Permian-Jurassic growth and amalgamation of the Wallowa composite terrane, northeastern Oregon

Special Paper of the Geological Society of America

Volumn 410, Issue , 2006, Pages 465-494

  Kays, M Allan ^a   Stimac, John P ^b   Goebel, Patti M ^a  

^a UNIVERSITY OF OREGON   (United States)

^b EASTERN ILLINOIS UNIVERSITY   (United States)

Author keywords

Baker terrane; Blue mountains province; Blueschist; Greenschist; Jurassic; Northeastern oregon; Olds ferry terrane; Permian; Petrochemistry; Static metamorphism; Superposed deformation; Triassic; Wallowa terrane

Indexed keywords

DEFORMATION; LANDFORMS; METALS; SEDIMENTARY ROCKS; STRUCTURAL GEOLOGY;

BAKER TERRANE; BLUE MOUNTAIN; BLUESCHISTS; GREENSCHIST; JURASSIC; NORTHEASTERN OREGON; OLDS FERRY TERRANE; PERMIAN; PETROCHEMISTRY; STATIC METAMORPHISM; TRIASSIC; WALLOWA TERRANE;

FAULTING;

BLUESCHIST; FOLIATION; GEOCHEMISTRY; GREENSCHIST; HYDROTHERMAL ALTERATION; ISLAND ARC; JURASSIC; MELANGE; MYLONITE; OCEANIC LITHOSPHERE; PERMIAN; SUBDUCTION; TERRANE; THRUST FAULT; TRIASSIC; VOLCANISM;

BLUE MOUNTAINS [UNITED STATES]; OREGON; UNITED STATES; WALLOWA MOUNTAINS;

WALLOWA TERRANE;

EID: 73949111747     PISSN: 00721077     EISSN: None     Source Type: Book Series    
DOI: 10.1130/2006.2410(23)     Document Type: Article

References (99)

