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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 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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Assessment of Appalachian basin oil and gas resources: Utica-Lower Paleozoic Total Petroleum System Assessment of Appalachian basin oil and gas resources: Utica-Lower Paleozoic Total Petroleum System
The Utica-Lower Paleozoic Total Petroleum System (TPS) in the Appalachian Basin Province is named for the Upper Ordovician Utica Shale, which is the source rock, and for multiple lower Paleozoic sandstone and carbonate units that are the important reservoirs. The total organic carbon (TOC) values for the Utica Shale are usually greater than 1 weight percent. TOC values ranging from 2 to...
Authors
Robert T. Ryder
Bathymetric Terrain Model of the Puerto Rico Trench and the Northeastern Caribbean Region for Marine Geological Investigations Bathymetric Terrain Model of the Puerto Rico Trench and the Northeastern Caribbean Region for Marine Geological Investigations
Multibeam bathymetry data collected in the Puerto Rico Trench and Northeast Caribbean region are compiled into a seamless bathymetric terrain model for broad-scale geological investigations of the trench system. These data, collected during eight separate surveys between 2002 and 2013, covering almost 180,000 square kilometers are published here in large format map sheet and digital...
Authors
Brian D. Andrews, Uri S. ten Brink, William W. Danforth, Jason D. Chaytor, J Granja-Bruna, A Carbo-Gorosabel
Best practices for continuous monitoring of temperature and flow in wadeable streams Best practices for continuous monitoring of temperature and flow in wadeable streams
The United States Environmental Protection Agency (U.S. EPA) is working with its regional offices, states, tribes, river basin commissions and other entities to establish Regional Monitoring Networks (RMNs) for freshwater wadeable streams. To the extent possible, uninterrupted, biological, temperature and hydrologic data will be collected on an ongoing basis at RMN sites, which are...
Authors
Jen Stamp, Anna I. Hamilton, Michelle Craddock, Laila Parker, Allison H. Roy, Daniel J. Isaak, Zachary Holden, Margaret Passmore, Britta Bierwagen
Bituminous coal production in the Appalachian basin: past, present, and future Bituminous coal production in the Appalachian basin: past, present, and future
Although small quantities of coal first were produced from the Appalachian basin in the early 1700s, the first production statistics of significance were gathered during the census of 1830 (Eavenson, 1942). Since then, about 35 billion short tons of bituminous coal have been produced from the Appalachian basin from an original potential coal reserve (PCR(o)) estimated to range from about...
Authors
Robert C. Milici, Desiree E. Polyak
Chapter A2. Selection of equipment for water sampling Chapter A2. Selection of equipment for water sampling
The National Field Manual for the Collection of Water-Quality Data (National Field Manual) describes protocols and provides guidelines for U.S. Geological Survey (USGS) personnel who collect data used to assess the quality of the Nation's surface-water and ground-water resources. This chapter of the manual addresses the selection of equipment commonly used by USGS personnel to collect...
Authors
Franceska D. Wilde, Mark W. Sandstrom, Stanley C. Skrobialowski
Chapter A7. Section 7.1. Fecal indicator bacteria Chapter A7. Section 7.1. Fecal indicator bacteria
Fecal indicator bacteria are used to assess the microbiological quality of water because, although not typically disease causing, they are correlated with the presence of several waterborne disease-causing organisms. The concentration of indicator bacteria is a measure of water safety for body-contact recreation or for consumption. This report provides information on the equipment...
Authors
Donna N. Myers, Marc A. Sylvester
Characterization of deep coral and sponge communities in the Gulf of the Farallones National Marine Sanctuary: Rittenburg Bank, Cochrane Bank and the Farallon Escarpment. Characterization of deep coral and sponge communities in the Gulf of the Farallones National Marine Sanctuary: Rittenburg Bank, Cochrane Bank and the Farallon Escarpment.
Benthic surveys were conducted in the Gulf of Farallones National Marine Sanctuary (GFNMS) aboard R/V Fulmar, October 3-11, 2012 using the large observation-class remotely operated vehicle (ROV) Beagle. The purpose of the surveys was to groundtruth mapping data collected in 2011, and to characterize the seafloor biota, particularly corals and sponges, in order to support Essential Fish...
Authors
P. Etnoyer, Guy R. Cochrane, E. Salgado, K. Graiff, J. Roletto, G.J. Williams, K. Reyna, J. Hyland
Coal and coalbed-methane resources in the Appalachian and Black Warrior basins: maps showing the distribution of coal fields, coal beds, and coalbed-methane fields Coal and coalbed-methane resources in the Appalachian and Black Warrior basins: maps showing the distribution of coal fields, coal beds, and coalbed-methane fields
The maps contained in this chapter show the locations of coal fields, coal beds assessed by the U.S. Geological Survey (USGS) in 2000, and coalbed-methane fields in the central and southern Appalachian basin study areas, which include the coal-producing parts of the Black Warrior basin. The maps were compiled and modified from a variety of sources such as Tully (1996), Northern and...
Authors
Michael H. Trippi, Leslie F. Ruppert, Robert C. Milici, Scott A. Kinney
Coal and petroleum resources in the Appalachian basin: distribution, geologic framework, and geochemical character Coal and petroleum resources in the Appalachian basin: distribution, geologic framework, and geochemical character
Fossil fuels from the Appalachian basin region have been major contributors to the Nation’s energy supplies over much of the last three centuries. Appalachian coal and petroleum resources are still available in sufficient quantities to contribute significantly to fulfilling the Nation’s energy needs. Although both conventional oil and gas continue to be produced in the Appalachian basin...
Coal and petroleum resources in the Appalachian basin: index maps of included studies Coal and petroleum resources in the Appalachian basin: index maps of included studies
This chapter B.1 of U.S. Geological Survey (USGS) Professional Paper 1708 provides index maps for many of the studies described in other chapters of the report. Scientists of the USGS and State geological surveys studied coal and petroleum resources in the central and southern Appalachian structural basins. In the southern Appalachian basin, studies focused on the coal-bearing parts of...
Authors
Leslie F. Ruppert, Michael H. Trippi, Scott A. Kinney
Coal assessments and coal research in the Appalachian basin Coal assessments and coal research in the Appalachian basin
Coal is one of our most important domestic energy resources, producing 37 percent of the Nation’s electricity in 2012. Coal mining within the Appalachian basin has been ongoing for three centuries and, cumulatively, the basin is the most productive coal region in the United States. In 2012, only the Powder River basin produced more coal than the Appalachian basin. Coal is the most...
Authors
Susan J. Tewalt, Leslie F. Ruppert
Coalbed-methane production in the Appalachian basin Coalbed-methane production in the Appalachian basin
Coalbed methane (CBM) occurs in coal beds of Mississippian and Pennsylvanian (Carboniferous) age in the northern, central, and southern Appalachian basin coal regions, which extend almost continuously from Pennsylvania southward to Alabama. Most commercial CBM production in the Appalachian basin is from three structural subbasins: (1) the Dunkard basin in Pennsylvania, Ohio, and northern...
Authors
Robert C. Milici, Desiree E. Polyak