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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.
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: 6197
Submarine slides north of Puerto Rico and their tsunami potential Submarine slides north of Puerto Rico and their tsunami potential
New multibeam bathymetry of the entire Puerto Rico trench reveals numerous retrograde slope failures at various scales at the edge of the carbonate platform north of Puerto Rico and the Virgin Islands. The slumped material comprises carbonate blocks, which fail, at least in initial stages, as a coherent rock mass. This, combined with the fact that the edge of the carbonate platform is...
Authors
Uri S. ten Brink, Eric L. Geist, Patrick J. Lynett, Brian D. Andrews
Data collection network to support ecosystem forecasting for the Barataria Basin - Mississippi River domain Data collection network to support ecosystem forecasting for the Barataria Basin - Mississippi River domain
Ecosystem forecasting is limited by a number of uncertainties including inadequate initialization information, unknown boundary conditions, inaccurate model physics and atmospheric forcing functions, and inadequate algorithm development of geomorphic and ecological responses to hydrodynamic and geophysical processes. Monitoring can help reduce these uncertainties by providing numerical...
Authors
Gregory D. Steyer, Alaina Owens, Brady Couvillion
Wetland researchers on the hurricane front lines Wetland researchers on the hurricane front lines
Close proximity to the Gulf Coast and its expansive wetland ecosystem made Lafayette, Louisiana, a perfect site for the U.S. Geological Survey National Wetlands Research Center. This location also put the center at the edge of the hurricane impact zones. In the days following the storms, researchers became rescuers and scientists saved lives.
Authors
Gregory J. Smith
Solute transport processes Solute transport processes
Soils and aquifers are major compartments of the subsurface environment, which together control the terrestrial hydrological cycle. This subsurface is important for water resources and also as repository for municipal, industrial, and government waste. Aquifers are typically recharged by natural rainfall entering the soil profile and leaching into deeper soil layers. Due to intensive...
Authors
A. Kemna, Andrew Binley, Frederick D. Day-Lewis, Andreas Englert, Bulent Tezkan, Jan Vanderborght, Harry Vereecken, Peter Winship
Accessible information technology for equitable community planning Accessible information technology for equitable community planning
No abstract available.
Authors
Alven H. Lam, Laura M. Norman, Angela J. Donelson
Contrasting cratonal provenances for upper Cretaceous Valle Group quartzite clasts, Baja California Contrasting cratonal provenances for upper Cretaceous Valle Group quartzite clasts, Baja California
Late Cretaceous Valle Group forearcbasin deposits on the Vizcaino Peninsula of Baja California Sur are dominated by firstcycle arc-derived volcanic-plutonic detritus derived from the adjacent Peninsular Ranges batholith. Craton-derived quartzite clasts are a minor but ubiquitous component in Valle Group conglomerates. The source of these clasts has implications for tectonic...
Authors
D.L. Kimbrough, G. Abbott, D.P. Smith, J. B. Mahoney, Thomas E. Moore, G. E. Gehrels
Oceanic gas hydrate character, distribution, and potential for concentration Oceanic gas hydrate character, distribution, and potential for concentration
No abstract available.
Authors
William P. Dillon
Ordination context of GLORIA sites in Glacier National Park, USA Ordination context of GLORIA sites in Glacier National Park, USA
No abstract available.
Authors
G. Malanson, K. Scott, Z.-K. Shen, D. Fagre, K. Holzer
Climatic variability drives changes in the Northern Rocky Mountains of the USA Climatic variability drives changes in the Northern Rocky Mountains of the USA
No abstract available.
Authors
Daniel B. Fagre
Impacts of Tioga Road on groundwater flow in Tuolumne Meadows: Preliminary conceptual model and numerical analysis Impacts of Tioga Road on groundwater flow in Tuolumne Meadows: Preliminary conceptual model and numerical analysis
No abstract available.
Authors
David J. Cooper, Jessica D. Lundquist, Fred C. Lott, Alan L. Flint, Lorraine E. Flint, James Roche
New life for the Colorado River Delta New life for the Colorado River Delta
No abstract available.
Authors
Pamela L. Nagler
Chelydra serpentina - Snapping turtle Chelydra serpentina - Snapping turtle
No abstract available.
Authors
M.J. Aresco, M. A. Ewert, M. S. Gunzburger, G. L. Heinrich, Peter A. Meylan