Map 1,282 Government Document 1,168 Book 934 Serial 70 Thesis 62 Electronic 51 Conference Proceeding 20 Journal 20 Book Chapter 4 Kit 4 Unknown 1 see all ...

G - Geography, Anthropology, Recreation 978 Q - Science 530 T - Technology 41 F - General American History 13 Z - Library Science 8 D - World History 4 L - Education 4 S - Agriculture 4 U - Military Science 3 C - Historical Sciences 2 B - Philosophy, Psychology, Religion 1 J - Political Science 1 K - Law 1 see all ...

Geological Survey (U.S.) 1,149 Geological Survey of Wyoming 258 Roehler, Henry W 116 Wyoming State Geological Survey 94 Love, J. D (John David), 1913-2002 92 University of Wyoming Department of Geology 74 U.S. Atomic Energy Commission 55 Ver Ploeg, Alan J 49 Wyoming Geological Association 48 Darton, Nelson Horatio, 1865-1948 43 DeBruin, Rodney H 42 McGrew, Laura W (Laura Wenger), 1921- 41 Schroeder, Marvin L 35 Pierce, W. G (William Gamewell), 1904-1994 34 Wyoming Geological Association Annual Field Conference 34 Denson, N. M (Norman MacLaren), 1914- 33 Hayden, F. V (Ferdinand Vandeveer), 1829-1887 33 Hyden, Harold Julius, 1922- 27 Merewether, E. A (Edward Allen), 1930- 27 Christiansen, Ann Coe 26 Keefer, William R., 1924- 26 Richmond, Gerald Martin, 1914- 26 Thaden, Robert E., 1924- 25 Mapel, W. J (William Jameson), 1922- 24 McAndrews, Harry 24 Geological and Geographical Survey of the Territories (U.S.) 22 Wyoming State Engineer's Office 22 Bayley, Richard W (Richard William), 1919- 21 Hausel, W. Dan 21 Houston, Robert S (Robert Stroud), 1923- 21 see all ...

English 2,315

Maps 1,256 Cartes géographiques 80 Geological maps 69 Guidebooks 67 Charts, diagrams, etc 48 Conference papers and proceedings 48 Congresses 39 Periodicals 35 Index maps 27 Bibliography 26 Digital maps 20 Topographic maps 17 Raster data 13 Indexes 12 Geographic information systems data 11 Academic theses 10 Geographic information systems 9 Nomenclature 8 Geological cross-sections 7 Maps, Topographic 7 Thematic maps 7 Cartes géologiques 6 geological maps 6 Atlases 5 Bathymetric maps 5 Drawings 5 Electronic books 5 History 5 Quadrangle maps 5 Thèses et écrits académiques 5 see all ...

Cretaceous 105 Tertiary 57 Eocene 51 From 65 to 140 million years ago 27 From 40 to 55 million years ago 23 Paleocene 22 Precambrian 20 From 2 to 140 million years ago 19 Jurassic 14 Permian 14 Carboniferous 12 Paleozoic 12 Pennsylvanian 11 19th century 10 Triassic 10 From 2 to 65 million years ago 9 From 570 million to 5 billion years ago 9 Quaternary 9 Pliocene 8 Cambrian 6 From 190 to 230 million years ago 6 Paleogene 6 Proterozoic 6 Cenozoic 5 Devonian 5 From 140 to 190 million years ago 5 From 230 to 310 million years ago 5 From 280 to 345 million years ago 5 From 55 to 65 million years ago 5 Pleistocene 5 see all ...