time study of six central Appalachian earthquakes: Bulletin of the Seismological Society of America, v. 60, p. 629-637.
12. Carbonell, R., Perez-Estaun, A., Gallart, J., Diaz, J., Kashubin, S., Mechie, J., Stadtlander, R., Schulze, A., Knapp, J.H., and Morozov, A., 1996, Crustal root beneath the Urals: Wide-angle seismic evidence: Science, v. 274, p. 222-224, doi:10.1126/science.274.5285.222.
13. Carbonell, R., Gallart, J., Perez-Estaun, A., Diaz, J., Kashubin, S., Mechie, J., Wenzel, F., and Knapp, J., 2000, Seismic wide-angle constraints on the crust of the southern Urals: Journal of Geophysical Research, v. 105, p. 13,755-13,777, doi:10.1029/2000JB900048.
14. Carts, D.A., and Bollinger, G.A., 1981, A regional crustal velocity model for the southeastern United States: Bulletin of the Seismological Society of America, v. 71, p. 1829-1847.
15. Christensen, N.I., 1996, Poisson's ratio and crustal seismology: Journal of Geophysical Research, v. 101, p. 3139-3156, doi:10.1029/95JB03446.
16. Christensen, N.I., and Mooney, W.D., 1995, Seismic velocity structure and composition of the continental crust: A global view: Journal of Geophysical Research, v. 100, p. 9761-9788, doi:10.1029/95JB00259.
17. Clark, H.B., Costain, J.K., and Glover, L., 1978, Structural and seismic reflection studies of the Brevard ductile deformation zone near Rosman, North Carolina: American Journal of Science, v. 278, p. 419-441, doi:10.2475/ajs.278.4.419.
18. Cook, F.A., 1984a, Geophysical anomalies along strike of the Southern Appalachian Piedmont: Tectonics, v. 3, p. 45-61, doi:10.1029/TC003i001p00045.
19. Cook, F.A., 1984b, Towards an understanding of the Southern Appalachian Piedmont crustal transition-A multidisciplinary approach: Tectonophysics, v. 109, p. 77-92, doi:10.1016/0040-1951(84)90171-9.
20. Cook, F.A., and Oliver, J.E., 1981, The late Precambrian-early Paleozoic continental edge in the Appalachian orogen: American Journal of Science, v. 281, p. 993-1008, doi:10.2475/ajs.281.8.993.
21. Cook, F.A., and Vasudevan, K., 2006, Reprocessing and enhanced interpretation of the initial COCORP Southern Appalachians traverse: Tectonophysics, v. 420, p. 161-174, doi:10.1016/j.tecto.2006.01.022.
22. Cook, F.A., Albaugh, D.S., Brown, L.D., Kaufman, S., Oliver, J.E., and Hatcher, R.D., Jr., 1979, Thin-skinned tectonics in the crystalline Southern Appalachians: COCORP seismic reflection profiling of the Blue Ridge and Piedmont: Geology, v. 7, p. 563-567, doi:10.1130/0091-7613(1979)7<563:TTITCS>2.0.CO;2.
23. Cook, F.A., Brown, L.D., Kaufman, S., Oliver, J.E., and Petersen, T.A., 1981, COCORP seismic profiling of the Appalachian orogen beneath the coastal plain of Georgia: Geological Society of America Bulletin, v. 92, p. 738-748, doi:10.1130/0016-7606(1981)92 <738:CSPOTA>2.0.CO;2.
24. Coruh, C., Costain, J.K., Hatcher, R.D., Jr., Pratt, T.L., Williams, R.T., and Phinney, R.A., 1987, Results from regional Vibroseis profiling: Appalachian ultra-deep core hole site study: Geophysical Journal of the Royal Astronomical Society, v. 89, p. 147-156.
25. Costain, J.K., Hatcher, R.D., Jr., and Coruh, C., 1989, Appalachian Ultradeep Core Hole (ADCOH) project site investigation: Regional seismic lines and geologic interpretation, in Hatcher, R.D., Jr., Thomas, W.A., and Viele, G.W., eds., The Appalachian-Ouachita Orogen in the United States: Boulder, Colorado, Geological Society of America, The Geology of North America, v. F-2, plate 12.
