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Institution
Format
Subject
Geology
748
Geology, Stratigraphic
393
Mines and mineral resources
102
Ore deposits
81
National parks and reserves
78
Paleontology
more ...
76
Petrology
72
Groundwater
56
Environmental monitoring
48
Uranium ores
46
Coal
46
Hydrology
42
National monuments
40
Igneous rocks
39
Geochemistry
37
Water-supply
36
Physical geography
33
Geology, Structural
33
Petroleum
33
Volcanic ash, tuff, etc
31
Hydrogeology
30
Geophysics
29
Borings
29
Petroleum Geology
27
Gold mines and mining
27
Historic sites
26
Volcanoes
24
Gold ores
23
Formations (Geology)
22
Mineralogy
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Author
2,411
Geological Survey (U.S.),
147
SpringerLink (Online service)
129
U.S. Atomic Energy Commission,
89
United States. National Park Service. Natural Resource Stewardship and Science,
67
Thornberry, Trista L.,
61
ScienceDirect (Online service)
more ...
43
Natural Resource Program Center (U.S.),
43
United States. National Park Service. Geologic Resources Division,
40
Graham, John P.
36
KellerLynn, Katie,
19
Darton, Nelson Horatio, 1865-1948,
17
United States. Agency for International Development,
16
Roehler, Henry W.,
15
Michigan. Geological Survey Division
14
Drewes, Harald, 1927-2015,
14
Moffit, Fred H. 1874-1958?,
14
United States. Interdepartmental Committee on Scientific and Cultural Cooperation,
13
Durham, David L., 1925-
13
Kentucky Geological Survey
13
King, Philip B., 1903-1987,
13
United States. Army. Corps of Engineers,
13
United States. Bureau of Mines,
12
Geological Survey of Wyoming
12
Ketner, Keith B., 1921-2019,
12
MacKevett, E. M. 1918-2006,
12
U.S. Atomic Energy Commission
12
University of Wyoming. Department of Geology
11
Armstrong, Augustus K.,
11
Brazil. Departamento Nacional da Produção Mineral
11
California. Division of Mines and Geology
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Language
Genre
117
Electronic government information
39
Maps
33
Conference papers and proceedings
27
Bibliographies
27
Nomenclature
20
Guidebooks
more ...
13
Festschriften
4
Congresses
4
Technical reports
3
Encyclopedias
2
Activity books
2
Atlases
2
Biographies
2
Catalogs
2
Databases
2
Dictionaries
2
Handbooks and manuals
2
Illustrated works
2
Indexes
2
Periodicals
1
Academic theses
1
Classifications
1
Diaries
1
Digital maps
1
Fiction
1
Geographic information systems
1
Geological cross-sections
1
Geological maps
1
Literature
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Literary Form
Era
111
Cretaceous
82
Tertiary
67
Precambrian
53
Quaternary
50
Paleozoic
43
Eocene
more ...
42
Cenozoic
39
Permian
37
Mississippian
35
Mesozoic
35
Ordovician
29
Triassic
27
Jurassic
27
Miocene
27
Pennsylvanian
24
Devonian
22
Pleistocene
20
Cambrian
17
Proterozoic
16
Pliocene
14
Oligocene
13
Silurian
12
Holocene
11
Carboniferous
10
Archaean
7
Neogene
7
Paleocene
2
Paleogene
1
1638-1686
1
1818-1891
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Region
286
Alaska
201
California
198
Colorado
149
Montana
148
Utah
139
Nevada
more ...
129
Arizona
127
Wyoming
93
New Mexico
92
Idaho
71
United States
57
Washington (State)
51
Pennsylvania
51
Texas
43
Oregon
42
Kentucky
41
South Dakota
41
Virginia
35
Michigan
32
New York (State)
26
Georgia
25
Massachusetts
24
Tennessee
23
North America
23
North Carolina
22
Florida
22
New Jersey
22
Oklahoma
22
Wisconsin
21
South Carolina
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Call Number
284
Q - Science
32
G - Geography, Anthropology, Recreation
27
T - Technology
7
H - Social Science
6
A - General Works
2
D - World History
more ...
2
S - Agriculture
2
Z - Library Science
1
C - Historical Sciences
1
E - United States History
1
F - General American History
1
J - Political Science
1
N - Fine Arts
1
R - Medicine
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Year of Publication