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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 82,000 reports 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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Depositional setting of the hoskinnini member of the Triassic Moenkopi Formation, southeastern Utah Depositional setting of the hoskinnini member of the Triassic Moenkopi Formation, southeastern Utah
No abstract available.
Authors
Russell F. Dubiel, Jacqueline E. Huntoon, John D. Stanesco, Stephen T. Hasiotis
Description of landscape features, summary of existing hydrologic data, and identification of data gaps for the Osage Nation, northeastern Oklahoma, 1890-2012 Description of landscape features, summary of existing hydrologic data, and identification of data gaps for the Osage Nation, northeastern Oklahoma, 1890-2012
The Osage Nation of northeastern Oklahoma, conterminous with Osage County, is characterized by gently rolling uplands and incised stream valleys that have downcut into underlying sedimentary rock units of Pennsylvanian through Permian age. Cattle ranching and petroleum and natural-gas extraction are the principal land uses in this rural area. Freshwater resources in the Osage Nation...
Authors
William J. Andrews, S. Jerrod Smith
Design of a sediment-monitoring gaging network on ephemeral tributaries of the Colorado River in Glen, Marble, and Grand Canyons, Arizona Design of a sediment-monitoring gaging network on ephemeral tributaries of the Colorado River in Glen, Marble, and Grand Canyons, Arizona
Management of sediment in rivers downstream from dams requires knowledge of both the sediment supply and downstream sediment transport. In some dam-regulated rivers, the amount of sediment supplied by easily measured major tributaries may overwhelm the amount of sediment supplied by the more difficult to measure lesser tributaries. In this first class of rivers, managers need only know...
Authors
Ronald E. Griffiths, David J. Topping, Robert S. Anderson, Gregory S. Hancock, Theodore S. Melis
Determination of human-use pharmaceuticals in filtered water by direct aqueous injection: high-performance liquid chromatography/tandem mass spectrometry Determination of human-use pharmaceuticals in filtered water by direct aqueous injection: high-performance liquid chromatography/tandem mass spectrometry
This report describes a method for the determination of 110 human-use pharmaceuticals using a 100-microliter aliquot of a filtered water sample directly injected into a high-performance liquid chromatograph coupled to a triple-quadrupole tandem mass spectrometer using an electrospray ionization source operated in the positive ion mode. The pharmaceuticals were separated by using a...
Authors
Edward T. Furlong, Mary C. Noriega, Christopher J. Kanagy, Leslie K. Kanagy, Laura J. Coffey, Mark R. Burkhardt
Developing tools to eradicate ecologically destructive ants on Rose Atoll: effectiveness and attractiveness of formicidal baits Developing tools to eradicate ecologically destructive ants on Rose Atoll: effectiveness and attractiveness of formicidal baits
A key factor contributing to the decline in the population of Pisonia grandis on Rose Atoll is an infestation of the non-native scale, Pulvinaria urbicola (Homoptera: Coccidae). Ants, in facultative relationships with scale insects, may facilitate scale population growth and increase their effect on plant hosts. Three ant species found on Rose Atoll, Tetramorium bicarinatum, T...
Authors
Robert Peck, Paul Banko, Frank Pendleton
Development of a regionally consistent geospatial dataset of agricultural lands in the Upper Colorado River Basin, 2007-10 Development of a regionally consistent geospatial dataset of agricultural lands in the Upper Colorado River Basin, 2007-10
Irrigation in arid environments can alter the natural rate at which salts are dissolved and transported to streams. Irrigated agricultural lands are the major anthropogenic source of dissolved solids in the Upper Colorado River Basin (UCRB). Understanding the location, spatial distribution, and irrigation status of agricultural lands and the method used to deliver water to agricultural...
Authors
Susan G. Buto, Brittany L. Gold, Kimberly A. Jones
Development of flood-inundation maps for the Mississippi River in Saint Paul, Minnesota Development of flood-inundation maps for the Mississippi River in Saint Paul, Minnesota
Digital flood-inundation maps for a 6.3-mile reach of the Mississippi River in Saint Paul, Minnesota, were developed through a multi-agency effort by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers and in collaboration with the National Weather Service. The inundation maps, which can be accessed through the U.S. Geological Survey Flood Inundation Mapping...
Authors
Christiana R. Czuba, James D. Fallon, Corby R. Lewis, Diane F. Cooper
Diet composition and fish consumption of double-crested cormorants from three St. Lawrence River colonies in 2013 Diet composition and fish consumption of double-crested cormorants from three St. Lawrence River colonies in 2013
Double-crested Cormorants (Phalacrocorax auritus) were first observed nesting in the upper St. Lawrence River at Strachan Island in 1992. Cormorants now nest at a number of islands in the Thousand Islands section of the river. Griswold, McNair, and Strachan islands are among the largest colonies in the upper river. Until 2011, nest counts had remained relatively stable, ranging from 200...
Authors
James H. Johnson, James F. Farquhar, Irene M. Mazzocchi, Anne Bendig
Digital data for preliminary geologic map of the Mount Hood 30- by 60-minute quadrangle, northern Cascade Range, Oregon Digital data for preliminary geologic map of the Mount Hood 30- by 60-minute quadrangle, northern Cascade Range, Oregon
The Mount Hood 30- by 60-minute quadrangle covers the axis and east flank of the Cascade Range in northern Oregon. Its namesake, Mount Hood volcano, dominates the view in the northwest quarter of the quadrangle, but the entire area is underlain by Oligocene and younger volcanic and volcaniclastic rocks of the Cascade Range. Since the time of the Columbia River Basalt Group about 15...
Authors
Lina Ma, David R. Sherrod, William E. Scott
Digital data in support of studies and assessments of coal and petroleum resources in the Appalachian basin Digital data in support of studies and assessments of coal and petroleum resources in the Appalachian basin
The Appalachian basin is a mature basin containing abundant oil, gas, and coal resources. Its fossil-fuel-bearing strata range in age from Cambrian to Permian and extend over the States of New York, Pennsylvania, Maryland, Ohio, West Virginia, Virginia, Kentucky, Tennessee, Georgia, and Alabama. The basin has provided abundant fossil fuels to support the Nation’s economic growth for at...
Authors
Michael H. Trippi, Scott A. Kinney, Gregory L. Gunther, Robert T. Ryder, Leslie F. Ruppert
Digital database of microfossil localities in Alameda and Contra Costa Counties, California Digital database of microfossil localities in Alameda and Contra Costa Counties, California
The eastern San Francisco Bay region (Contra Costa and Alameda Counties, California) is a geologically complex area divided by faults into a suite of tectonic blocks. Each block contains a unique stratigraphic sequence of Tertiary sediments that in most blocks unconformably overlie Mesozoic sediments. Age and environmental interpretations based on analysis of microfossil assemblages are...
Authors
Kristin McDougall, Debra L. Block
Digital Mapping Techniques '11–12 workshop proceedings Digital Mapping Techniques '11–12 workshop proceedings
The Digital Mapping Techniques '11 (DMT'11) workshop was hosted by Virginia Division of Geology and Mineral Resources and The College of William & Mary, and coordinated by the National Geologic Map Database project. Conducted May 22-25 on the campus of The College of William & Mary, in Williamsburg, Virginia, it was attended by 77 technical experts from 30 agencies, universities, and...
Authors
David R. Soller