26. Dallmeyer, R.D., 1989, Late Paleozoic thermal evolution of crystalline terranes within portions of the U.S. Appalachian orogen, in Hatcher, R.D., Jr., Thomas, W.A., and Viele, G.W., eds., The Appalachian-Ouachita Orogen in the United States: Boulder, Colorado, Geological Society of America, The Geology of North America, v. F-2, p. 417-444.
27. Dennis, A.J., and Wright, J.E., 1997, The Carolina terrane in northwestern South Carolina, U.S.A.: Late Precambrian-Cambrian deformation and metamorphism in a peri-Gondwanan oceanic arc: Tectonics, v. 16, p. 460-473, doi:10.1029/97TC00449.
28. Dorman, L.M., 1972, Seismic crustal anisotropy in northern Georgia: Bulletin of the Seismological Society of America, v. 62, p. 39-45.
29. Druzhinin, V.S., Kashubin, S.N., Kachubina, T.V., Kolmogorova, V.A., Parygin, G.V., Rybalka, A.V., and Tiunova, A.M., 1997, The main features of the interface between the crust and the upper mantle in the mid-Urals (in the vicinity of the deep drillhole SG-4): Tectonophysics, v. 269, p. 259-267, doi:10.1016/S0040-1951(96)00163-1.
30. Echtler, H.P., Stiller, M., Steinhoff, F., Krawczyk, C., Suleimanov, A., Spridonov, V., Knapp, J.H., Menshikov, Y., Alvarez-Marron, J., and Yunosov, N., 1996, Preserved collisional crustal structure of the southern Urals revealed by Vibroseis profiling: Science, v. 274, p. 224-226, doi:10.1126/science.274.5285.224.
31. Edelman, S.H., Liu, A., and Hatcher, R.D., 1987, The Brevard zone in South Carolina and adjacent areas: An Alleghanian orogen-scale dextral shear zone reactivated as a thrust fault: The Journal of Geology, v. 95, p. 793-806, doi:10.1086/629178.
32. Favret, P.D., and Williams, R.T., 1988, Basement beneath the Blue Ridge and Inner Piedmont in northeastern Georgia and the Carolinas: A preserved, late Proterozoic, rifted continental margin: Geological Society of America Bulletin, v. 100, p. 1999-2007, doi:10.1130/0016-7606(1988)100<1999:BBTBRA>2.3.CO;2.
33. Fischer, K.M., 2002, Waning buoyancy in the crustal roots of old mountains: Nature, v. 417, p. 933-936, doi:10.1038/nature00855.
34. French, S.W., Fischer, K.M., Syracuse, E.M., and Wysession, M.E., 2009, Crustal structure beneath the Florida-to-Edmonton broadband seismometer array: Geophysical Research Letters, v. 36, L08309, 6 p.
35. Griffin, V.S., 1971, The Inner Piedmont belt of the southern crystalline Appalachians: Geological Society of America Bulletin, v. 82, p. 1885-1898, doi:10.1130/0016-7606(1971)82[1885:TIPBOT]2.0.CO;2.
36. Hames, W.E., Renne, P.R., and Ruppel, C., 2000, New evidence for geologically instantaneous emplacement of earliest Jurassic Central Atlantic magmatic province basalts on the North American margin: Geology, v. 28, p. 859-862, doi:10.1130/0091-7613(2000)28 <859:NEFGIE>2.0.CO;2.
37. Harris, L.D., and Bayer, D.C., 1979, Sequential development of the Appalachian orogen above a master décollement-A hypothesis: Geology, v. 7, p. 568-572, doi:10.1130/0091-7613(1979)7<568:SDOTAO> 2.0.CO;2.
38. Hatcher, R.D., Jr., 1971, Stratigraphic, petrologic, and structural evidence favoring a thrust solution to the Brevard problem: American Journal of Science, v. 270, p. 177-202, doi:10.2475/ajs.270.3.177.
39. Hatcher, R.D., Jr., 1989, Tectonic synthesis of the U.S. Appalachians, in Hatcher, R.D., Jr., Thomas, W.A., and Viele, G.W., eds., The Appalachian-Ouachita Orogen in the United States: Boulder, Colorado, Geological Society of America, The Geology of North America, v. F-2, p. 511-535.