1. Alt, J.C., Laverne, C., and Muehlenbachs, K., 1985, Alteration of the upper oceanic crust: Mineralogy and processes in deep sea drilling project hole 504b, leg 83, in Anderson, R.N., et al., eds., Initial reports of the Deep Sea Drilling Project, volume 83: Washington, D.C., U.S. Government Printing Office, p. 217-241.
2. Amstutz, G.C., 1968, Spilites and spilitic rocks, in Hess, H.H., and Poldervaart, A., eds., Basalts-The Poldervaart treatise on rocks of basaltic composition, volume 2: New York, Interscience Publishers, p. 737-753.
3. Ando, C.J., Irwin, W.P., Jones, D.L., and Saleeby, J.B., 1983, The ophiolitic North Fork terrane in the Salmon River region, central Klamath Mountains, California: Geological Society of America Bulletin, v. 94, p. 236-252, doi: 10.1130/0016-7606(1983)94<236:TONFTI>2.0.CO;2.
4. Armstrong, R.L., Taubeneck, W.H., and Hales, P.O., 1977, Rb-Sr and K-Ar geochronometry of Mesozoic granitic rocks and their Sr isotopic composition, Oregon, Washington, and Idaho: Geological Society of America Bulletin, v. 88, p. 397-411, doi: 10.1130/0016-7606(1977)88<397: RAKGOM>2.0.CO;2.
5. Ashley, R.P., 1967, Metamorphic petrology and structure of the Burnt River Canyon area, northeastern Oregon [Ph.D. dissertation]: Stanford, California, Stanford University, 236 p.
6. Ashley, R.P., 1995, Petrology and deformation history of the Burnt River Schist and associated plutonic rocks in the Burnt River Canyon area, northeastern Oregon, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 457-495.
7. Avé Lallemant, H.G., 1976, Structure of the Canyon Mountain (ophiolite) Complex (Oregon) and its implication for sea-floor spreading: Boulder, Colorado, Geological Society of America Special Paper 173, 49 p.
8. Avé Lallemant, H.G., 1995, Pre-Cretaceous tectonic evolution of the Blue Mountains province, northeastern Oregon, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 271-304.
9. 39 Ar ages of some pre-Tertiary plutonic and metamorphic rocks of eastern Oregon and their geologic relationships: Geology, v. 8, p. 371-374, doi: 10.1130/0091- 7613(1980)8<371:AAOSPP>2.0.CO;2.
10. Avé Lallemant, H.G., Schmidt, W.J., and Kraft, J.L., 1985, Major Late Triassic strike-slip displacement in the Seven Devils terrane, Oregon and Idaho- A result of left-oblique convergence? Tectonophysics, v. 119, p. 299-328, doi: 10.1016/0040-1951(85)90044-7.
11. 39 Ar ages and REE geochemistry of basement terranes in the Snake River Canyon, northeastern Oregon-western Idaho [M.S. thesis]: Columbus, Ohio State University, 111 p.
12. Bishop, E.M., 1995a, High-pressure, low-temperature schistose rocks of the Baker terrane, northeastern Oregon, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 211-219.
13. Bishop, E.M., 1995b, Mafic and ultramafic rocks of the Baker terrane, eastern Oregon, and their implications for terrane origin, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 221-245.
14. Blome, C.D., and Nestell, M.K., 1991, Evolution of a Permo-Triassic sedimentary mélange, Grindstone terrane, east-central Oregon: Geological Society of America Bulletin, v. 103, p. 1280-1296, doi: 10.1130/0016- 7606(1991)103<1280:EOAPTS>2.3.CO;2.
15. Blome, C.D., Jones, D.L., Murchey, B.L., and Liniecki, M., 1986, Geologic implications of radiolarian-bearing Paleozoic and Mesozoic rocks from the Blue Mountains Province, eastern Oregon, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Geologic implications of Paleozoic and Mesozoic paleontology and biostratigraphy, Blue Mountains Province, Oregon and Idaho: Reston, Virginia, U.S. Geological Survey Professional Paper 1435, p. 79-101.
16. Bostwick, D.A., and Koch, G.S., 1962, Permian and Triassic rocks of northeastern Oregon: Geological Society of America Bulletin, v. 73, p. 419-422.
