Unified Interior Regions

Region 1: North Atlantic-Appalachian

Our Science Centers

Our Science Centers

The NAA Region has 15 Science Centers spanning 14 NE States and Washington, DC. The Centers conduct interdisciplinary biologic, geologic, hydrologic, and energy monitoring and research addressing natural resource issues facing our nation.

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August and September Photo Contests

August and September Photo Contests

Check out the winning photographs in the August and September 2021 Photo Contests! Categories include People, USGS at Work, Where We Work, and Honorable Mention.

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Regions L2 Landing Page Tabs

Filter Total Items: 16,165
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Year Published: 2016

A hierarchical model of daily stream temperature using air-water temperature synchronization, autocorrelation, and time lags

Water temperature is a primary driver of stream ecosystems and commonly forms the basis of stream classifications. Robust models of stream temperature are critical as the climate changes, but estimating daily stream temperature poses several important challenges. We developed a statistical model that accounts for many challenges that can make...

Letcher, Benjamin H.; Hocking, Daniel; O'Neil, Kyle; Whiteley, Andrew R.; Nislow, Keith H.; O'Donnell, Matthew
Letcher BH, Hocking DJ, O’Neil K, Whiteley AR, Nislow KH, O’Donnell MJ. (2016) A hierarchical model of daily stream temperature using air-water temperature synchronization, autocorrelation, and time lags. PeerJ 4:e1727 https://doi.org/10.7717/peerj.1727

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Year Published: 2016

Assessment of canyon wall failure process from multibeam bathymetry and Remotely Operated Vehicle (ROV) observations, U.S. Atlantic continental margin

Over the last few years, canyons along the northern U.S. Atlantic continental margin have been the focus of intensive research examining canyon evolution, submarine geohazards, benthic ecology and deep-sea coral habitat. New high-resolution multibeam bathymetry and Remotely Operated Vehicle (ROV) dives in the major shelf-breaching and minor slope...

Lamarche, Geoffroy; Mountjoy, Joshu; Bull, Suzanne; Hubble, Tom; Krastel, Sebastian; Lane, Emily; Micallef, Aaron; Moscardelli, Lorena; Mueller, Christof; Pecher, Ingo; Woelz, Susanne; Chaytor, Jason D.; Demopoulos, Amanda W.J.; ten Brink, Uri S.; Baxter, Christopher D. P.; Quattrini, Andrea M.; Brothers, Daniel S.

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Year Published: 2016

The “Anthropocene” epoch: Scientific decision or political statement?

The proposal for the “Anthropocene” epoch as a formal unit of the geologic time scale has received extensive attention in scientific and public media. However, most articles on the Anthropocene misrepresent the nature of the units of the International Chronostratigraphic Chart, which is produced by the International Commission on...

Finney, Stanley C.; Edwards, Lucy E.
GSA Today, v. 26, no. 3–4

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Year Published: 2016

Tarangire revisited: Consequences of declining connectivity in a tropical ungulate population

The hyper-abundance of migratory wildlife in many ecosystems depends on maintaining access to seasonally available resources. In Eastern and Southern Africa, land-use change and a loss of connectivity have coincided with widespread declines in the abundance and geographic range of ungulate populations. Using photographic capture-mark-recapture, we...

Morrison, Thomas A.; Link, William A.; Newmark, William D.; Foley, Charles A.H.; Bolger, Douglas T.
Morrison, T. A., Link, W. A., Newmark, W. D., Foley, C. A. H., and Bolger, D. T., 2016, Tarangire revisited: Consequences of declining connectivity in a tropical ungulate population: Biological Conservation, v. 197, p. 53-60.

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Year Published: 2016

Reevaluating the age of the Walden Creek Group and the kinematic evolution of the western Blue Ridge, southern Appalachians

An integrated synthesis of existing datasets (detailed geologic mapping, geochronologic, paleontologic, geophysical) with new paleontologic and geochemical investigations of rocks previously interpreted as part of the Neoproterozoic Walden Creek Group in southeastern Tennessee suggest a necessary reevaluation of the kinematics and structural...

