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

Loamy, two-storied soils on the outwash plains of southwestern lower Michigan: Pedoturbation of loess with the underlying sand

Soils on many of the outwash plains in southwestern Michigan have loamy upper profiles, despite being underlain by sand-textured outwash. The origin of this upper, loamy material has long been unknown. The purpose of this study is to analyze the spatio-textural characteristics of these loamy-textured sediments to ascertain their origin(s). The...

Luehmann, Michael D.; Peter, Brad G.; Connallon, Christopher B.; Schaetzl, Randall J.; Smidt, Samuel J.; Liu, Wei; Kincare, Kevin A.; Walkowiak, Toni A.; Thorlund, Elin; Holler, Marie S.
Luehmann, M. D., Peter, B. G., Connallon, C. B., Schaetzl, R. J., Smidt, S. J., Liu, W., Kincare, K. A., Walkowiak, T. A., Thorlund, E. and Holler, M. S. (2016). Loamy, two-storied soils on the outwash plains of southwestern lower Michigan: Pedoturbation of loess with the underlying sand. Annals of the American Association of Geographers, 106(3), 551-571.

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Year Published: 2016

Modeling abundance using hierarchical distance sampling

In this chapter, we provide an introduction to classical distance sampling ideas for point and line transect data, and for continuous and binned distance data. We introduce the conditional and the full likelihood, and we discuss Bayesian analysis of these models in BUGS using the idea of data augmentation, which we discussed in Chapter 7. We then...

Royle, Andy; Kery, Marc
Kéry, M. and Royle, J.A., 2016, Chapter 8 – Modeling Abundance Using Hierarchical Distance Sampling, in Kéry, M. and Royle, J.A., editors, Applied Hierarchical Modeling in Ecology: Analysis of distribution, abundance and species richness in R and BUGS: Volume 1: Prelude and Static Models: Amsterdam and Boston, Elsevier, p. 393–461.

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Year Published: 2016

Modeling abundance using multinomial N-mixture models

Multinomial N-mixture models are a generalization of the binomial N-mixture models described in Chapter 6 to allow for more complex and informative sampling protocols beyond simple counts. Many commonly used protocols such as multiple observer sampling, removal sampling, and capture-recapture produce a multivariate count frequency that has a...

Royle, Andy
Kéry, M. and Royle, J.A., 2016, Chapter 7 – Modeling Abundance Using Multinomial N-Mixture Models, in Kéry, M. and Royle, J.A., editors, Applied Hierarchical Modeling in Ecology: Analysis of distribution, abundance and species richness in R and BUGS: Volume 1: Prelude and Static Models: Amsterdam and Boston, Elsevier, p. 313–392.

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Year Published: 2016

Natural graphite demand and supply - Implications for electric vehicle battery requirements

Electric vehicles have been promoted to reduce greenhouse gas emissions and lessen U.S. dependence on petroleum for transportation. Growth in U.S. sales of electric vehicles has been hindered by technical difficulties and the high cost of the lithium-ion batteries used to power many electric vehicles (more than 50% of the vehicle cost)....

Olson, Donald W.; Virta, Robert L.; Mahdavi, Mahbood; Sangine, Elizabeth S.; Fortier, Steven M.

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Year Published: 2016

Non-linear responses of glaciated prairie wetlands to climate warming

The response of ecosystems to climate warming is likely to include threshold events when small changes in key environmental drivers produce large changes in an ecosystem. Wetlands of the Prairie Pothole Region (PPR) are especially sensitive to climate variability, yet the possibility that functional changes may occur more rapidly with warming than...

Johnson, W. Carter; Werner, Brett; Guntenspergen, Glenn R.

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Year Published: 2016

Petrology and tectonic history of the Green Bay Schist, Portmore, St. Catherine Parish, Jamaica

There are three occurrences of medium- to high-grade metamorphic rocks in Jamaica: amphibolite facies Westphalia Schist, blueschist/greenschist facies Mt. Hibernia Schist, and the hitherto poorly characterized amphibolite facies Green Bay Schist. New trace element data and thermodynamic calculations show that Green Bay Schist is closely related to...

Abbott, Richard N.; West, David P.; Bandy, Betsy R.; McAleer, Ryan J.
Abbott, R. N. Jr., West, D. P., Bandy, B. R. and Mcaleer, R. J. 2016. Petrology and tectonic history of the Green Bay Schist, Portmore, St. Catherine Parish, Jamaica. Caribbean Journal of Earth Science, 48, 1-18.

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Year Published: 2016

Photoperiod and nesting phenology of whooping cranes at two captive sites

Increasing daylight is known to be a breeding stimulus in many avian species breeding in northern latitudes. This is thought to be true for cranes that breed in such latitudes including the Whooping Crane (Grus americana). For this reason, the captive breeding centers use artificial light to lengthen daylight hours, but no study has been done to...

Olsen, Glenn H.

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Year Published: 2016

Relationship between porphyry systems, crustal preservation levels, and amount of exploration in magmatic belts of the Central Tethys Region

Tectonic, geologic, geochemical, geochronologic, and ore deposit data from the U.S. Geological Survey-led assessment of 26 porphyry belts identified in the central Tethys region of Turkey, the Caucasus, Iran, western Pakistan, and southern Afghanistan relate porphyry mineralization to the tectonomagmatic evolution of the region and associated...