17. Brooks, H.C., and Vallier, T.L., 1978, Mesozoic rocks and tectonic evolution of eastern Oregon and western Idaho, in Howell, D.G., and McDougall, K.A., eds., Mesozoic paleogeography of the western United States, Pacific coast paleogeography II: Los Angeles, Pacific Section, Society of Economic Paleontologists and Mineralogists, p. 133-145.
18. Brooks, H.C., McIntyre, J.R., and Walker, G.W., 1976, Geology of the Oregon part of the Baker 1° by 2° quadrangle: Portland, Oregon Department of Geology and Mineral Industries Map Series 7, scale 1:250,000, 1 sheet, 29 p.
19. Brown, C.E., and Thayer, T.P., 1963, Low-grade mineral facies in Upper Triassic and Lower Jurassic rocks of the Aldrich Mountains, Oregon: Journal of Sedimentary Petrology, v. 33, p. 411-425.
20. Brown, E.H., 1977, The crossite content of Ca-amphibole as a guide to pressure of metamorphism: Journal of Petrology, v. 18, part 1, p. 53-72.
21. Burchfiel, B.C., Cowan, D.S., and Davis, G.A., 1992, Tectonic overview of the Cordilleran orogen in the western United States, in Burchfiel, B.C., et al., eds., The Cordilleran orogen: Conterminous U.S.: Boulder, Colorado, Geological Society of America, The Geology of North America, v. G-3, p. 407-480.
22. Burnham, C.W., 1979, The importance of volatile constituents, in Yoder, Jr., H.S., ed., The Evolution of the igneous rocks: Fiftieth anniversary perspectives: Princeton, New Jersey, Princeton University Press, p. 439-462.
23. Coward, R.I., 1983, Structural geology, stratigraphy and petrology of the Elkhorn Ridge Argillite, Sumpter area, northeastern Oregon [Ph.D. dissertation]: Houston, Rice University, 199 p.
24. Dickinson, W.R., and Thayer, T.P., 1978, Paleogeographic and paleotectonic mplications of Mesozoic stratigraphy and structure in the John Day inlier of central Oregon, in Howell, D.G., and McDougall, K.A., eds., Mesozoic paleogeography of the western United States, Pacific coast paleogeography II: Los Angeles, Pacific Section, Society of Economic Paleontologists and Mineralogists, p. 147-161.
25. Ehlers, E.G., and Blatt, H., 1982, Petrology: Igneous, sedimentary, and metamorphic: San Francisco, W.H. Freeman and Co., 732 p.
26. Elthon, D., 1981, Metamorphism in oceanic spreading centers, in Emiliani, C., ed., The Oceanic Lithosphere: New York, John Wiley, p. 285-303.
27. Elthon, D., and Casey, J.F., 1985, The very depleted nature of certain primary mid-ocean ridge basalts: Geochimica et Cosmochimica Acta, v. 49, p. 289- 298, doi: 10.1016/0016-7037(85)90211-X.
28. Ernst, W.G., 1990, Accretionary terrane in the Sawyers Bar area of the western Triassic and Paleozoic belt, central Klamath Mountains, northern California, in Harwood, D.S., and Miller, M.M., eds., Paleozoic and early Mesozoic paleogeographic relations; Sierra Nevada, Klamath Mountains, and related terranes: Boulder, Colorado, Geological Society of America Special Paper 255, p. 297-305.
29. Ernst, W.G., 1999, Mesozoic petrotectonic development of the Sawyers Bar suprasubduction-zone arc, central Klamath Mountains, northern California: Geological Society of America Bulletin, v. 111, p. 1217-1232, doi: 10.1130/0016-7606(1999)111<1217:MPDOTS>2.3.CO;2.
30. Ernst, W.G., Hacker, B.R., Barton, M.D., and Sen, G., 1991, Igneous petrogenesis of magnesian metavolcanic rocks from the central Klamath Mountains, Northern California: Geological Society of America Bulletin, v. 103, p. 56-72, doi: 10.1130/0016-7606(1991)103<0056:IPOMMR>2.3.CO;2.
31. Ferns, M.L., and Brooks, H.C., 1995, The Bourne and Greenhorn subterranes of the Baker terrane, northeastern Oregon: Implications for the evolution of the Blue Mountains island-arc system, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 331-358.
32. Ferns, M.L., Brooks, H.C., and Avery, D.G., 1987, Geology and gold deposits of the Elkhorn Peak quadrangle, Baker County, Oregon: Portland, Oregon Department of Geology and Mineral Industries Map Series GMS-41, scale 1:24,000, 2 sheets.
