Book Chapters
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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.
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Asteroid photometry
Asteroid photometry has three major applications: providing clues about asteroid surface physical properties and compositions, facilitating photometric corrections, and helping design and plan ground-based and spacecraft observations. The most significant advances in asteroid photometry in the past decade were driven by spacecraft observations that collected spatially resolved imaging and spectro
Authors
Jian-Yang Li, Paul Helfenstein, Bonnie J. Buratti, Driss Takir, Beth Ellen Clark
Astronomical observations of volatiles on asteroids
We have long known that water and hydroxyl are important components in meteorites and asteroids. However, in the time since the publication of Asteroids III, evolution of astronomical instrumentation, laboratory capabilities, and theoretical models have led to great advances in our understanding of H2O/OH on small bodies, and spacecraft observations of the Moon and Vesta have important implication
Authors
Andrew S. Rivkin, Humberto Campins, Joshua P. Emery, Ellen S. Howell, Javier Licandro, Driss Takir, Faith Vilas
Bioenergetics modeling of percid fishes
A bioenergetics model for a percid fish represents a quantitative description of the fish’s energy budget. Bioenergetics modeling can be used to identify the important factors determining growth of percids in lakes, rivers, or seas. For example, bioenergetics modeling applied to yellow perch (Perca flavescens) in the western and central basins of Lake Erie revealed that the slower growth in the we
Authors
Charles P. Madenjian
Brittle Faults
Brittle shear zones/fault zones are usually defined by curved brittle P-planes bound by usually straight Y-planes. These shears may affect as a narrow zone within the rock bodies. Brittle sheared lenses of rocks vary in geometry, and the P-planes may curve only near the Y-planes. Fault gouge zones sometimes contain P-planes that help to deduce the shear sense. Fault planes/Y-planes may contain sli
Authors
Soumyajit Mukherjee
Cambrian–Ordovician of the central Appalachians:Correlations and event stratigraphy of carbonate platform andadjacent deep-water deposits
This trip seeks to illustrate the succession of Cambrian and Ordovician facies
deposited within the Pennsylvania and Maryland portion of the Great American Carbonate Bank. From the Early Cambrian (Dyeran) through Late Ordovician (Turinan), the Laurentian paleocontinent was rimmed by an extensive carbonate platform. During this protracted period of time, a succession of carbonate rock, more than tw
Authors
David K. Brezinski, John F. Taylor, John E. Repetski, James D. Loch
Challenges to sea otter recovery and conservation
Similar to other species that in recent centuries experienced unregulated human exploitation, sea otters were extirpated throughout large portions of their historic range in the North Pacific. For most of the twentieth century, with cessation of the fur trade and because of concerted efforts at conservation, sea otters recovered much of their historic range and abundance. Late in the twentieth cen
Authors
Brenda E. Ballachey, James L. Bodkin
Conocimientos básico científico y técnico necesarios para la evaluación y gestion de los SAT
No abstract available.
Authors
Randall T. Hanson, Rubén Chávez Guillén, Ofelia Tujchneider, Alfonso Rivera, William Alley, Alyssa Dausman, Lourdes Batista, Marcela Espinoza
Contrasting fish assemblages in free-flowing and impounded tributaries to the Upper Delaware River: Implications for conserving biodiversity
The Neversink River and the Beaver Kill in southeastern New York are major tributaries to the Delaware River, the longest undammed river east of the Mississippi. While the Beaver Kill is free flowing for its entire length, the Neversink River is subdivided by the Neversink Reservoir, which likely affects the diversity of local fish assemblages and health of aquatic ecosystems. The reservoir is an
Authors
Barry P. Baldigo, Mari-Beth Delucia, Walter D. Keller, George E. Schuler, Colin D. Apse, Tara Moberg
Drought monitoring and assessment: Remote sensing and modeling approaches for the Famine Early Warning Systems Network
Drought monitoring is an essential component of drought risk management. It is usually carried out using drought indices/indicators that are continuous functions of rainfall and other hydrometeorological variables. This chapter presents a few examples of how remote sensing and hydrologic modeling techniques are being used to generate a suite of drought monitoring indicators at dekadal (10-day), mo
Authors
Gabriel Senay, Naga Manohar Velpuri, Stefanie Bohms, Michael Budde, Claudia Young, James Rowland, James Verdin
Episodic deflation-inflation events at Kīlauea Volcano and implications for the shallow magma system
Episodic variations in magma pressures and flow rates at Kīlauea Volcano, defined by a characteristic temporal evolution and termed deflation-inflation (DI) events, have been observed since at least the 1990s. DI events consist of transient, days-long deflations and subsequent reinflations of the summit region, accompanied since 2008 by fluctuations in the surface height of Kīlauea's summit lava l
Authors
Kyle R. Anderson, Michael P. Poland, Jessica H. Johnson, Asta Miklius