40. Hatcher, R.D., Jr., 2002, The Alleghanian (Appalachian) orogeny, a product of zipper tectonics: Rotational transpressive continent-continent collision and closing of ancient oceans along irregular margins, in Martinez Catalan, J.R., Hatcher, R.D., Jr., Arenas, R., and Garcia, F.D., eds., Variscan-Appalachian Dynamics: The Building of the Late Paleozoic Basement: Geological Society of America Special Paper 394, p. 199-208.
41. Hatcher, R.D., Jr., 2010, The Appalachian orogen: A brief summary, in Tollo, R.P., Bartholomew, M.J., Hibbard, J.P., and Karabinos, P.M., eds., From Rodinia to Pangea: The Lithotectonic Record of the Appalachian Region: Geological Society of America Memoir 206, p. 1-19.
42. Hatcher, R.D., Jr., Butler, J.R., Fullager, P.D., Secor, D.T., and Snoke, A.W., 1980, Geologic synthesis of the Tennessee-Carolinas-northeast Georgia Southern Appalachians, in Wones, D.R., ed., The Caledonides in the U.S.A.: Virginia Polytechnical Institute Department of Geological Sciences Memoir 2, p. 83-90.
43. Hatcher, R.D., Jr., Costain, J.K., Coruh, C., Phinney, R.A., and Williams, R.T., 1987, Tectonic implications of new Appalachian Ultradeep Core Hole (ADCOH) seismic reflection data from the crystalline Southern Appalachians: Geophysical Journal of the Royal Astronomical Society, v. 89, p. 157-162.
44. Hatcher, R.D., Jr., Bream, B.R., and Merschat, A.J., 2007, Tectonic map of the Southern and Central Appalachians: A tale of three orogens and a complete Wilson cycle, in Hatcher, R.D., Jr., Carlson, M.P., McBride, J.H., and Martinez Catalan, J.R., eds., 4-D Framework of Continental Crust: Geological Society of America Memoir 200, p. 595-632.
45. Hawman, R.B., 1996, Wide-angle, three-component seismic reflection profiling of the crust beneath the East Coast gravity high, Southern Appalachians, using quarry blasts: Journal of Geophysical Research, v. 101, p. 13,933-13,945, doi:10.1029/96JB00792.
46. Hawman, R.B., 2004, Using delay-fired quarry blasts to image the crust: A comparison of methods for deconvolving mixed-delay source wavelets: Bulletin of the Seismological Society of America, v. 94, p. 1476-1491, doi:10.1785/012003209.
47. Hawman, R.B., 2008, Crustal thickness variations across the Blue Ridge Mountains, Southern Appalachians: An alternative procedure for migrating wide-angle reflection data: Bulletin of the Seismological Society of America, v. 98, p. 469-475, doi:10.1785/0120070027.
48. Henstock, T.J., Levander, A., Snelson, C.M., Keller, G.R., Miller, K.C., Harder, S.H., Gorman, A.R., Clowes, R.M., Burianyk, M.J.A., and Humphreys, E.D., 1998, Probing the Archean and Proterozoic lithosphere of western North America: GSA Today, v. 8, no. 1, p. 1-5 and 16-17.
49. Hibbard, J.P., Stoddard, E.F., Secor, D.T., and Dennis, A.J., 2002, The Carolina zone: Overview of Neoproterozoic to early Paleozoic peri-Gondwanan terranes along the eastern flank of the Southern Appalachians: Earth-Science Reviews, v. 57, p. 299-339, doi:10.1016/S0012-8252(01)00079-4.
50. Hubbard, S.S., Coruh, C., and Costain, J.K., 1991, Paleozoic and Grenvillian structures in the Southern Appalachians: Extended interpretation of seismic reflection data: Tectonics, v. 10, p. 141-170, doi:10.1029/90TC01854.
51. Hutchinson, D.R., Grow, J.A., and Klitgord, K.D., 1983, Crustal structure beneath the Southern Appalachians: Nonuniqueness of gravity modeling: Geology, v. 11, p. 611-615, doi:10.1130/0091-7613(1983)11 <611:CSBTSA>2.0.CO;2.
52. Iverson, W.P., and Smithson, S.B., 1982, Master décollement root zone beneath the Southern Appalachians and crustal balance: Geology, v. 10, p. 241-245, doi:10.1130/0091-7613(1982)10<241:MDRZBT>2.0.CO;2.
