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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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Evolution of crystalline target rocks and impactites in the chesapeake bay impact structure, ICDP-USGS eyreville B core Evolution of crystalline target rocks and impactites in the chesapeake bay impact structure, ICDP-USGS eyreville B core
The 1766-m-deep Eyreville B core from the late Eocene Chesapeake Bay impact structure includes, in ascending order, a lower basement-derived section of schist and pegmatitic granite with impact breccia dikes, polymict impact breccias, and cataclas tic gneiss blocks overlain by suevites and clast-rich impact melt rocks, sand with an amphibolite block and lithic boulders, and a 275-m-thick...
Authors
J. Wright Horton, Michael J. Kunk, Harvey E. Belkin, John N. Aleinikoff, John C. Jackson, I.-M. Chou
Geophysical setting of western Utah and eastern Nevada between latitudes 37°45′ and 40°N Geophysical setting of western Utah and eastern Nevada between latitudes 37°45′ and 40°N
Gravity and aeromagnetic data refine the structural setting for the region of western Utah and eastern Nevada between Snake and Hamlin Valleys on the west and Tule Valley on the east. These data are used here as part of a regional analysis. An isostatic gravity map shows large areas underlain by gravity lows, the most prominent of which is a large semi-circular low associated with the...
Authors
Edward A. Mankinen, Edwin H. McKee
Global irrigated area maps (GIAM) and statistics using remote sensing Global irrigated area maps (GIAM) and statistics using remote sensing
No abstract available.
Authors
Prasad S. Thenkabail, Y.J. Li, Chandrashekhar M. Biradar, Murali Krishna Gumma, Praveen Noojipady, Venkateswarlu Dheeravath, Manohar Velpuri, Obi Reddy P. Gangalakunta
Global Map of Rainfed Cropland Areas (GMRCA) and statistics using remote sensing Global Map of Rainfed Cropland Areas (GMRCA) and statistics using remote sensing
No abstract available.
Authors
Chandrashekhar M. Biradar, Prasad S. Thenkabail, Praveen Noojipady, Y.J. Li, Venkateswarlu Dheeravath, Manohar Velpuri, Hugh Turral, Xueliang L. Cai, Murali Krishna Gumma, Obi Reddy P. Gangalakunta
Historic geomorphology of the San Pedro River: archival and physical evidence Historic geomorphology of the San Pedro River: archival and physical evidence
No abstract available.
Authors
R. Hereford, Julio L. Betancourt
Hydrologic processes and the water budget: Chapter 2 Hydrologic processes and the water budget: Chapter 2
This chapter focuses on the hydrological setting of Mirror Lake and its water budget. It first describes the glacial deposits and bedrock topography in the Mirror Lake area. It then provides an overview of the hydrologic processes associated with Mirror Lake and examines the field and analytical methods used to determine its water budget. It presents results from the hydrologic studies...
Authors
Donald O. Rosenberry, Thomas C. Winter
Ice and water on Newberry Volcano, central Oregon Ice and water on Newberry Volcano, central Oregon
Newberry Volcano in central Oregon is dry over much of its vast area, except for the lakes in the caldera and the single creek that drains them. Despite the lack of obvious glacial striations and well-formed glacial moraines, evidence indicates that Newberry was glaciated. Meter-sized foreign blocks, commonly with smoothed shapes, are found on cinder cones as far as 7 km from the caldera...
Authors
Julie M. Donnelly-Nolan, Robert A. Jensen
Improving conceptual models of water and carbon transfer through peat Improving conceptual models of water and carbon transfer through peat
Northern peatlands store 500 × 1015 g of organic carbon and are very sensitive to climate change. There is a strong conceptual model of sources, sinks, and pathways of carbon within peatlands, but challenges remain both in understanding the hydrogeology and the linkages between carbon cycling and peat pore water flow. In this chapter, research findings from the glacial Lake Agassiz...
Authors
Jeffery M. McKenzie, Donald I. Siegel, Donald O. Rosenberry
Irrigated areas of India derived from satellite sensors and national statistics: A way forward from GIAM experience Irrigated areas of India derived from satellite sensors and national statistics: A way forward from GIAM experience
No abstract available.
Authors
Prasad S. Thenkabail, Maji Amal Kumar, Chandrashekhar M. Biradar, Praveen Noojipady, G. Chandrakantha, Venkateswarlu Dheeravath, Manohar Velpuri, Obi Reddy P. Gangalakunta
Length frequency, condition, growth, and catch per effort indices for common North American fishes Length frequency, condition, growth, and catch per effort indices for common North American fishes
One of the greatest advantages to using standard sampling is the ability of compare sample data to those data collected from an array of other populations over a wide geographic area using similar techniques. A biologist can then ascertain if the sampling data are within an expected range or are higher or lower than expected when compared to other populations.. When biologists collect...
Authors
Mark J. Brouder, Alison C. Ilses, Scott A. Bonar
Lessons and insights from evolution, taxonomy, and conservation genetics Lessons and insights from evolution, taxonomy, and conservation genetics
No abstract available.
Authors
Melanie Culver