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: 16,199
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Year Published: 2016

Gemstones in 2015

No abstract available.

Olson, Donald W.

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Year Published: 2016

Gypsum in 2015

No abstract available.

Crangle, Robert

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Year Published: 2016

Mining Review in 2015

No abstract available.

Ober, Joyce A.

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Year Published: 2016

Nitrogen in 2015

No abstract available.

Apodaca, Lori E.
Industrial Minerals review 2015, Mining Engineering, 2016, Vol. 68, No. 7, pp. 30

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Year Published: 2016

Peat in 2015

No abstract available.

Apodaca, Lori E.

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Year Published: 2016

Potash in 2015

No abstract available.

Jasinski, Stephen M.

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Year Published: 2016

Predicting arsenic in drinking water wells of the Central Valley, California

Probabilities of arsenic in groundwater at depths used for domestic and public supply in the Central Valley of California are predicted using weak-learner ensemble models (boosted regression trees, BRT) and more traditional linear models (logistic regression, LR). Both methods captured major processes that affect arsenic concentrations, such as...

Ayotte, Joseph D.; Nolan, Bernard T.; Gronberg, JoAnn M.
Ayotte, J.D., Nolan, B.T., and Gronberg, J.A., 2016, Predicting arsenic in drinking water wells of the Central Valley, California: Environmental Science and Technology, v. 50, no. 14, p. 7555-7563, DOI: 10.1021/acs.est.6b01914.

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Year Published: 2016

Pumice in 2015

No abstract available.

Crangle, Robert

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Year Published: 2016

Rare Earths, 2015

No abstract available.

Gambogi, Joseph

Filter Total Items: 1,774
Shaded relief and  combined bathymetry map of Puerto Rico
December 31, 2008

Shaded relief and combined bathymetry map of Puerto Rico

(Top image) Shaded relief of the new multibeam bathymetry along the Puerto Rico Trench illuminated from the northwest. Thin contours indicate bathymetry at 500-m intervals. (Bottom image) Combined bathymetry map of the multibeam bathymetry data, single-beam bathymetry compilation around Puerto Rico, Lidar data near shore, and topography of Puerto Rico. Contour interval is

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Photograph of USGS scientists standing in front of a helicopter
December 31, 2008

Remote places

Woods Hole Coastal and Marine Science Center's Ellyn Montgomery (right) on the helipad of the Canadian Coast Guard Vessel Louis St. Laurent returning from an ice reconnaissance flight as part of a joint study mapping the foot of the continental slope in the Arctic Ocean in 2008

Static stress change models
December 31, 2008

Static stress change models

Static stress change models for known or hypothesized faults in the Hispaniola and Puerto Rico subduction segments due to (a) slip on a patch of the Puerto Rico subduction zone, and (b) slip on a patch of the Hispaniola subduction zone. An open arrow denotes slip direction and the patches are marked by dashed rectangles. Heavy black lines are simplified fault traces.

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Photograph of  Instrumented Pressure Testing Chamber body
December 31, 2008

Instrumented Pressure Testing Chamber

A pressurized, stable, hydrate-bearing sediment core can be fed through the IPTC body, shown here being used in Singapore to support the Indian National Gas Hydrates Program (NGHP1)