Regions

Maryland

States L2 Landing Page Tabs

Maryland's water supply comes from streams, rivers, groundwater and reservoirs. Many of these systems flow to the Chesapeake Bay, the Nation's largest estuary. This complex ecosystem has been degraded due to the impact of human-population increase. The MD-DC-DE Water Science Center studies the impacts this has on water quality, habitats and biological communities.

Maryland Water

Maryland - Delaware - Washington D.C. Water Science Center

Maryland -  Delaware - Washington D.C. Water Science Center

5522 Research Park Drive
Catonsville, MD 21228

Phone: 443-498-5500
Fax: 442-498-5510

MD-DE-DC Water

Patuxent Wildlife Research Center

Patuxent Wildlife Research Center

12100 Beech Forest Road
Laurel, MD 20708-4039

Phone: 301-497-5000

Patuxent Research

News

Date published: November 18, 2019

Green Stormwater Infrastructure to Reduce Suburban Stormwater Runoff

A new study finds that a high density of green stormwater infrastructure can provide enhanced mitigation of peak flows and runoff volumes compared to large, detention-based stormwater control practices.

Date published: October 3, 2019

USGS Estimates 214 trillion Cubic Feet of Natural Gas in Appalachian Basin Formations

The Marcellus Shale and Point Pleasant-Utica Shale formations of the Appalachian Basin contain an estimated mean of 214 trillion cubic feet of undiscovered, technically recoverable continuous resources of natural gas, according to new USGS assessments.

Date published: September 5, 2019

USGS Scientists Document Hurricane Dorian’s Impacts

Editor’s Note: This story was revised Sept. 10, 2019 to include the later phases of USGS’ response to Hurricane Dorian.

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Dorian, visit the USGS Hurricane Dorian page at www.usgs.gov/dorian.

Filter Total Items: 96
USGS
Date Published: June 26, 2019
Status: Active

Information by Region - Maryland

  

Team of scientists stand in front of outcrop
Date Published: June 4, 2019
Status: Active

Appalachian Basin Geologic Mapping Project

The Appalachian Basin Geologic Mapping Project performs geologic mapping at local and regional scales, and geologic research in The Valley and Ridge and Appalachian Plateaus physiographic provinces. These provinces include parts of 11 states and mainly borders the Blue Ridge / Piedmont and North Interior Lowlands Provinces. Two states have Valley and Ridge geology only (GA, NJ), two have...

Application to explore US Oil and Gas Assessments
Date Published: April 19, 2019
Status: Active

United States Assessments of Undiscovered Oil and Gas Resources

USGS Energy Resources Program provides periodic assessments of the oil and natural gas endowment of the United States and the World (click here for information about World Oil and Gas Assessments).  This website provides access to new, prioritized, assessment results and supporting data for the United States, as part...

Researcher samples sediments on exposed cliff face.
Date Published: March 28, 2019
Status: Active

Sea Level and Storm Hazards: Past and Present

Sea level and Storm Hazards: Past and Present is a multidisciplinary study of past changes in sea level. Prehistoric shorelines can be used as a baseline for current and future sea level changes under warmer-than-present climate. Emphasis is placed on looking at sea levels during warm periods of the last 500,000 years as well as how base level changes increase the risk of coastal inundation...

Herring Run (unchannelized side), Baltimore, MD
Date Published: February 25, 2019
Status: Active

Urban Waters Federal Partnership—Patapsco Watershed (Baltimore, Md. region)

Several watersheds in the Baltimore region have elevated PCB loads in tidal waters. Local jurisdictions are responsible for reducing PCB loading from their watersheds. The USGS is embarking on a pilot study in the Patapsco watershed that will help determine sources of PCBs and will demonstrate innovative monitoring and analysis techniques for more efficient use of mitigation resouces.

Neonicotinoid pesticides act as agonists of nicotinic acetylcholine receptors
Date Published: February 21, 2019
Status: Active

Genomic and Behavioral Effects of the Neonicotinoid Imidacloprid in Birds Exposed Through Pesticide-Coated Seeds

The Challenge: Neonicotinoid pesticides act as agonists of nicotinic acetylcholine receptors (nAChRs) and are designed to be lethal to insects while theoretically posing little to no threat to vertebrates. The perceived safety of neonicotinoids has led to a sharp increase in their use in the United States and globally, since they were first introduced in 1994. The use of the neonicotinoid...