53. James, D.E., Smith, T.J., and Steinhart, J.S., 1968, Crustal structure of the Middle Atlantic states: Journal of Geophysical Research, v. 73, p. 1983-2007, doi:10.1029/JB073i006p01983.
54. Jones, C.H., and Phinney, R.A., 1998, Seismic structure of the lithosphere from teleseismic converted arrivals observed at small arrays in the southern Sierra Nevada and vicinity, California: Journal of Geophysical Research, v. 103, p. 10,065-10,090, doi:10.1029/97JB03540.
55. Jones, C.H., Kanamori, H., and Roecker, S.W., 1994, Missing roots and mantle "drips": Regional Pn and teleseismic arrival times in the southern Sierra Nevada and vicinity, California: Journal of Geophysical Research, v. 99, p. 4567-4601, doi:10.1029/93JB01232.
56. Karner, G.D., and Watts, A.B., 1983, Gravity anomalies and flexure of the lithosphere at mountain ranges: Journal of Geophysical Research, v. 88, p. 10,449-10,477, doi:10.1029/JB088iB12p10449.
57. Kean, A.E., and Long, L.T., 1980, A seismic refraction line along the axis of the southern Piedmont and crustal thicknesses in the southeastern United States: Earthquake Notes, v. 51, p. 3-13.
58. Khalifa, M.O., 2002, Wide-Angle Seismic Reflection Studies of the Elberton Granite and Carolina Terrane, Southern Appalachians, northeast Georgia [Ph.D. thesis]: Athens, Georgia, University of Georgia, 297 p.
59. King, P.B., 1961, Systematic pattern of Triassic dikes in the Appalachian region: U.S. Geological Survey Professional Paper 424-B, p. B93-B95.
60. Klitgord, K.D., Hutchinson, D.R., and Schouten, H., 1988, U.S. Atlantic continental margin: Structural and tectonic framework, in Sheridan, R.E., and Grow, J.A., eds., The Atlantic Continental Margin: U.S.: Boulder, Colorado, Geological Society of America, The Geology of North America, v. I-2, p. 19-55.
61. Knapp, J.H., Diaconescu, C.C., Bader, M.A., Sokolov, V.B., Kashubin, S.N., and Rybalka, A.V., 1998, Seismic reflection fabrics of continental collision and postorogenic extension in the Middle Urals, central Russia: Tectonophysics, v. 288, p. 115-126, doi:10.1016/S0040-1951(97)00288-6.
62. Kruse, S., and McNutt, M., 1988, Compensation of Paleozoic orogens: A comparison of the Urals to the Appalachians: Tectonophysics, v. 154, p. 1-17, doi:10.1016/0040-1951(88)90224-7.
63. Lewis, J.L., Day, S.M., Magistrale, H., Castro, R.R., Astiz, L., Rebollar, C., Eakins, J., Vernon, F.L., and Brune, J.N., 2001, Crustal thickness of the Peninsular Ranges and Gulf extensional province in the Californias: Journal of Geophysical Research, v. 106, p. 13,599-13,611, doi:10.1029/2001JB000178.
64. Lewry, J.F., Hajnal, Z., Green, A., Lucas, S.B., White, D., Stauffer, M.R., Ashton, K.E., Weber, W., and Clowes, R., 1994, Structure of a Paleoproterozoic continentcontinent collision zone: A Lithoprobe seismic reflection profile across the Trans-Hudson orogen, Canada, in Clowes, R.M., and Green, A.G., eds., Seismic Reflection Probing of the Continents and Their Margins: Tectonophysics, v. 232, p. 143-160.
65. Long, L.T., and Dainty, A.M., 1985, Studies of gravity anomalies in Georgia and adjacent areas of the southeastern United States, in Hinze, W.J., ed., The Utility of Regional Gravity and Magnetic Anomaly Maps: Tulsa, Oklahoma, Society of Exploration Geophysicists, p. 308-319.
66. Long, L.T., and Mathur, U.P., 1972, Southern Appalachian crustal structure from the dispersion of Rayleigh waves and refraction data: Earthquake Notes, v. 43, p. 31-40.
67. Luetgert, J.H., Benz, H.M., and Madabhushi, S., 1994, Crustal structure beneath the Atlantic Coastal Plain of South Carolina: Seismological Research Letters, v. 65, p. 180-191.
