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Mountain ophfolite, Oregon: Arnerloan Journal & . of Science, v. 280-A, pr. I, p. 232-288. Loney, R. A., Himmelberg, G. R., and Coleman, lL G., 1971, Structure and petrology of the alpine-type peridotite at Burro Mountain, California, U.S.A.: Journal of Petrology, v. 12, no. 2, p. 245-309. Patton, W. W., Jr., 1978, red continental and oceanic-island are t n the Medfra quadrangle, r west-central Alaska, & Johnson, K. ed-- --., The ... 2 United States Geological Survey Aleska: Accomplishments during 1971: U.S. Geological Survey Circular 772-B, p. B38-839. Pat to In, W. W., Jt., Tailleur, I. L., Brosg6,W. P., and Lanphere, M. A., 1977, Preliminary report on the ophiolite s of nor thern and western Alaska, & Coleman , R. G. and Irwin, W. P., eds., North America1 n ophioli tes: Oregon Department of 156'30' 156'00' EXPLANATION = [I SSuIcial deposits (baremary) Sedlmnlary rocks (Cretaceous)- .(ng!omerate. un&+ono, mc~ slllslone Pwidollte, undividsd (Juras! I L_1 Harzburgite tectonite J p c Cumulate ultmmf~c rocks I T ] Basall, gabbm, and cherl (Triassic to Mississippian) = pz$~ Schlsr and quanzlte (low Palmzoic and (or) hmmb"an) 64O 30' CCkR (Triassic to Mirsissb 64' 00' 0 10 20 30 KILOMETERS I . . 1- MMab ( her Paleozoic and (or) Precambrian) Contact-Appmximatety localad - - Rulr-lntaned high angle r - r Thrust lavlt-Herred; datted where cmcealed Plgure 15.-Geologic map of southeastern part of Nulato quadrangle, Alaska (from W. W. Pat ton, Jr., written commun. 1981). I
I US I Surlicial dcnrrua,ts [~daternary) 1- Sandstone, prit, and aqilllte (Jurassic? I T ) Volcanic I ary and (or) to Mississippian) -ELJ 7 1 Cretacea Volcanic : ad pluronlc : complex (Tertiary and (or) Cretaceou: j) Metamhie mks ( lower Paleozoic Pel idotite (agi ! uncertain)-Dlvlded into: . . .. sanosrone arm snale (Cretaceous) hamurgln tktonite Chert. tuff. arglllite, a d basalt (Juranlc? I[ ultramaflc rocks to Mississippian) DO~O ulnere. wrlrzen cornrnun. LYOL). ely lacat~d --- Fault-Inferred hlgh angle leastern part of Ophlr quadrangle, Aleska (Tram R. M. Chapman
Page 1 and 2: n Alas Accompli: ' I.S. GE OLOGI CA
Page 3 and 4: I CONTENTS Page A bst raet ........
Page 5 and 6: -- --A I ALASEU i nued rral expluru
Page 7 and 8: ........ igure .JB. ;5~ercn map ox
Page 9 and 10: . , ".,k a. ,.e ,\a 1 y U11 IIIUUII
Page 11: THE UNITED STATES GEOLOGICAL SURVEY
Page 15 and 16: ~ t I r n t S i m ~ ~ Alarr a ~ man
Page 17 and 18: I -1977, RelImlnary documentat!on l
Page 19 and 20: I I MaCenn, W. R., Perez, 0. J., an
Page 21 and 22: were deslgned to impMve the accurac
Page 23 and 24: Noatak Sandstom and is overlaln con
Page 25 and 26: I (Nilsen and others, 1981a); (2) f
Page 27 and 28: I that contains the Upper Devonian
Page 29 and 30: who found Westeqaardodina sp., posb
Page 31 and 32: Table 2 lists the means rtnd for th
Page 33 and 34: ' Noatak Vdley (fig. 129. This ice
Page 35 and 36: 3 EUMN OF MAP UNITS WAmWARY OUAERNA
Page 37: -om displacement of the cc tween th
Page 41 and 42: I Plafker, George, Hudson, Travis,
Page 43 and 44: !omlensed iring vapors generated by
Page 45 and 46: and the thinning. -upward cycles .,
Page 47 and 48: Kellum, L. B., Devless, S. N., and
Page 49 and 50: 1912 sample (a mediumwey pumice blo
Page 51 and 52: various Utholagic units present Thu
Page 53 and 54: fault, and Its depositional basemen
Page 55 and 56: suggested by coplanar foUaticm and
Page 57 and 58: 1 slgnlficarrtly more umnlum (73&1,
Page 59 and 60: ecrSigtallized catadastic matrix of
Page 61 and 62: analyzed to determine whether Immob
Page 63 and 64: are tgplcd of both ocean-floor basa
Page 65 and 66: & Fclsic in~rutirt rucks 0 Eio~ite
Page 67 and 68: are Lrdlcated by coexisting @&ite+q
Page 69 and 70: (Mg3.09 pe2+ 0.69 pe 0.~1~0.01~~0.9
Page 71 and 72: westward into a narrow band that ex
Page 73 and 74: EXF'lANATIOW 66600' Contan-Apprnimn
Page 75 and 76: ! few fold closures are preserved.