33. Follo, M.F., 1992, Conglomerates as clues to the sedimentary and tectonic evolution of a suspect terrane: Wallowa Mountains, Oregon: Geological Society of America Bulletin, v. 104, p. 1561-1576, doi: 10.1130/0016-7606 (1992)104<1561:CACTTS>2.3.CO;2.
34. Follo, M.F., 1994, Sedimentology and stratigraphy of the Martin Bridge Limestone and Hurwal Formation (Upper Triassic to Lower Jurassic) from the Wallowa Terrane, Oregon, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains Region in Oregon, Idaho, and Washington: Stratigraphy, physiography, and mineral resources: Reston, Virginia, U.S. Geological Survey Professional Paper 1439, p. 1-27.
35. Follo, M.F., and Siever, R., 1985, Carbonate platform margin facies of an evolving suspect terrane: Wallowa Mountains, Oregon: Geological Society of America Abstracts with Programs, v. 17, p. 584-585.
36. Gilluly, J., 1937, Geology and mineral resources of the Baker quadrangle, Oregon: Washington, D.C., U.S. Geological Survey Bulletin 879, 119 p.
37. Goebel, P.M., 1990, A study and comparison of portions of the Huntington-Olds Ferry and Wallowa-Seven Devils volcanic arc terranes [M.S. thesis]: Eugene, University of Oregon, 130 p.
38. Goles, G.G., 1978, Instrumental methods of neutron activation analysis, in Zussman, J., ed., Physical methods in determinative mineralogy, 2nd edition: London, Academic Press, p. 349-369.
39. Goodge, J.W., 1989, Evolving early Mesozoic convergent margin deformation, central Klamath Mountains, northern California: Tectonics, v. 8, p. 845- 864.
40. Goodge, J.W., 1990, Tectonic evolution of a coherent Late Triassic subduction complex, Stuart Fork Terrane, Klamath Mountains, Northern California: Geological Society of America Bulletin, v. 102, p. 86-101, doi: 10.1130/ 0016-7606(1990)102<0086:TEOACL>2.3.CO;2.
41. Hacker, B.R., and Goodge, J.W., 1990, Comparison of early Mesozoic highpressure rocks in the Klamath Mountains and Sierra Nevada, in Harwood, D.S., and Miller, M.M., eds., Paleozoic and early Mesozoic paleogeographic relations; Sierra Nevada, Klamath Mountains, and related terranes: Boulder, Colorado, Geological Society of America Special Paper 255, p. 277-295.
42. Hacker, B.R., Ernst, W.G., and McWilliams, M.O., 1993, Genesis and evolution of a Permian magmatic/accretionary wedge, and reevaluation of the terrane concept in the central Klamath Mountains: Tectonics, v. 12, p. 387-409.
43. Harper, G.D., Bowman, J.R., and Kuhns, R., 1988, A field, chemical and stable isotope study of subseafloor metamorphism of the Josephine ophiolite, California- Oregon: Journal of Geophysical Research, v. 93, p. 4625-4656.
44. Hillhouse, J.W., Grommé, C.S., and Vallier, T.L., 1982, Paleomagnetism and Mesozoic tectonics of the Seven Devils volcanic arc in northeastern Oregon: Journal of Geophysical Research, v. 87, p. 3777-3794.
45. Hotz, P.E., Lanphere, M.A., and Swanson, D.A., 1977, Triassic blueschist from northern California and North-central Oregon: Geology, v. 5, p. 659-663, doi: 10.1130/0091-7613(1977)5<659:TBFNCA>2.0.CO;2.
46. Humphris, S.E., 1984, The mobility of the rare earth elements in the crust, in Henderson, P., ed., Rare earth element geochemistry: New York, Elsevier Science Publishing, p. 317-342.
47. Irwin, W.P., 1972, Terranes of the western Paleozoic and Triassic belt in the southern Klamath Mountains, California: Washington, D.C., U.S. Geological Survey Professional Paper 800C, p. 103-111.
48. Irwin, W.P., 1994, Geologic map of the Klamath Mountains, California and Oregon: Reston, Virginia, U.S. Geological Survey Miscellaneous Investigation Series Map I-2148, scale 1:500,000, 2 sheets.
49. Irwin, W.P., 2003, Correlation of the Klamath Mountains and Sierra Nevada: Reston, Virginia, U.S. Geological Survey Open-File Report 02-490, scale 1:100,000, 2 sheets.