Eastern Basins of US Oil and Gas Assessments
Date Published: December 19, 2018
Status: Active

Eastern Basins Oil and Gas Assessments

The USGS has conducted several assessments of undiscovered oil and gas in formations in the Blue Ridge Thrust Belt (5068), Piedmont Province (5069), Atlantic Coastal Plain Province (5070), and the New England Province (5072).  These basins are generally east of the Appalachian Basin...

Fossil-rich sediment profile with hammer.
Date Published: November 12, 2018
Status: Active

Geological Investigations of the Neogene

More than a third of the United States population lives in counties directly on the shoreline, making them vulnerable to hazards associated with changing sea level and storm surges associated with hurricanes and severe storms. The geologic record contains many examples of past intervals of warm climate and high sea level. "Geological Investigation of the Neogene" is examining proxy records of...

Chesapeake Bay watershed
Date Published: October 25, 2018
Status: Active

Quantifying and explaining patterns in nutrient and sediment export from urban streams within the Chesapeake Bay watershed- Rosemary Fanelli

Urban landscapes in the Chesapeake Bay (CB) watershed are growing at a rapid pace. A key component for the Chesapeake Bay restoration effort is identifying factors that control pollutant export from urban streams. Join our diverse team of water quality experts to explore emerging approaches to quantifying and explaining patterns in pollutant export in urban streams.

Assessing the role of automated telemetry data
Date Published: October 23, 2018
Status: Active

Assessing the role of automated telemetry data and mark-recapture approaches to improve estimates of bird population trends at migration banding stations- Bruce Peterjohn

Assessing the role of automated telemetry data and mark-recapture approaches to improve estimates of bird population trends at migration banding stations.

Response of a tidal brackish marsh to global change drivers
Date Published: October 16, 2018
Status: Active

Response of a tidal brackish marsh to global change drivers: an ecosystem level manipulation of warming and elevated carbon dioxide- Glenn Guntenspergen

The USGS and the Smithsonian Institution have initiated the first in situ active aboveground and belowground warming experiment in a coastal wetland that is focused on wetland temperature responses and also examines the interaction between warming, elevated CO2, and inundation frequency on wetland resilience in the face of changes in global change drivers.

Location of study watersheds in Clarksburg, Maryland.
Date Published: October 3, 2018
Status: Active

Understanding the Effects of Stormwater Management Practices on Water Quality and Flow

Urban development can have detrimental impacts on streams including altering hydrology, increasing nutrient, sediment, and pollutant loadings, and degrading biological integrity. Stormwater Best Management Practices (BMPs) can be used to mitigate the effects of urban development by retaining large volumes of stormwater runoff and treating runoff to remove pollutants. This project focuses on...

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NWIS Mapper screenshot
March 5, 2019

The NWIS mapper provides access to over 1.5 million sites contained in the USGS National Water Information System (NWIS), including sites where current and historical surface-water, groundwater, springs, and atmospheric data has been collected. Users can search by site type, data type, site number, or place.

USGS
January 1, 2019

Results of lipid biomarker concentration and compound specific isotopes analyzed from authigenic carbonates and surrounding sediment collected from Baltimore and Norfolk seep fields along the United States Atlantic Margin are presented in csv format. Samples were collected by the U.S. Geological Survey and Duke University between 2012 and 2015 using remotely operated vehicles (ROVs). Geochemical

Interactive map and chart highlighting USGS Domestic Continuous (Unconventional) Oil & Gas Assessments, 2000-Present
August 28, 2018

Interactively explore assessment summary information for continuous (unconventional) assessments conducted at the USGS from 2000-2018. The assessment results data used to generate this visualization can be downloaded here in Excel Format.  These data represent all assessment results for Continuous Assessments only from 2000-2018.

Map of Submerged Lands
April 4, 2018

The USGS Coastal and Marine Geology Program (CMGP) Internet Map Server is an interactive mapping service which allows the user to explore and download GIS data sets published by CMGP.

summary of key findings for scenario-based assessment for hurricanes
February 14, 2018

Key Findings for Scenario-Based Assessment for Hurricanes

Percentage of sandy beaches very likely (probability > 0.9) to experience erosion associated with collision, overwash, and inundation during category 1-5 hurricane landfall.

