Geology of the Eagle-Circle district, Alaska:
Gespeichert in:
| Beteilige Person: | |
|---|---|
| Format: | Buch |
| Sprache: | Englisch |
| Veröffentlicht: |
Washington, DC
US Gov. Print. Off.
1930
|
| Schriftenreihe: | United States Geological Survey
816 |
| Schlagwörter: | |
| Links: | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=018662487&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| Beschreibung: | Biographical references |
| Umfang: | V, 168 S. Ill., graph. Darst., Kt. |
Internformat
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| 245 | 1 | 0 | |a Geology of the Eagle-Circle district, Alaska |c by J. B. Mertie |
| 264 | 1 | |a Washington, DC |b US Gov. Print. Off. |c 1930 | |
| 300 | |a V, 168 S. |b Ill., graph. Darst., Kt. | ||
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Datensatz im Suchindex
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|---|---|
| adam_text | !|M:;;;!
TEKNOK^EfOREN lNGENS , ;
©^libj^ K ; -
71st Congress, 1st Session --- • --- House Document No 89
UNITED STATES DEPARTMENT OF THE INTERIOR
Ray Lyman Wilbur, Secretary
GEOLOGICAL SURVEY
George Otis Smith, Director
Bulletin 816
GEOLOGY OF THE
EAGLE-CIRCLE DISTRICT, ALASKA
BY
J B MERTIE, JR
/ yr -
In O
UNITED STATES
GOVERNMENT PRINTING OFFICE
WASHINGTON : 1930
—• -ft ^
r saleby the Superintendent of Documents, Washington ,D C VJ0A J _ D-, T ;• PriceS) cents
CONTENTS
1 -
Introduction _;11
Location of the area ;—i— --—xl 1
Previous work M l i 1
Scope of the present report - — -i 5
Geographic features :— 6
Relief and drainage J : 6
Special physiographic features 7
Settlements and population _ 9
Trails and transportation ; 10
Climate - - --J - --:i 11
Vegetation • 12
Animal life i : 13
Descriptive geology LJ -4------— L — l— 13
Pre-Cambrian rocks - 11 13
Birch Creek schist ! L- — ^1:—l- l : 13
Cambrian or pre-Cambrian rocksJ; i — J 21
Tindir group 1 _j— 21
Red beds V ; 24
Undifferentiated Paleozoic rocks 1 i_i i 29
Cambrian system — ^ 62
Middle Cambrian or older rocks- 1 L ij i 63
Middle Cambrian limestone - 1 ---- —I ^ 64
Upper Cambrian limestone 1i;! 66
Ordovician system J: 67
Silurian system J: - - -! •; 69
Devonian system — — 75
Middle Devonian series L-_ i- - -I-i 75
Woodchopper volcanicsi_ J— ;_i ?5
Argillite, chert, and cherty grit jd , 80
Carboniferous system - - :;: 84
Mississippian series _L__J-i-^ J-1 -i ; 85
Circle volcanics --LijJ-i J_J_- i l- ; 85
Chert formation 1 *Ji l_^ 88
Calico Bluff formation J! 1 :!----! 95
Mississippian or Pennsylvanian series- ilL-l iL 109
Transitional formation ^- l i-l: 109
Nation River formation 1] L 113
Permian series - 121
Tahkandit limestone l- - J -- i i 121
Triassic system i !_•_ J J :jj i •- 1 130
Upper Triassic series 130
Cretaceous and Tertiary systemsJL 1 1 -j l ; 136
Lower Cretaceous series ii 136
Kandik formation 136
Upper Cretaceous and Eocene series_----^r 1 141
IV
I1 !i CONTENTS
Descriptive geology—Continued i
Quaternarj7 system
Igneous rocks
Undifferentiated greenstone of Paleozoic age
Granite, diorite, and related rocks j -_
Rhyolite and dacite 1 I _ I j
Geologic history
Economic geology 1
Gold placers ;
Distribution
Sources of gold ,
Placer-mining operations
Index
Page
ILLUSTRATIONS
2 A,
Page
PLATE 1 A, Yukon Valley, looking downstream from international bound
ary; B, Yukon River ,at theinouthof Washington Creek;
C, Panoramic view of, the narrows of the Yukon ijRiver
at the mouth of Woodchopper Creek _-j, ------ 10
Valley near the headwaters of the Charley River; B, Undif
ferentiated (possibljj upper Silurian) limestone along
the west bank ;oif ,the Yukon , River, just above Takoma
Creek , -[ _J--__ -,4 -• 10
A, Contorted feldspathic quaijtzite, in• Birch ] Creek schist; B,
Augen gneiss, intrusive into Birch Creek|schist 10
4 A, Cambrian limeston e iand associated rocks on the north bank
of the Yukon River just north of Calico Bluff; B, Crinoids
in crystalline,limestone of Silurian (?) age from west slope
of Loop Mountain, Xukon Tcrrito ry-__z_ __-- 74
5 A, Fossiliferous, Middle, Devonian limestone in Woodchopper
volcanics, as seen aiong the north bank of the Yukon
River opposite Woodchopper; B,, (Woodchopper volcanics
along the northeast bank ,of the Yukon River below the
mouth of„Woodchopper Creek 74
6 A, Lower Mississippian chert formation on the east bank of the
Yukon River just below the mouth of Shade Creek; B, El
lipsoidal greenstone in Woodchopper volcanics on the north
bank of the Yukon Riveri above Woodchopper — • — 74
7 A, Undifferentiated Paleozoic grei;nstonei;in bluff ;on the west
side of the Yukon River, at the; mouth of Mission Creek;
B, Lower Mississippian volcanic rocks along the east bank
of the Yukon River above Circle -^ 74
8 A, Vertical beds of chert, at north end of bluff on the west side
of the Yukon River below Takoma Creek; B, East side of
Calico Bluff, on the Yukon Riyer below Eagle 90
9 Enigmatical fossils in Mississippian or Pennsylvanian transitional
formation 90
|
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| author | Mertie, John Beaver 1888-1980 |
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| discipline | Geologie / Paläontologie |
| format | Book |
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| illustrated | Illustrated |
| indexdate | 2024-12-20T14:00:33Z |
| institution | BVB |
| language | English |
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| physical | V, 168 S. Ill., graph. Darst., Kt. |
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| publishDate | 1930 |
| publishDateSearch | 1930 |
| publishDateSort | 1930 |
| publisher | US Gov. Print. Off. |
| record_format | marc |
| series2 | United States Geological Survey |
| spellingShingle | Mertie, John Beaver 1888-1980 Geology of the Eagle-Circle district, Alaska Geologie Geology Alaska |
| title | Geology of the Eagle-Circle district, Alaska |
| title_auth | Geology of the Eagle-Circle district, Alaska |
| title_exact_search | Geology of the Eagle-Circle district, Alaska |
| title_full | Geology of the Eagle-Circle district, Alaska by J. B. Mertie |
| title_fullStr | Geology of the Eagle-Circle district, Alaska by J. B. Mertie |
| title_full_unstemmed | Geology of the Eagle-Circle district, Alaska by J. B. Mertie |
| title_short | Geology of the Eagle-Circle district, Alaska |
| title_sort | geology of the eagle circle district alaska |
| topic | Geologie Geology Alaska |
| topic_facet | Geologie Geology Alaska |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=018662487&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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