50. Johnson, K., Johnson, I.G., Hudson, J., Jackson, M., Browning, J.M., Barnes, C.G., and Karlsson, H.R., 1999, Petrology of the Jurassic Wallowa batholith and Fish Lake complex: Implications for terrane amalgamation in the Blue Mountains province of northeastern Oregon: Geological Society of America Abstracts with Programs, v. 31, p. 164.
51. Jones, D.L., Silberling, N.J., and Hillhouse, J.W., 1977, Wrangellia-A displaced terrane in northwestern North America: Canadian Journal of Earth Sciences, v. 14, p. 2565-2577.
52. Leeman, W.P., Smith, D.R., Hildreth, W., Palacz, Z., and Rogers, N., 1990, ompositional diversity of Late Cenozoic basalts in a transect across the southern Washington Cascades: Implications for subduction zone magmatism: Journal of Geophysical Research, v. 95, p. 19,561-19,582.
53. Leeman, W.P., Avé Lallemant, H.G., Gerlach, D.C., Sutter, J.F., and Arculus, R.J., 1995, Petrology of the Canyon Mountain Complex, eastern Oregon, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 1-44.
54. Liou, J.G., 1971, Analcime equilibria: Lithos, v. 4, p. 389-402, doi: 10.1016/ 0024-4937(71)90122-8.
55. Lund, K., 1995, Metamorphic and structural development of island-arc rocks in the Slate Creek-John Day Creek area, west-central Idaho, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 517-540.
56. Lund, K., and Snee, L.W., 1988, Metamorphism, structural development, and age of continental-island arc juncture in west-central Idaho, in Ernst, W.G., ed., Metamorphism and crustal evolution in the western conterminous U.S.: Englewood Cliffs, New Jersey, Prentice-Hall, p. 296-331.
57. Magill, J., and Cox, A., 1980, Tectonic rotation of the Oregon western Cascades, Oregon: Portland, Oregon Department of Geology and Mineral Industries Special Paper 10, p. 1-67.
58. Miller, E.L., Miller, M.M., Stevens, C.H., Wright, J.E., and Madrid, R., 1992, Late Paleozoic paleogeographic and tectonic evolution of the western U.S. Cordillera, in Burchfiel, B.C., et al., eds., The Cordilleran orogen: Conterminous U.S.: Boulder, Colorado, Geological Society of America, The Geology of North America, v. G-3, p. 57-106.
59. Miller, M.M., 1987, Dispersed remnants of a northeast Pacific fringing arc: Upper Paleozoic terranes of Permian McCloud faunal affinity, Western U.S: Tectonics, v. 6, p. 807-830.
60. Mirkin, A.S., 1986, Structural analysis of the East Eagle Creek area, southern Wallowa Mountains, northeastern Oregon [M.S. thesis]: Houston, Rice University, 116 p.
61. Moores, E.M., and Twiss, R.J., 1995, Tectonics: New York, W.H. Freeman and Co., 415 p.
62. Morris, E.M., and Wardlaw, B.R., 1986, Conodont ages for limestones of eastern Oregon and their implication for pre-Tertiary mélange terranes, in Vallier, T.L., and Brooks, H.C., eds., Geologic implications of Paleozoic and Mesozoic paleontology and biostratigraphy, Blue Mountains province, Oregon and Idaho: Reston, Virginia, U.S. Geological Survey Professional Paper 1435, p. 59-63.
63. Mortimer, N., 1986, Late Triassic, arc-related, potassic igneous rocks in the North American Cordillera: Geology, v. 14, p. 1035-1038, doi: 10.1130/ 0091-7613(1986)14<1035:LTAPIR>2.0.CO;2.
64. Mullen, E.D., 1978, Geology of the Greenhorn Mountains, northeastern Oregon [M.S. thesis]: Corvallis, Oregon State University, 372 p.
65. Mullen, E.D., 1983, Petrology and regional setting of peridotite and gabbro of the Canyon Mountain Complex, northeast Oregon: [Ph.D. dissertation]: Corvallis, Oregon State University, 277 p.
66. Norrish, K., and Chappell, B.W., 1977, X-ray fluorescence spectrometry, in Zussman, J., ed., Physical methods in determinative mineralogy, 2nd edition: London, Academic Press, p. 201-272.
67. Pearce, J.A., 1983, Role of sub-continental lithosphere in magma genesis at destructive plate margins, in Hawkesworth, C.J., and Norry, M.J., eds., Continental basalts and mantle xenoliths: Nantwich, England, Shiva Publishers, p. 230-249.
