Environmental quality and preservation; reefs, corals, and carbonate sands; guides to reef-ecosystem health and environment
Barbara H. Lidz
2001, Open-File Report 2000-164
Introduction In recent years, the health of the entire coral reef ecosystem that lines the outer shelf off the Florida Keys has declined markedly. In particular, loss of those coral species that are the building blocks of solid reef framework has significant negative implications for economic vitality of the region. What are the reasons for this decline? Is it due...
Testing and application of diffusion samplers to identify temporal trends in volatile-organic compounds
Philip T. Harte, M.J. Brayton, Wayne Ives, Sharon Perkins, Carroll Brown, Richard E. Willey
2001, Open-File Report 2000-196
No abstract available....
Natural gas hydrates; vast resource, uncertain future
T. S. Collett
2001, Fact Sheet 021-01
Gas hydrates are naturally occurring icelike solids in which water molecules trap gas molecules in a cagelike structure known as a clathrate. Although many gases form hydrates in nature, methane hydrate is by far the most common; methane is the most abundant natural gas. The volume of carbon contained in...
Land-use changes and the physical habitat of streams - a review with emphasis on studies within the U.S. Geological Survey Federal-State Cooperative Program
Robert B. Jacobson, Suzanne R. Femmer, Rose A. McKenney
2001, Circular 1175
Understanding the links between land-use changes and physical stream habitat responses is of increasing importance to guide resource management and stream restoration strategies. Transmission of runoff and sediment to streams can involve complex responses of drainage basins, including time lags, thresholds, and cumulative effects. Land-use induced runoff and sediment yield...
The rainfall-triggered landslide and flash-flood disaster in northern Venezuela, December 1999
Matthew C. Larsen, Gerald F. Wieczorek, L.S. Eaton, Heriberto Torres-Sierra
2001, Conference Paper, Proceedings of the Seventh Federal Interagency Sedimentation Conference
Rainstorms in December 1999 induced thousands of landslides along the northern slopes of the Cordillera de la Costa mountain range principally in the state of Vargas, Venezuela. Rainfall accumulation of 293 millimeters during the first 2 weeks ofDecember was followed by an additional 911 millimeters of rainfall on December 14 through 16. The landslides and...
Preplanting site treatments and natural invasion of tree species onto former agricultural fields at the Tensas River National Wildlife Refuge, Louisiana
John W. McCoy, Bobby D. Keeland, B.R. Lockhart, Thomas Dean
2001, Conference Paper, Proceedings of the eleventh biennial southern silvicultural research conference
No abstract available....
Geologic map of the Idaho City 30 x 60 minute quadrangle, Idaho
Thor H. Kiilsgaard, Loudon Stanford, Reed S. Lewis
2001, Idaho Geological Survey Geologic Map GM-29
No abstract available....
Intermittent feeding in a migratory omnivore: Digestion and body composition of American Black Duck during autumn
Perry S. Barboza, Dennis G. Jorde
2001, Physiological and Biochemical Zoology (74) 307-317
Birds fast intermittently during weather disturbances and migration. We tested responses of black duck to lost feeding days during autumn mass gain. Nine adult males were fed a pelleted diet (1.5% fat, 15.8% protein, and 18.3% neutral detergent fiber) and caged indoors during September and October (12 h light; 17°–24°C)...
Coastal-zone hazard maps and recommendations: Eastern Puerto Rico
David M. Bush, Bruce M. Richmond, William J. Neal
2001, Environmental Geosciences (8) 38-60
A series of coastal zone hazard maps cover the area impacted by Hurricane Hugo (1989) in eastern Puerto Rico. The mapping strategy was to develop a tool for quick visualization of multiple hazards for use by coastal planners, managers, property owners, and potential property owners. The Puerto Rico shoreline is...
A plague of frogs: The horrifying true story
Paul Stephen Corn
2001, The Quarterly Review of Biology (76) 64-65
No abstract available...