Zürcher, Lukas; Hammarstrom, Jane M.; Mars, John C.; Ludington, Stephen; Zientek, Michael L.

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Year Published: 2016

Seismic velocities within the sedimentary succession of the Canada Basin and southern Alpha-Mendeleev Ridge, Arctic Ocean: evidence for accelerated porosity reduction?

The Canada Basin and the southern Alpha-Mendeleev ridge complex underlie a significant proportion of the Arctic Ocean, but the geology of this undrilled and mostly ice-covered frontier is poorly known. New information is encoded in seismic wide-angle reflections and refractions recorded with expendable sonobuoys between 2007 and 2011. Velocity–...

Shimeld, John; Li, Qingmou; Chian, Deping; Lebedeva-Ivanova, Nina; Jackson, Ruth; Mosher, David; Hutchinson, Deborah R.

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Year Published: 2016

Soil mercury distribution in adjacent coniferous and deciduous stands highly impacted by acid rain in the Ore Mountains, Czech Republic

Forests play a primary role in the cycling and storage of mercury (Hg) in terrestrial ecosystems. This study aimed to assess differences in Hg cycling and storage resulting from different vegetation at two adjacent forest stands - beech and spruce. The study site Načetín in the Czech Republic's Black Triangle received high atmospheric loadings of...

Navrátil, Tomáš; Shanley, James B.; Rohovec, Jan; Oulehle, Filip; Šimeček, Martin; Houška, Jakub; Cudlín, Pavel
Navrátil, T., J.B. Shanley, J. Rohovec, F. Oulehle, M. Šimeček, J. Houška, and P. Cudlín, 2016. Soil mercury distribution in adjacent coniferous and deciduous stands highly impacted by acid rain in the Ore Mountains, Czech Republic, Applied Geochemistry 75: 63-75, ISSN 0883-2927, doi:10.1016/j.apgeochem.2016.10.005.

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Year Published: 2016

Structural geology of the Valley and Ridge and Plateaus provinces

The Valley and Ridge physiographic province comprises the area between the Blue Ridge province on the east and the Appalachian Plateau province on the west. The province consists of Paleozoic carbonate and clastic rocks that were folded and thrust faulted during the Alleghanian orogeny. The Appalachian Plateau province consists of mostly flat...

Evans, Mark A.; Orndorff, Randall C.; Henika, William S.
Evans, M.A., Orndorff, R.C., and Henika, William, 2016, Structural geology of the Valley and Ridge and Plateaus provinces, in Bailey, C.M., Sherwood, W.C., Eaton, L.S., and Powars, D.S., eds., The Geology of Virginia: Virginia Museum of Natural History, Special Publication 18, p. 55-86.

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Year Published: 2016

The swing of it: Hammock camping

Hammock camping is dramatically expanding along the Appalachian Trail and raising both questions and concerns among Trail land managers, club members, and backpackers. This article examines some of the advantages and disadvantages of hammock camping, including resource and social impacts. Some Leave No Trace hammock camping practices are included...

Marion, Jeffrey L.
Marion, Jeffrey L. 2016. The swing of it: Hammock camping. A.T. Journeys, Spring: 12-18.

Filter Total Items: 1,772
Close-up of a honey bee being prepared for testing

Close-up of a honey bee being prepared for testing

Leetown Science Center researcher, Dr. Deborah Iwanowicz, is preparing honey bee for analysis of the Lake Sinai Virus (LSV).   This type of work is important to society as pollinators are critical for sustaining healthy ecosystems and prosperous human populations.

view of snow covered Lake Champlain from Port Henry, NY

Lake Champlain at Port Henry, NY

PLEASE NOTE: During winter months, ice and snow can affect the picture quality. The camera is cleaned as often as it is safe to do so.

Lake Champlain at Port Henry, NY (04294413)

Photograph of Head of the Meadow Beach shoreline

Head of the Meadow Beach video camera 2 variance image

Two video cameras are mounted on a bluff near Head of the Meadow Beach, Cape Cod National Seashore, North Truro, MA. One camera looks directly offshore (north east), and the second looks alongshore (north-northeast). A “variance” image shows the standard deviation of pixel intensity throughout the video, and it is useful for determining how much variation or movement is

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view of boats, piers, and bridge on Reynolds Channel

Reynolds Channel at Point Lookout, NY

Latest webcam image of Reynolds Channel (01310740).

Image timestamp is in Eastern Standard Time.
Webcam is located on tower at USGS gaging station, looking west-northwest toward Loop Parkway Bridge.

Adult silver phase American Eel

Adult silver phase American Eel

A silver-phase American Eel in a northeastern river begins migrating downstream to the ocean to spawn in the Sargasso Sea. The migration can span hundreds of kilometers in freshwater rivers and thousands of kilometers at sea.

Photograph of Head of the Meadow Beach shoreline

Head of the Meadow Beach video camera 1 timex image

Two video cameras are mounted on a bluff near Head of the Meadow Beach, Cape Cod National Seashore, North Truro, MA. One camera looks directly offshore (north east), and the second looks alongshore (north-northeast). A timex is a time-averaged image of all frames, smoothing away surface waves and determining the location of persistent wave-breaking (indicative of shallow

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