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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 6196
Age and isotopic systematics of Cretaceous borehole and surface samples from the greater Los Angeles Basin region: Implications for the types of crust that might underlie Los Angeles and their distribution along late Cenozoic fault systems Age and isotopic systematics of Cretaceous borehole and surface samples from the greater Los Angeles Basin region: Implications for the types of crust that might underlie Los Angeles and their distribution along late Cenozoic fault systems
Nine U-Pb zircon ages were determined on plutonic rocks sampled from surface outcrops and rock chips of drill core from boreholes within the greater Los Angeles Basin region. In addition, lead-strontium-neodymium (Pb-Sr-Nd) whole-rock isotopic data were obtained for eight of these samples. These results help to characterize the crystalline basement rocks hidden in the subsurface and...
Authors
Wayne R. Premo, Douglas M. Morton, Ronald W. Kistler
An applied ontology for semantics associated with surface water land cover An applied ontology for semantics associated with surface water land cover
No abstract available.
Authors
Dalia E. Varanka, E. Lynn Usery
Applying threshold concepts to conservation management of dryland ecosystems: Case studies on the Colorado Plateau Applying threshold concepts to conservation management of dryland ecosystems: Case studies on the Colorado Plateau
Ecosystems may occupy functionally distinct alternative states, some of which are more or less desirable from a management standpoint. Transitions from state to state are usually associated with a particular trigger or sequence of triggers, such as the addition or subtraction of a disturbance. Transitions are often not linear, rather it is common to see an abrupt transition come about...
Authors
Matthew A. Bowker, Mark E. Miller, Steven L. Garman, Travis Belote
Climate Change 2014: Technical Summary Climate Change 2014: Technical Summary
Human interference with the climate system is occurring (WGI AR5 SPM Section D.3; WGI AR5 Sections 2.2, 6.3, 10.3 to 10.6, 10.9). Climate change poses risks for human and natural systems. The assessment of impacts, adaptation, and vulnerability in the Working Group II contribution to the IPCC’s Fifth Assessment Report (WGII AR5) evaluates how patterns of risks and potential benefits are...
Authors
Chrisopher B. Field, Vicente Barros, Katherine Mach, Michael Mastrandrea, Maarten van Aalst, Niel Adger, Douglas J Arent, Jonathan Barnett, Richard Betts, Eren Bilir, Joern Birkmann, Joann Carmin, Dave Chadee, Andrew Challinor, Monalisa Chaterjee, Wolfgang Cramer, Debra Davidson, Yuka Estrada, Jean-Pierre Gatusso, Yasuakai Hijioka, Gary Yohe, Margaret Hiza, Ove Hoegh-Guldberg, He-Qing Huang, Gregory Insarov, Roger Jones, Sari Kovats, Patricia Romero Lankao, Joan Nymand Larsen, Inigo Losada, Jose Marengo, Roger McLean, Linda Mearns, Reinhard Mechler, John Morton, Isabelle Niang, Taikan Oki, Jane Mukarugwiza Olwoch, Maggie Opondo, Elvira Poloczanska, Hans #NAME? Portner, Andy Reisinger, Aromar Revi, Daniela Schmidt, Rebecca Shaw, William Solecki, Daithi Stone, John Stone, Ken Strzepek, Avelino G. Suarez, Petra Tschakert, Riccardo Valentini, Sebastian Vicuna, Alicia Villamizar, Katharine Vincent, Rachel Warren, Leslie White, Thomas Wilbanks, Poh Poh Wong
Earthquake mechanism and seafloor deformation for tsunami generation Earthquake mechanism and seafloor deformation for tsunami generation
Tsunamis are generated in the ocean by rapidly displacing the entire water column over a significant area. The potential energy resulting from this disturbance is balanced with the kinetic energy of the waves during propagation. Only a handful of submarine geologic phenomena can generate tsunamis: large-magnitude earthquakes, large landslides, and volcanic processes. Asteroid and...
Authors
Eric L. Geist, David D. Oglesby
Finding that academic position Finding that academic position
No abstract available.
Authors
David W. Willis, Daniel A. Isermann
Fishes and amphibians as laboratory model organisms for toxicological research Fishes and amphibians as laboratory model organisms for toxicological research
No abstract available.
Authors
Sandeep Mukhi, Leticia Torres, Bibek Sharma, Madhavi Billam, Reynaldo Patino
Fluorescence and dissolved organic matter: A chemist’s perspective Fluorescence and dissolved organic matter: A chemist’s perspective
No abstract available.
Authors
George R. Aiken
Free-living waterfowl and shorebirds Free-living waterfowl and shorebirds
No abstract available.
Authors
Daniel M. Mulcahy
Free-living waterfowl and shorebirds Free-living waterfowl and shorebirds
No abstract available.
Authors
Daniel M. Mulcahy
Geochemistry of a marine phosphate deposit: A signpost to phosphogenesis Geochemistry of a marine phosphate deposit: A signpost to phosphogenesis
The Permian age Phosphoria Formation in southeastern Idaho and adjoining states represents possibly the largest marine phosphate deposit in the world. The Meade Peak Member, which contains the highest concentrations and amount of carbonate fluorapatite in the formation, was not significantly altered by mechanical reworking during deposition or subsequently by chemical weathering. Thus...
Authors
David Z. Piper, R.B. Perkins