68. Pessagno, E.A., Jr., and Blome, C.D., 1986, Faunal affinities and tectonogenesis of Mesozoic rocks in the Blue Mountains province of eastern Oregon and western Idaho, in Vallier, T.L., and Brooks, H.C., eds., Geologic implications of Paleozoic and Mesozoic paleontology and biostratigraphy, Blue Mountains province, Oregon and Idaho: Reston, Virginia, U.S. Geological Survey Professional Paper 1435, p. 65-78.
69. Phelps, D., 1979, Petrology, geochemistry and origin of the Sparta quartz diorite-trondhjemite complex, Northeastern Oregon, in Barker, F., ed., Trondhjemites, dacites, and related rocks: New York, Elsevier, p. 547- 580.
70. 2 O island-arc volcanism: American Journal of Science, v. 280A, p. 345-358.
71. Philpotts, A.R., 1990, Principles of igneous and metamorphic petrology: Englewood Cliffs, New Jersey, Prentice-Hall, 498 p.
72. Prostka, H.J., and Bateman, R.L., 1962, Geology of the Sparta Quadrangle, Oregon: Portland, Oregon Department of Geology and Mineral Industries Geological Map Series GMS-1, scale 1:62,500, 1 sheet.
73. Raymond, L.E., 2002, Petrology: The study of igneous, sedimentary, and metamorphic rocks, 2nd edition: San Francisco, McGraw-Hill, 720 pp.
74. Saleeby, J.B., 1983, Accretionary tectonics of the North American Cordillera: Annual Reviews of Earth and Planetary Science, v. 11, p. 45-73, doi: 10.1146/annurev.ea.11.050183.000401.
75. Saleeby, J.B., 1990, Geochronological and tectonostratigraphic framework of Sierran-Klamath ophiolitic assemblages, in Harwood, D.S., and Miller, M.M., eds., Paleozoic and early Mesozoic paleogeographic relations; Sierra Nevada, Klamath Mountains, and related terranes: Boulder, Colorado, Geological Society of America Special Paper 255, p. 93-114.
76. Saleeby, J.B., 1992, Petrotectonic and paleogeographic settings of U.S. Cordilleran ophiolites, in Burchfiel, B.C., et al., eds., The Cordilleran orogen: Conterminous U.S.: Boulder, Colorado, Geological Society of America, The Geology of North America, v. G-3, p. 653-682.
77. 39 Ar (biotite/hornblende) from rocks of the Central Foothills terrane, Sierra Nevada, California: Geological Society of America Bulletin, v. 101, p. 1481-1492, doi: 10.1130/0016-7606 (1989)101<1481:ISOPUZ>2.3.CO;2.
78. Saleeby, J.B., Busby-Spera, C., Oldow, J.S., Dunne, G.C., Wright, J.E., Cowan, D.S., Walker, N.W., and Allmendinger, R.W., 1992, Early Mesozoic tectonic evolution of the western U.S. Cordillera, in Burchfiel, B.C., et al., eds., The Cordilleran orogen: Conterminous U.S.: Boulder, Colorado, Geological Society of America, The Geology of North America, v. G-3, p. 107-168.
79. Sarewitz, D.R., 1983, Geology of part of the Heavens Gate quadrangle, Seven Devils Mountains, western Idaho [M.S. thesis]: Corvallis, Oregon State University, 144 p.
80. Schweickert, R.A., Hanson, R.E., and Girty, G.H., 1999, Accretionary tectonics of the western Sierra Nevada metamorphic belt, in Wagner, D.L., and Graham, S.A., eds., Geologic field trips in northern California: Meeting of the Cordilleran section: Boulder, Colorado, Geological Society of America Special Publication 119, p. 33-79.
81. Schweickert, R.A., Harwood, D.S., Girty, G.H., and Hanson, R.E., 1984, Tectonic development of the Northern Sierra terrane: An accreted late Paleozoic island arc and its basement, in Lintz, J., ed., Western geological excursions: Boulder, Colorado, Geological Society of America Field Trip Guide, v. 4, p. 1-65.
82. Shroba, C.S., 1992, Paleoecology and taphonomy of Middle Tertiary and Recent sediments from Oregon and Washington, and biogeographic affinities of the Wallowa terrane, eastern Oregon [Ph.D. dissertation]: Eugene, University of Oregon, 181 p.
83. Silberling, N.J., Jones, D.L., Blake, M.C., and Howell, D.G., 1984, Lithotectonic terrane map of the western conterminous United States, Part C, in Silberling, N.J., and Jones, D.L., eds., Lithotectonic terrane maps of the North American Cordillera: Reston, Virginia, U.S. Geological Survey Open-File Report 84-523, p. 1-43.