Measurement of sediment oxygen demand rates in the Mangrove Lagoon, Vessup Bay, and Benner Bay in southeastern St. Thomas, U.S. Virgin Islands
Orlando Ramos-Gines
Walter F. Sylva, editor(s)
2001, Conference Paper, Proceedings of the Sixth Caribbean Islands Water Resources Congress
New empirical models for estimating magnitude and frequency of flood for streams in Puerto Rico
Orlando Ramos-Gines
Walter F. Sylva, editor(s)
2001, Conference Paper, Proceedings of the Sixth Caribbean Islands Water Resources Congress
The effect of changes in barometric pressure, marine tides, and earth tides on ground-water levels in Puerto Rico
R.T. Richards
Walter F. Sylva, editor(s)
2001, Conference Paper, Proceedings of the Sixth Caribbean Islands Water Resources Congress
Evaluation of temporal and spatial factors that control the susceptibility to rainfall-triggered landslides Chapter 26
Matthew C. Larsen
E. Gruntfest, J. Handmer, editor(s)
2001, Book chapter, Coping with Flash Floods
Puerto Rico sources water assessment program
Zuleima Rodriguez, Eva Hernandez, Orlando Ramos-Gines
Walter F. Sylva, editor(s)
2001, Conference Paper, Proceedings of the Sixth Caribbean Islands Water Resources Congress
Measurement of sediment oxygen demand rates in the Mangrove Lagoon, Vessup Bay, and Benner Bay in southeastern St. Thomas, U.S. Virgin Islands
Orlando Ramos-Gines
Walter F. Sylva, editor(s)
2001, Conference Paper, Proceedings of the Sixth Caribbean Islands Water Resources Congress
Emerging scientific tools for studies of water quality, coral reef health, and watershed management in the tropics/Caribbean
Sharon A. Fitzgerald
Walter F. Sylva, editor(s)
2001, Conference Paper, Proceedings of the Sixth Caribbean Islands Water Resources Congress
No abstract available....
Geologic Maps of the Dardanus Sulcus (Jg-6), Misharu (Jg-10), Nabu (Jg-11), and Namtar (Jg-14) Quadrangles of Ganymede
Ted A. Maxwell, Ursula B. Marvin
2001, IMAP 2642
Ganymede is the largest (~5,200 km diameter) of the Jovian satellites. Surficial features on Ganymede, as recorded by the Voyager 1 and 2 spacecraft (Smith and others, 1979a; 1979b), indicate a complex history of crustal formation. Several episodes of crustal modification led to the formation of curvilinear systems of furrows...
Geologic Map of the Lavinia Planitia Quadrangle (V-55), Venus
Mikhail A. Ivanov, James W. Head III
2001, IMAP 2684
Introduction The Lavinia Planitia quadrangle (V-55) is in the southern hemisphere of Venus and extends from 25 to 50 south latitude and from 330 to 360 longitude. It covers the central and northern part of Lavinia Planitia and parts of its margins. Lavinia Planitia consists of a centralized, deformed lowland flooded...
Alteration and mineralization in the eastern part of the Soldier Mountains, Camas County, Idaho
Reed S. Lewis
2001, Bulletin 2064-V
The eastern part of the Soldier Mountains in Camas County, south-central Idaho, is underlain principally by plutonic rocks of Cretaceous and Eocene age that locally have undergone propylitic, potassic, and muscovite-quartz alteration. Muscovite- quartz alteration is Cretaceous in age and is localized along joints and fractures, some of which are filled with quartz. Associated veins have...
Geologic map of the Clifton Quadrangle, Mesa County, Colorado
P. E. Carrara
2001, Miscellaneous Field Studies Map 2359
1:24,000-scale geologic mapping in the Clifton 7.5' quadrangle, in support of the USGS Colorado River/I-70 Corridor Cooperative Geologic Mapping Project, provides interpretations of the Quaternary stratigraphy and geologic hazards in this area of the Grand Valley. The Clifton 1:24,000 quadrangle is in Mesa County in western Colorado. Because the map...
Vein deposits hosted by plutonic rocks in the Croesus Stock and Hailey gold belt mineralized areas, Blaine County, Idaho
Ronald G. Worl, Reed S. Lewis
2001, Bulletin 2064-X
Mineral deposits in the Croesus and Hailey gold belt mineralized areas in Blaine County, south-central Idaho, are preciousand base-metal quartz veins that are part of a family of vein deposits spatially and temporally associated with the Idaho batholith. Historic production from these veins has been mainly gold and silver. Host rocks are older border phase...
The U.S. Geological Survey National Coal Resource Assessment
Brenda S. Pierce
2001, Fact Sheet 020-01
A data management life-cycle
David A. Ferderer
2001, Fact Sheet 163-00
Documented, reliable, and accessible data and information are essential building blocks supporting scientific research and applications that enhance society's knowledge base (fig. 1). The U.S. Geological Survey (USGS), a leading provider of science data, information, and knowledge, is uniquely positioned to integrate science and natural resource information to address societal...
Sediment-quality assessment of Franklin D. Roosevelt Lake and the upstream reach of the Columbia River, Washington, 1992
Gilbert Carl Bortleson, S.E. Cox, M.D. Munn, R.J. Schumaker, E. K. Block
2001, Water Supply Paper 2496
Elevated concentrations of trace elements were found in bed sediment of Lake Roosevelt and the Columbia River, its principal source of inflow. Trace-element concentrations in whole water samples did not exceed criteria for freshwater organisms. Bed sediments of Lake Roosevelt were analyzed for organic compounds associated with wood-pulp waste. Dioxins...