Thigpen, J. Ryan; Hatcher, Robert D.; Kah, Linda C.; Repetski, John E.

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Year Published: 2016

Elevation dynamics in a restored versus a submerging salt marsh in Long Island Sound

Accelerated sea-level rise (SLR) poses the threat of salt marsh submergence, especially in marshes that are relatively low-lying. At the same time, restoration efforts are producing new low-lying marshes, many of which are thriving and avoiding submergence. To understand the causes of these different fates, we studied two Long Island Sound marshes...

Anisfeld, Shimon C.; Hill, Troy D.; Cahoon, Donald R.

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Year Published: 2016

Progress and challenges in coupled hydrodynamic-ecological estuarine modeling

Numerical modeling has emerged over the last several decades as a widely accepted tool for investigations in environmental sciences. In estuarine research, hydrodynamic and ecological models have moved along parallel tracks with regard to complexity, refinement, computational power, and incorporation of uncertainty. Coupled hydrodynamic-ecological...

Ganju, Neil K.; Brush, Mark J.; Rashleigh, Brenda; Aretxabaleta, Alfredo L.; del Barrio, Pilar; Grear, Jason S.; Harris, Lora A.; Lake, Samuel J.; McCardell, Grant; O'Donnell, James; Ralston, David K.; Signell, Richard P.; Testa, Jeremy; Vaudrey, Jamie M. P.
Ganju, N.K., Brush, M.J., Rashleigh, B. et al. Estuaries and Coasts (2016) 39: 311. https://doi.org/10.1007/s12237-015-0011-y

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Year Published: 2016

Elastic stress transmission and transformation (ESTT) by confined liquid: A new mechanics for fracture in elastic lithosphere of the earth

We report on a new mechanical principle, which suggests that a confined liquid in the elastic lithosphere has the potential to transmit a maximum applied compressive stress. This stress can be transmitted to the internal contacts between rock and liquid and would then be transformed into a normal compressive stress with tangential tensile stress...

Xu, Xing-Wang; Peters, Stephen; Liang, Guang-He; Zhang, Bao-Lin
Xu, Xing-Wang, Peters, Stephen G., Liang, Guang-He, and Zhang, Bao-Lin, 2016, mechanics for fracture in elastic lithosphere of the earth: Tectonophysics 672–673 (2016) 129–138

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Year Published: 2016

Physical, chemical, and biological characteristics of selected headwater streams along the Allegheny Front, Blair County, Pennsylvania, July 2011–September 2013

The Altoona Water Authority (AWA) obtains all of its water supply from headwater streams that drain western Blair County, an area underlain in part by black shale of the Marcellus Formation. Development of the shale-gas reservoirs will require new access roads, stream crossing, drill-pad construction, and pipeline installation, activities that...

Low, Dennis J.; Brightbill, Robin A.; Eggleston, Heather L.; Chaplin, Jeffrey J.
Low, D.J., Brightbill, R.A., Eggleston, H.L., and Chaplin, J.J., 2016, Physical, chemical, and biological characteristics of selected headwater streams along the Allegheny Front, Blair County, Pennsylvania, July 2011–September 2013: U.S. Geological Survey Open-File Report 2015–1173, 66 p., http://dx.doi.org/10.3133/ofr20151173.

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Year Published: 2016

Distribution and diversity of tunicates utilizing eelgrass as substrate in the western North Atlantic between 39° and 47° north latitude (New Jersey to Newfoundland)

Seagrass meadows are ecologically important habitats that are declining globally at an accelerating rate due to natural and anthropogenic stressors. Their decline is a serious concern as this habitat provides many ecosystem services. Eelgrass (Zostera marina) is the dominant seagrass species in the western North Atlantic. It has recently been...