84. 39 Ar chronicle of the tectonic development of the Salmon River suture zone, western Idaho, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 359-414.
85. Spear, F.S., 1993, Metamorphic phase equilibria and pressure-temperature- time paths: Mineralogical Society of America Monograph 1: Washington, D.C., 799 p.
86. Spry, A., 1969, Metamorphic textures: London, Pergamon Press, 350 p.
87. Stanley, G.D., 1986, Late Triassic coelenterate faunas of western Idaho and northeastern Oregon: Implications for biostratigraphy and paleogeography, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Geologic implications of Paleozoic and Mesozoic paleontology and biostratigraphy, Blue Mountains province, Oregon and Idaho: Reston, Virginia, U.S. Geological Survey Professional Paper 1435, p. 23-41.
88. Taubeneck, W.H., 1964, Cornucopia Stock, Wallowa Mountains, Northeastern Oregon: Field relationships: Geological Society of America Bulletin, v. 75, p. 1093-1116.
89. Thompson, A.B., 1971, Analcite-albite equilibria at low temperatures: American Journal of Science, v. 271, p. 79-92.
90. Vallier, T.L., 1977, The Permian and Triassic Seven Devils Group, western Idaho and northeastern Oregon: Reston, Virginia, U.S. Geological Survey Bulletin 1437, 58 p.
91. Vallier, T.L., 1995, Petrology of pre-Tertiary igneous rocks in the Blue Mountains region of Oregon, Idaho, and Washington: Implications for the geologic evolution of a complex island arc, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 125-210.
92. Vallier, T.L., and Batiza, R., 1978, Petrogenesis of spilite and keratophyre from a Permian and Triassic volcanic arc terrane, eastern Oregon and western Idaho: Canadian Journal of Earth Sciences, v. 15, p. 1356-1369.
93. Vallier, T.L., and Brooks, H.C., 1986, Paleozoic and Mesozoic faunas of the Blue Mountains province: Areview of their geologic implications and comments on papers in the volume, in Vallier, T.L., and Brooks, H.C., eds., Geologic implications of Paleozoic and Mesozoic paleontology and biostratigraphy, Blue Mountains province, Oregon and Idaho: Reston, Virginia, U.S. Geological Survey Professional Paper 1435, p. 1-6.
94. Vallier, T.L., Brooks, H.C., and Thayer, T.P., 1977, Paleozoic rocks of eastern Oregon and western Idaho, in Stewart, J.H., et al., eds., Paleozoic paleogeography of the western United States I: Los Angeles, Pacific Section, Society of Economic Paleontologists and Mineralogists, p. 455-466.
95. Walker, G.W., and MacLeod, N.S., 1991, Geologic map of Oregon: Reston, Virginia, U.S. Geological Survey Special Geological Map, scale 1:500,000, 2 sheets.
96. Walker, N.W., 1986, U-Pb geochronologic and petrologic studies in the Blue Mountains terranes, northeastern Oregon and westernmost-central Idaho- Implications for pre-Tertiary tectonic evolution [Ph.D. dissertation]: Santa Barbara, University of California, 224 p.
97. Walker, N.W., 1995, Tectonic implications of U-Pb zircon ages of the Canyon Mountain Complex, Sparta Complex, and related metaplutonic rocks of the Baker terrane, northeastern Oregon, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Petrology and tectonic evolution of pre-Tertiary rocks of the Blue Mountains region: Reston, Virginia, U.S. Geological Survey Professional Paper 1438, p. 247-270.
98. Weis, P.J., Gualtieri, J.L., Cannon, W.F., Tuchek, E.T., McMahan, A.B., and Federspiel, F.E., 1976, Mineral resources of the Eagle Cap Wilderness and adjacent areas, Oregon: Reston, Virginia, U.S. Geological Survey Bulletin 1385-E, 100 p.
99. Wilson, D., and Cox, A., 1980, Paleomagnetic evidence for tectonic rotation of Jurassic plutons in the Blue Mountains, eastern Oregon: Journal of Geophysical Research, v. 85, p. 3681-3689.