Oblique Aerial Photography Viewer
January 19, 2018

Obique photos offer a unique perspective of the coast. Features such as beach erosion or accretion, dune erosion and overwash can all be clearly characterized in this imagery. It also documents coastal infrastructure, as well as the damage that infrastructure may incur as the result of an impacting hurricane. 

Pharmaceuticals in water, fish, and ospreys nesting in Delaware River and Bay
October 19, 2017

Exposure of wildlife to Active Pharmaceutical Ingredients (APIs) is likely to occur but evidence of hazard and risk is limited. One exposure pathway that has received attention is trophic transfer of APIs in a water-fish-osprey food chain. 

Application screenshot thumbnail
September 1, 2017

The National Water Information System (NWIS) web application provides access to real-time and historical surface-water, groundwater, water-quality, and water-use data collected at approximately 1.5 million sites across all 50 states.

Coastal Change Hazards Portal Interactive Mapper screen grab
August 24, 2017

Interactive access to coastal change science and data for our Nation’s coasts. Information and products are organized within three coastal change hazard themes: 1) extreme storms, 2) shoreline change, and 3) sea-level rise. Displays probabilities of coastal erosion.

Long-tailed duck swimming
August 7, 2017

Data represents analyses of gizzard and gullet (esophagus and proventriculus) of nine ducks using traditional techniques

American Black Duck (Anas rubripes)
July 6, 2017

This data set is comprised of five files related to the modification and scoring of Index of Waterbird Community Integrity (IWCI) scores for all waterbirds of the Chesapeake Bay. One Excel file (A) contains a list of 100+ Chesapeake waterbird species and their species attribute and IWCI scores.

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Application to explore US Oil and Gas Assessments
March 19, 2019

This map shows the provinces assessed by the USGS for undiscovered oil and gas resources. 

Clarksburg, Maryland Story Map
October 4, 2018

Story Map: Land cover change in Clarksburg, Maryland between 2004 (left) and 2012 (right)

Groundwater Wells on Assateague Island
July 14, 2016

Well locations at Assateague Island National Seashore, Worcester County, MD.

Digital Elevation Model in the Atchafalaya Basin, LA
April 19, 2016

The 3DEP products and services available through The National Map consist of standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

USGS Storm-Tide Mapper and Data Services
March 8, 2016

The USGS Storm Tide Mapper is a tool for viewing, analyzing, and accessing storm tide data collected during and after hurricanes and Nor’easters. The USGS Storm Tide Mapper will continue to provide a unified and consistent source of real-time and archived storm-tide data.

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Year Published: 2016

High-resolution geophysical data collected along the Delmarva Peninsula, 2014, USGS Field Activity 2014-002-FA

The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy. A U.S. Geological Survey cruise was conducted in the summer of 2014 to map the inner continental shelf of the Delmarva Peninsula using geophysical and sampling techniques to define the geologic framework...

Pendleton, Elizabeth; Ackerman, Seth D.; Baldwin, Wayne E.; Danforth, William W.; Foster, David S.; Thieler, E. Robert; Brothers, Laura L.
Pendleton, E.A., Ackerman, S.D., Baldwin, W.E., Danforth, W.W., Foster, D.S., Thieler, E.R., and Brothers, L.L. 2015, High-resolution geophysical data collected along the Delmarva Peninsula, 2014, USGS Field Activity 2014-002-FA (ver. 2.0, March 2015): U.S. Geological Survey data release. http://dx.doi.org/10.5066/F7MW2F60

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Year Published: 2016

Historical files from Federal Government mineral exploration-assistance programs, 1950 to 1974

The Defense Minerals Administration (DMA), Defense Minerals Exploration Administration (DMEA), and Office of Minerals Exploration (OME) mineral exploration programs were active over the period 1950–1974. Under these programs, the Federal Government contributed financial assistance in the exploration for certain strategic and critical minerals. The...

Frank, David G.
Frank, D.G., 2016, Historical files from Federal Government mineral exploration-assistance programs, 1950 to 1974: U.S. Geological Survey Data Series 1004, http://dx.doi.org/10.3133/ds1004.