68. Manspeizer, W., DeBoer, J., Costain, J.K., Froelich, A.J., Coruh, C., Olsen, P.E., McHone, G.J., Puffer, J.H., and Prowell, D.C., 1989, Post-Paleozoic activity, in Hatcher, R.D., Jr., Thomas, W.A., and Viele, G.W., eds., The Appalachian-Ouachita Orogen in the United States: Boulder, Colorado, Geological Society of America, The Geology of North America, v. F-2, p. 319-374.
69. Matthews, D.H., and Cheadle, M.J., 1986, Deep reflections from the Caledonides and Variscides west of Britain and comparison with the Himalayas, in Barazangi, M., and Brown, L., eds., Reflection Profiling: A Global Perspective: American Geophysical Union Geodynamics Monograph 13, p. 5-19.
70. McBride, J.H., and Nelson, K.D., 1988, Integration of COCORP deep reflection and magnetic anomaly analy sis in the southeastern United States: Implications for origin of the Brunswick and East Coast magnetic anomalies: Geological Society of America Bulletin, v. 100, p. 436-445, doi:10.1130/0016-7606(1988)100 <0436:IOCDRA>2.3.CO;2.
71. McBride, J.H., and Nelson, K.D., 1991, Deep seismic reflection constraints on Paleozoic crustal structure and definition of the Moho in the buried Southern Appalachian orogen, in Meissner, R., Brown, L., Durbaum, H., Franke, W., Fuchs, K., and Seifert, F., eds., Continental Lithosphere: Deep Seismic Reflections: American Geophysical Union Geodynamics Monograph 22, p. 9-20.
72. McKenzie, D., and Fairhead, D., 1997, Estimates of the effec tive elastic thickness of the continental lithosphere from Bouguer and free air gravity anomalies: Journal of Geophysical Research, v. 102, p. 27,523-27,552, doi:10.1029/97JB02481.
73. Meissner, R., and the DEKORP Research Group, 1991, The DEKORP surveys: Major achievements for tectonic and reflective styles, in Meissner, R., Brown, L., Durbaum, H., Franke, W., Fuchs, K., and Seifert, F., eds., Continental Lithosphere: Deep Seismic Reflections: American Geophysical Union Geodynamics Monograph 22, p. 69-76.
74. Mele, G., and Sandvol, E., 2003, Deep crustal roots beneath the Northern Apennines inferred from teleseismic receiver functions: Earth and Planetary Science Letters, v. 211, p. 69-78, doi:10.1016/S0012-821X(03)00185-7.
75. Merschat, A.J., and Hatcher, R.D., Jr., 2007, The Cat Square terrane: Possible Siluro-Devonian remnant ocean basin in the Inner Piedmont, Southern Appalachians, USA, in Hatcher, R.D., Jr., Carlson, M.P., McBride, J.H., and Martinez Catalan, J.R., eds., 4-D Framework of Continental Crust: Geological Society of America Memoir 200, p. 553-565.
76. Merschat, A.J., Hatcher, R.D., Jr., and Davis, T.L., 2005, The northern Inner Piedmont, Southern Appalachians, USA: Kinematics of transpression and SW-directed mid-crustal flow: Journal of Structural Geology, v. 27, p. 1252-1281, doi:10.1016/j.jsg.2004.08.005.
77. Nettles, M., and Dziewonski, A.M., 2008, Radially anisotropic shear velocity structure of the upper mantle globally and beneath North America: Journal of Geophysical Research, v. 113, p. B02303, doi:10.1029/2006JB004819.
78. Phinney, R.A., and Roy-Chowdhury, K., 1989, Reflection seismic studies of crustal structure in the eastern United States, in Pakiser, L.C., and Mooney, W.D., eds., Geophysical Framework of the Continental United States: Geological Society of America Memoir 172, p. 613-653.
79. Prodehl, C., Schlittenhardt, J., and Stewart, S.W., 1984, Crustal structure of the Appalachian Highlands in Tennessee: Tectonophysics, v. 109, p. 61-76, doi:10.1016/0040-1951(84)90170-7.
80. Prowell, D.C., 1988, Cretaceous and Cenozoic tectonism on the Atlantic coastal margin, in Sheridan, R.E., and Grow, J.A., eds., The Atlantic Continental Margin: U.S.: Boulder, Colorado, Geological Society of America, The Geology of North America, v. I-2, p. 557-564.