Page 77 and 78: even thickness and conform to irreg
Page 79 and 80: (Alnus ap.), heaths (Ericaceae, + E
Page 81 and 82: terrane extends at least 300 krn to
Page 83 and 84: Table 19.--6tneral petrography of M
Page 85 and 86: were measured on 8 12-in. mass spec
Page 87 and 88: Thin lenses of cabonate packtone to
Page 89 and 90:
The cantwell(?) Pormation south of
Page 91 and 92:
in the 18 lava flows b thermoremane
Page 93 and 94:
Upper Cretaceous shale in contact w
Page 95 and 96:
Gran tz, Arthur, 1960, Generalized
Page 97 and 98:
at 15 to 20 percent. Primary Inolus
Page 99 and 100:
addition, this factor generally def
Page 101 and 102:
Joreskog, K. G., Klovan, J. E., and
Page 103 and 104:
Mineral qItWation end r ~ k t k W e
Page 105 and 106:
1 "~_liO-/ 200 1000 B roo C E % A B
Page 107 and 108:
Smaller placer mines ere active on
Page 109 and 110:
Figme 62.-Plant fassils from the co
Page 111 and 112:
Hallam, Anthony, 1975, Alfred Wegen
Page 113 and 114:
u ALASKA Figure 65.--Sketch map of
Page 115 and 116:
F ' i a?.-Intertidal bluffs compose
Page 117 and 118:
C-s - - Figure 70.-Products of eros
Page 119 and 120:
curve is based indicates that 6.1 c
Page 121 and 122:
sampled is related to widespread ma
Page 123 and 124:
marble is alsa locally present In t
Page 125 and 126:
Bedding in the conglomerate ranges
Page 127 and 128:
1 purpose of this study wes to dete
Page 129 and 130:
The secona k~~-~ri?tation mmes that
Page 131 and 132:
epizonb'l granitic Miss, mixed with
Page 133 and 134:
40 40 Forbes, R. B., and Engels, J.
Page 135 and 136:
foliated and inequigranular end con
Page 137 and 138:
I I thy euheclra. Sphene anhedra an
Page 139 and 140:
Quartz Alkali feldspar Plagioclase
Page 141 and 142:
F'@m 85.--Sketch map of Juneau area
Page 143 and 144:
HoUister, L. 8, 1966, Garnet zoning
Page 145 and 146:
! ~ bI8oO, (IN PERMIL) ~lqp~e 87.-8
Page 147 and 148:
Figure 90.-Offshore ereas discussed
Page 149 and 150:
Preliminerg analpsis of miemfauna f
Page 151 and 152:
Survey tn Alaekai AccompUshments hh
Page 153 and 154:
Gecllogical Survey Open-File Report
Page 155 and 156:
I provenance, and tectonia sIgnific
Page 157 and 158:
Keith, T. E. C, Barnes, Ivan, afrd
Page 159 and 160:
Open-Flle Report 8P811C, 19 p. + 2
Page 161 and 162:
United States Qeological Survey in
Page 163 and 164:
, ,. nldslra poblisbe!d by Prior, D
Page 165 and 166:
60, Alaska: Offshore Technology Con
Page 167:
Author Index [Page number underscor
Page 170 and 171:
Parks. Bruce ......................
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