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Year Published: 2016

Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA

Despite historical observations of potential microcystin-producing cyanobacteria (including Leptolyngbya,Phormidium, Pseudoanabaena, and Anabaena species) in 74% of headwater streams in Alabama, Georgia, South Carolina, and North Carolina (USA) from 1993 to 2011, fluvial cyanotoxin occurrence has not been systematically assessed in the...

Loftin, Keith A.; Clark, Jimmy M.; Journey, Celeste A.; Kolpin, Dana W.; Van Metre, Peter C.; Bradley, Paul M.
Loftin, K.A., J.M. Clark, C.A. Journey, D.W. Kolpin, P.C. Van Metre, and P.M. Bradley. Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern United States. Environmental Toxicology & Chemistry. http://dx.doi.org/10.1002/etc.3391

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Year Published: 2015

U.S. Geological Survey Chesapeake science strategy, 2015-2025—Informing ecosystem management of America’s largest estuary

Executive Summary The U.S. Geological Survey (USGS) has the critical role of providing scientific information to improve the understanding and management of the Chesapeake Bay ecosystem. The USGS works with Federal, State, and academic science partners to provide research and monitoring, and communicate results of these activities to enhance...

Phillips, Scott; Blomquist, Joel D.; Phillips, Scott; Blomquist, Joel D.; Bennett, Mark; Berlin, Alicia; Blazer, Vicki; Claggett, Peter; Faulkner, Stephen; Hyer, Kenneth; Ladino, Cassandra; Moyer, Douglas; Muir, Rachel; Noe, Gregory B.; Phillips, Patrick J.
Phillips, Scott, and Blomquist, Joel, eds., 2015, U.S. Geological Survey Chesapeake science strategy, 2015–2025—Informing ecosystem management of America’s largest estuary: U.S. Geological Survey Open-File Report 2015–1162, 43 p., http://dx.doi.org/10.3133/ofr20151162.

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Year Published: 2008

Algal and Invertebrate Community Composition along Agricultural Gradients: A Comparative Study from Two Regions of the Eastern United States

Benthic algal and invertebrate communities in two Coastal Plain regions of the Eastern United States?the Delmarva Peninsula (27 sites) and Georgia Upper Coastal Plain (29 sites)?were assessed to determine if aspects of agricultural land use and nutrient conditions (dissolved and whole-water nitrogen and phosphorus) could be linked to biological...

Calhoun, Daniel L.; Gregory, M. Brian; Weyers, Holly S.
Algal and Invertebrate Community Composition along Agricultural Gradients: A Comparative Study from Two Regions of the Eastern United States; 2008; SIR; 2008-5046; Calhoun, Daniel L.; Gregory, M. Brian; Weyers, Holly S.

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Year Published: 2008

Simulated fate and transport of metolachlor in the unsaturated zone, Maryland, USA

An unsaturated-zone transport model was used to examine the transport and fate of metolachlor applied to an agricultural site in Maryland, USA. The study site was instrumented to collect data on soil-water content, soil-water potential, ground water levels, major ions, pesticides, and nutrients from the unsaturated zone during 2002-2004. The data...

Bayless, E.R.; Capel, P.D.; Barbash, J.E.; Webb, R.M.T.; Hancock, T.L.C.; Lampe, D.C.
Simulated fate and transport of metolachlor in the unsaturated zone, Maryland, USA; 2008; Article; Journal; Journal of Environmental Quality; Bayless, E. R.; Capel, P. D.; Barbash, J. E.; Webb, R. M. T.; Hancock, T. L. C.; Lampe, D. C.

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Year Published: 2007

Development of Relations of Stream Stage to Channel Geometry and Discharge for Stream Segments Simulated with Hydrologic Simulation Program-Fortran (HSPF), Chesapeake Bay Watershed and Adjacent Parts of Virginia, Maryland, and Delaware

The U.S. Geological Survey (USGS), U.S. Environmental Protection Agency (USEPA), Chesapeake Bay Program (CBP), Interstate Commission for the Potomac River Basin (ICPRB), Maryland Department of the Environment (MDE), Virginia Department of Conservation and Recreation (VADCR), and University of Maryland (UMD) are collaborating to improve the...

Moyer, Douglas; Bennett, Mark
Development of Relations of Stream Stage to Channel Geometry and Discharge for Stream Segments Simulated with Hydrologic Simulation Program-Fortran (HSPF), Chesapeake Bay Watershed and Adjacent Parts of Virginia, Maryland, and Delaware; 2007; SIR; 2007-5135; Moyer, Douglas L.; Bennett, Mark R.

