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Call Number Author Topic Genre Region Era

By Alphabetical By Genre By Region By Era

20th century 10,905 View Records 19th century 5,185 View Records 21st century 2,736 View Records 18th century 1,583 View Records Civil War, 1861-1865 991 View Records 17th century 973 View Records 1945- 887 View Records 1564-1616 849 View Records Cretaceous 838 View Records 1945-1989 748 View Records 16th century 591 View Records 1933-1945 553 View Records Revolution, 1775-1783 519 View Records 1989- 485 View Records 1946- 484 View Records Tertiary 447 View Records To 1500 441 View Records Quaternary 417 View Records 2009- 408 View Records 2001-2009 389 View Records Early modern, 1500-1700 385 View Records Colonial period, ca. 1600-1775 373 View Records 1991- 349 View Records Precambrian 346 View Records Paleozoic 334 View Records Cenozoic 293 View Records 1960- 278 View Records 1951- 268 View Records 2000- 261 View Records 1929 252 View Records Permian 250 View Records Eocene 235 View Records 1918-1945 228 View Records Jurassic 225 View Records 1993-2001 223 View Records 1981-2001 217 View Records Mesozoic 216 View Records 1949- 210 View Records Pennsylvanian 206 View Records Miocene 201 View Records 1809-1865 200 View Records Pleistocene 193 View Records 1947- 192 View Records 1961-1970 189 View Records Ordovician 189 View Records 1948- 185 View Records Devonian 174 View Records 1991-2000 172 View Records 1979- 171 View Records 1945-1953 168 View Records 1950- 165 View Records Mississippian 164 View Records 1980- 162 View Records 1952- 155 View Records 1990- 154 View Records 1783-1865 148 View Records 1882-1945 148 View Records 1953-1961 148 View Records Triassic 148 View Records 1969- 146 View Records 1970- 146 View Records 1965- 143 View Records 1917-1963 138 View Records 1959- 136 View Records Civil War, 2011- 136 View Records 1981-1989 135 View Records 2001- 133 View Records 1993- 130 View Records Middle English, 1100-1500 130 View Records 1866-1895 128 View Records To 1775 124 View Records 1954- 123 View Records Cambrian 123 View Records 1951-1960 121 View Records 1956- 120 View Records -1400 118 View Records 1608-1674 118 View Records World War, 1939-1945 118 View Records 1775-1865 117 View Records 1958- 117 View Records 2003- 117 View Records Revolution, 1789-1799 117 View Records 1997- 116 View Records 1775-1783 115 View Records 1882-1941 115 View Records 1975- 115 View Records Holocene 115 View Records Pliocene 114 View Records 1961- 113 View Records 1913-1994 112 View Records 1960-1980 112 View Records 1941- 109 View Records 1964- 109 View Records 1981-1990 109 View Records Middle Ages, 600-1500 109 View Records 1944- 108 View Records Early church, ca. 30-600 108 View Records 1942- 106 View Records 1955- 105 View Records 1724-1804 104 View Records

Geology, Stratigraphic 218 Geology 121 Paleontology 42 Phosphate rock 42 Phosphoria Formation 26 Petrology 13 Sandstone 8 Sedimentation and deposition 8 Paleobotany 7 Geology, Structural 6 Petroleum Geology 6 Phosphates 6 Cutler Formation 5 Fusulinidae 5 Geochemistry 5 Animals, Fossil 4 Formations (Geology) 4 Mines and mineral resources 4 Texas 4 Borings 3 Footprints, Fossil 3 Maroon Formation (Colo.) 3 Ostracoda, Fossil 3 Powder River Basin (Wyo. and Mont.) 3 Reefs 3 White Rim Sandstone (Utah) 3 Alaska 2 Brachiopoda, Fossil 2 Catastrophes (Geology) 2 Central Oklahoma Aquifer (Okla.) 2 Chinle Formation 2 Coal Geology 2 Conservation of natural resources 2 Copper ores 2 Cutler Group 2 Diagenesis 2 Extinction (Biology) 2 Extinction (Biology) History 2 Fishes, Fossil 2 Fusulinida 2 Geochemical prospecting 2 Groundwater 2 Guadalupe Mountains National Park (Tex.) 2 Hydrothermal alteration 2 Igneous rocks 2 Lithostrotionidae 2 Mesaverde Group 2 Metamorphic rocks 2 Micropaleontology 2 Mollusks, Fossil 2 National monuments Management 2 Natural gas Geology 2 Natural monuments Management 2 Paleobiology 2 Paleogeography 2 Piceance Creek Basin (Colo.) 2 Plants, Fossil 2 Prehistoric Trackways National Monument (N.M.) 2 Public lands Management 2 Sedimentary rocks 2 Shale 2 Sphenopsida, Fossil 2 Tethys (Paleogeography) 2 Uinta Basin (Utah and Colo.) 2 Vanadium ores 2 Yeso Formation (N.M. and Tex.) 2 Ammonoidea 1 Anoxic zones 1 Antarctica 1 Belden Formation (Colo.) 1 Black shales Analysis 1 Briquets (Fuel) 1 Brown County (Tex.) 1 Building materials 1 Clay 1 Coal 1 Coleman County (Tex.) 1 Colloids 1 Colorado 1 Corals, Fossil 1 Drill core analysis 1 Drill cores 1 Eagle Valley Formation (Colo.) 1 End-Permian Extinction 1 Facies (Geology) 1 Foraminifera, Fossil 1 Fuel Testing 1 Geology, Stratigraphic Nomenclature 1 Geophysics 1 Glass Mountains (Tex.) 1 Gondwana (Continent) 1 Groundwater Quality 1 Groundwater flow Mathematical models 1 Groups (Stratigraphy) 1 Hydrocarbon reservoirs 1 Hydrocarbons 1 Idaho 1 Intrusions (Geology) 1 Invertebrates, Fossil 1 Kansas 1