81. Schlische, R.W., Withjack, M.O., and Olsen, P.E., 2003, Relative timing of CAMP, rifting, continental breakup, and basin inversion: Tectonic significance, in Hames, W., McHone, J.G., Renne, P., and Ruppel, C., eds., The Central Atlantic Magmatic Province: Insights from Fragments of Pangea: American Geophysical Union Geophysical Monograph 136, p. 33-59.
82. Secor, D.T., Snoke, A.W., and Dallmeyer, R.D., 1986, Character of the Alleghanian orogeny in the Southern Appalachians: III. Regional tectonic relations: Geological Society of America Bulletin, v. 97, p. 1345-1353, doi:10.1130/0016-7606(1986)97<1345:COTAOI> 2.0.CO;2.
83. Sheehan, A.F., Abers, G.A., Jones, C.H., and Lerner-Lam, A.L., 1995, Crustal thickness variations across the Colorado Rocky Mountains from teleseismic receiver functions: Journal of Geophysical Research, v. 100, p. 20,391-20,404.
84. Society of Exploration Geophysicists, 1982, Gravity Anomaly Map of the United States: Tulsa, Oklahoma, Society of Exploration Geophysicists, scale 1:2,500,000, 2 sheets
85. Stewart, J., and Watts, A.B., 1997, Gravity anomalies and spatial variations of flexural rigidity at mountain ranges: Journal of Geophysical Research, v. 102, p. 5327-5352, doi:10.1029/96JB03664.
86. Taylor, S.R., 1989, Geophysical framework of the Appalachians and adjacent Grenville Province, in Pakiser, L.C., and Mooney, W.D., eds., Geophysical Framework of the Continental United States: Geological Society of America Memoir 172, p. 317-348.
87. Thomas, M.D., 1983, Tectonic significance of paired gravity anomalies in the Southern and Central Appalachians, in Hatcher, R.D., Jr., Williams, H., and Zietz, I., eds., Contributions to the Tectonics and Geophysics of Mountain Chains: Geological Society of America Memoir 158, p. 113-124.
88. Thouvenot, F., Kashubin, S., Poupinet, G., Makovskiy, V.V., Kashubina, T.V., Matte, Ph., and Jenatton, L., 1995, The root of the Urals: Evidence from wide-angle reflection seismic: Tectonophysics, v. 250, p. 1-13, doi:10.1016/0040-1951(95)00058-8.
89. Turcotte, D.S., and Schubert, G., 1982, Geodynamics: Applications of Continuum Physics to Geological Problems: New York, John Wiley & Sons, Inc., 450 p.
90. U.S. Geological Survey, 1996, GTOPO30: Global 30 Arc-Second Elevation Data Set: http://eros.usgs.gov/#/Find_Data/Products_and_Data_Available/gtopo30_info/.
91. Vauchez, A., 1987, Brevard fault zone, Southern Appa lachians: A medium-angle, dextral, Alleghanian shear zone: Geology, v. 15, p. 669-672, doi:10.1130/0091-7613(1987)15 <669:BFZSAA>2.0.CO;2.
92. Wagner, L.S., and Metcalf, K., 2010, Crustal structure beneath the central North Carolina-Tennessee Blue Ridge Mountains: Geological Society of America Abstracts with Programs, v. 42, no. 1, p. 139.
93. Whitney, J.A., Paris, T.A., Carpenter, R.H., and Hartley, M.E., 1978, Volcanic evolution of the southern Slate Belt of Georgia and South Carolina: A primitive oceanic island arc: The Journal of Geology, v. 86, p. 173-192, doi:10.1086/649673.
94. Zandt, G., Gilbert, H., Owens, T.J., Ducea, M., and Saleeby, J., 2004, Active foundering of a continental arc root beneath the southern Sierra Nevada in California: Nature, v. 431, p. 41-46, doi:10.1038/nature02847.
95. Zelt, C.A., and Smith, R.B., 1992, Seismic traveltime inversion for 2-D crustal velocity structure: Geophysical Journal International, v. 108, p. 16-34, doi:10.1111/j.1365-246X.1992.tb00836.x.
96. Zhu, L., and Kanamori, H., 2000, Moho depth variations in southern California from teleseismic receiver functions: Journal of Geophysical Research, v. 105, p. 2969-2980, doi:10.1029/1999JB900322.