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Year Published: 1998

Freshwater use in Maryland, 1995

Wheeler, Judith C.
Freshwater use in Maryland, 1995; 1998; FS; 115-98; Wheeler, Judith C.

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Year Published: 1997

Water withdrawal and use in Maryland, 1992-93

During 1992, about 1,430 million gallons per day (Mgal/d) of freshwater was withdrawn from surface-water and ground-water sources in Maryland. Total freshwater withdrawals increased during 1993 to about 1,480 Mgal/d. Saline surface- water withdrawals for cooling condensers increased from about 5,350 Mgal/d during 1992 to 5,840 Mgal/d during...

Wheeler, J.C.
Water withdrawal and use in Maryland, 1992-93; 1997; WRI; 96-4314; Wheeler, J. C.

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Year Published: 1995

Water withdrawal and use in Maryland, 1990-91

During 1990, about 1,460 million gallons per day (Mgal/d) of freshwater was withdrawn from surface- water and ground-water sources in Maryland. Total freshwater withdrawals increased during 1991 to about 1,500 Mgal/d. Saline surface-water withdrawals for cooling condensors increased from about 4,550 Mgal/d during 1990 to 5,760 Mgal/d during 1991....

Wheeler, J.C.
Water withdrawal and use in Maryland, 1990-91; 1995; WRI; 93-4225; Wheeler, J. C.

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Year Published: 1992

Water withdrawal and use in Maryland, 1988-89

Wheeler, J.C.
Water withdrawal and use in Maryland, 1988-89; 1992; WRI; 91-4179; Wheeler, J. C.

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Year Published: 1991

Water withdrawal and use in Maryland, 1987

Wheeler, J.C.
Water withdrawal and use in Maryland, 1987; 1991; OFR; 90-572; Wheeler, J. C.

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USGS
November 14, 2017

Capture-recapture software to correct raw counts of wildlife fatalities using trial experiments for carcass detecition probability and persistence time.

Filter Total Items: 40
Image from an application that navigates users through USGS National Oil and Gas Assessment Provinces
November 14, 2018

National Oil and Gas Assessment Provinces

This is a graphic from the USGS National Oil and Gas Assessment Explorer application, which allows user to drill into 70 oil and gas assessment provinces throughout the United States.

USGS scientists collecting fossils from a Calvert Formation sample site
October 22, 2018

Geologists Sampling at Scientists Cliffs

Photo shows USGS geologists obtaining microfossil and biomarker samples from the Calvert Formation at Scientists Cliffs. 

October 5, 2018

Bandit Download

This screencast is a tutorial on how to find Bandit for download as well as finding Bandit resources via the BBL's webpages. 
 

Image shows USGS scientists in PFDs collecting a seismic airgun while at sea
September 6, 2018

Retrieving Seismic Airguns

USGS personnel on the deck of the R/V Hugh R. Sharp during retrieval of seismic airguns.  The streamer that receives the seismic signals generated by the airguns is towed behind the ship and is here shown

...
February 28, 2018

Bee Laboratory (Instagram Story)

Instagram story showing the USGS Bee Inventory and Monitoring Lab clearing invasive species from a field.

Satellite image showing the Delaware Bay and Chesapeake Bay region
January 25, 2017

Satellite Image of the Delaware Bay and Chesapeake Bay Region

This Indian Space Research Organization LISS-3 image of the Delaware Bay and Chesapeake Bay region, acquired on January 25, 2017, shows the landscape along the densely populated U.S. East coast. Ecosystems and sea-level rise are among the regional landscape changes that satellite imagery helps to monitor. 

August 26, 2016

First Days - Harlequin Ducks

This ridiculously cute video of baby Harlequin Ducks (Histrionicus histrionicus) shows their first day outside the egg (about 20 hours old). Scientists at Patuxent Wildlife Research Center are training ducks to respond to sounds — just like a hearing test given to kids during elementary school — to learn more about their ability to hear underwater. This will inform the

...
Image shows a detail of the texture of marble
July 20, 2016

Cockeysville Marble

Marble is a famous metamorphic rock known for its use in sculpture and architecture. This particular marble came from the Campbell Quarry in Texas, Maryland.