Carman, M R; Colarusso, Phillip D; Nelson, Eric P; Grunden, David W; Wong, Melisa C; McKenzie, Cynthia; Matheson, Kyle; Davidson, Jeffrey G.; Fox, Sophia; Neckles, Hilary A.; Bayley, Holly; Schott, Stephen; Dijkstra, Jennifer A; Stewart-Clark, Sarah
Carman, M. R., Colarusso, P. D., Nelson, E. P., Grunden, D. W., Wong, M. C., McKenzie, C., Matheson, K., Davidson, J., Fox, S., Neckles, H. A., Bayley, H., Schott, S., Dijkstra, J. A., and Stewart-Clark, S., 2016, Distribution and diversity of tunicates utilizing eelgrass as substrate in the western North Atlantic between 39° and 47° north latitude (New Jersey to Newfoundland) : Management of Biological Invasions, v. 7, no. 1, p. 51-57.

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Year Published: 2016

Arsenic in groundwater of Licking County, Ohio, 2012—Occurrence and relation to hydrogeology

Arsenic concentrations were measured in samples from 168 domestic wells in Licking County, Ohio, to document arsenic concentrations in a wide variety of wells and to identify hydrogeologic factors associated with arsenic concentrations in groundwater. Elevated concentrations of arsenic (greater than 10.0 micrograms per liter [µg/L]) were detected...

Thomas, Mary Ann
Thomas, M.A., 2016, Arsenic in groundwater of Licking County, Ohio, 2012—Occurrence and relation to hydrogeology: U.S. Geological Survey Scientific Investigations Report 2015–5148, 38 p., http://dx.doi.org/10.3133/sir20155148.

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Year Published: 2016

The effectiveness of water-treatment systems for arsenic used in 11 homes in Southwestern and Central Ohio, 2013

In 2013, the U.S. Geological Survey and the Miami Conservancy District investigated the effectiveness of methods used to remove arsenic from drinking water at 11 homes in southwestern and central Ohio. The untreated (raw) ground-water had arsenic concentrations of 7.7–382 micrograms per liter (µg/L), and the median concentration was 30 µg/L. The...

Thomas, Mary Ann; Ekberg, Mike
Thomas, M.A., and Ekberg, Mike, 2016, The effectiveness of water-treatment systems for arsenic used in 11 homes in Southwestern and Central Ohio, 2013: U.S. Geological Survey Scientific Investigations Report 2015–5156, 26 p., http://dx.doi.org/10.3133/sir20155156.

Filter Total Items: 1,772
2 USGS scientists in inflatable boat on tidal marsh on Long Island
November 30, 2000

Water sampling in tidal marsh on Long Island

USGS scientists taking water samples in the tidal marsh on Long Island.

Groundwater sampling array Cape Cod Massachusetts
June 27, 2000

Groundwater sampling array

Groundwater sampling array at the Toxics Substances research site, Cape Cod, Massachusetts

photo of USGS staffer holding a groundwater sample bottle inside a plastic box
April 10, 2000

Groundwater sampling

Groundwater sampling on Long Island

photo of 3 women beside Long Island road measuring groundwater with instrumentation
March 1, 2000

Groundwater Sampling on Long Island

Groundwater sampling for water quality on Long Island, New York

White tanks used to hold the tracer injection solutions with tubing going to injection wells
April 6, 1999

Antibiotics in Groundwater Tracer Injection

U.S. Geological Survey (USGS) scientists conducted a unique study, which demonstrated that the ecology of natural groundwater bacteria changed after exposure of the bacteria to the antibiotic sulfamethoxazole (SMX). The study was conducted within the zone of the historic wastewater-contamination plume at the

...
Aerial view of Assateague Island
December 31, 1998

Aerial view of Assateague Island

Aerial view of Assateague Island, looking north. Ocean City, Maryland, is visible in the far distance at top. Sinepuxent Bay lies between the island’s western shore and the Delmarva Peninsula to the upper left. Photograph taken in 1998 

Connecticut River, Holyoke Dam during flood of March 1936
March 31, 1936

Connecticut River, Holyoke Dam during flood of March 1936

Connecticut River Holyoke Dam, Holyoke Water Power Company, during flood of March 1936.