Attribution: Northeast
Image shows detail of dark crystals in marble
July 20, 2016

Diopside Crystals

Diopside crystals are made up of Magnesium, Calcium, Silicon and Oxygen, and are usually found in metamorphic rocks. These crystals have developed in some Cockeysville Marble from Texas, Maryland.

Attribution: Northeast
As US models predicted Hurricane Joaquin washed out a road at Kitty Hawk, NC in 2015.
June 1, 2016

Hurricane erodes N.C. road

As US models predicted Hurricane Joaquin washed out a road at Kitty Hawk, NC in 2015.

A long-tailed duck, two days old, standing. 
May 31, 2016

A long-tailed duck, 2 days old

A long-tailed duck, two days old, standing. 

Osprey Chicks on the James River
April 15, 2016

DDT nearly wiped out these birds, now they’re making a comeback

Washington Post article on the impacts of DDT on birds.

The "Best Report" for 2014 is "Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas, Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2009-12"

Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas
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Large stormwater retention pond compared to a green stormwater infrastructure dry pond with native vegetation.
November 18, 2019

A new study finds that a high density of green stormwater infrastructure can provide enhanced mitigation of peak flows and runoff volumes compared to large, detention-based stormwater control practices.

Image shows a map of the Eastern United States with the boundaries of the Marcellus Shale superimposed
October 3, 2019

The Marcellus Shale and Point Pleasant-Utica Shale formations of the Appalachian Basin contain an estimated mean of 214 trillion cubic feet of undiscovered, technically recoverable continuous resources of natural gas, according to new USGS assessments.

A USGS hydrologic technician attaches a storm tide sensor to a pier piling for Hurricane Dorian
September 5, 2019

Editor’s Note: This story was revised Sept. 10, 2019 to include the later phases of USGS’ response to Hurricane Dorian.

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Dorian, visit the USGS Hurricane Dorian page at www.usgs.gov/dorian.

Young Whooping Crane
March 13, 2019

This week marks a significant milestone in the conservation and recovery of the endangered whooping crane. On March 11 and 13, the U.S. Geological Survey’s Patuxent Wildlife Research Center transferred its last two cranes of the approximately 75 that were in its flock to other institutions, closing out more than 50 years of the center’s whooping crane research and captive breeding success.

dark space with golden solar flare
March 5, 2019

A new report and map published by the U.S. Geological Survey provides critical insight to electric power grid operators across the northeastern United States in the event of a once-per-century magnetic superstorm.  

Landsat landcover classification along the Maryland and Virginia coast
November 16, 2018

New study analyzed Landsat satellite imagery to document historical and recent (post-Hurricane Sandy) wetland changes that occurred along the Maryland and Virginia coastlines since 1984.

Two people, wearing safety gear, stand on board a ship and retrieve an instrument, attached to heavy cable, from the water..
November 1, 2018

In August 2018, the USGS Coastal/Marine Hazards and Resources Program (CMHRP) completed the Mid-Atlantic Resource Imaging Experiment (MATRIX), a three-week cruise that acquired more than 2,000 kilometers of multichannel seismic data between Hudson Canyon and Cape Hatteras on the U.S. Atlantic margin.

Photograph of a sonobuoy launch
September 20, 2018

Data acquired by the U.S. Geological Survey on the U.S. Atlantic Margin in August 2018 reveal new information about the distribution of gas hydrates in the sector stretching from the upper continental slope to deep water areas offshore New Jersey to North Carolina.

Two osprey nestlings in the Delaware Estuary
July 10, 2018

Lower levels of environmental contaminants—including pesticides, flame retardants and other pollutants—were recently found in osprey eggs in the Delaware Estuary compared to those tested from the 1970s through the early 2000s. 

A screenshot of the Coastal Change hazards portal showing erosion, overwash and inundation potentials along the east coast
September 26, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Maria, visit the USGS Hurricane Maria page at https://www.usgs.gov/maria.

Image shows a geologic map of the Lower 48
August 21, 2017

A carbonatite here, a glacial moraine there, a zig-zagging fault or two, even a behemoth of a batholith. The geology of the 50 States is an enormous patchwork of varied forms, beautiful in their variance but challenging to present as a single map.

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