Unified Interior Regions

Arkansas

World class scientists working in Southeast Region Science Centers help our partners understand and manage complex issues including competition for limited water resources, coastal hazards, mineral and energy resource extraction, degraded ecosystems, vector-borne diseases, rapidly changing land use, and response to climate change.

States L2 Landing Page Tabs

World class scientists working in Southeast Region Science Centers help our partners understand and manage complex issues including competition for limited water resources, coastal hazards, mineral and energy resource extraction, degraded ecosystems, vector-borne diseases, rapidly changing land use, and response to climate change.

News

Date published: February 25, 2021

Mapping Challenge Update (02/25/21): Fire Stations in AR

This challenge saw over 150 edits since last week - AWESOME! 

Date published: February 18, 2021

Mapping Challenge Update (02/18/21): Fire Stations in AR

Volunteers contributed over 100 edits to this challenge since it was launched last week - NICE WORK!! 

Date published: February 16, 2021

USGS Updates Mineral Database with Niobium Deposits in the United States 

The U.S. Geological Survey (USGS) has updated its USMIN Mineral Deposit Database (USMIN) for the mineral commodity niobium, one of 35 mineral commodities declared critical by the U.S. Department of the Interior. Sites in this dataset occur in Alaska, Arkansas, Colorado, Nebraska and Texas.

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Date published: June 4, 2020
Status: Active

Geophysical Mapping of Geologic Systems Host to Critical Mineral Deposits, Southern Midcontinent, US

The objective of this project is to use high-resolution state-of-the-art airborne and regional ground geophysical methods to map an underexplored region of the southern Midcontinent that is important to economic and critical mineral deposits.

Date published: October 21, 2019
Status: Active

Ozark Dome-Arkoma Basin-Ouachita Transect

The Ozark Dome-Arkoma Basin-Ouachita Transect (ODABOuT) project examines the three-dimensional geology of a transect of the southern orogenic margin of North America in its best surface exposure in western Arkansas. The Ozark Dome and Arkoma Basin represent a foreland uplift and foreland basin that formed as a result of the impinging Ouachita orogenic belt. Understanding the geometry and...

Date published: August 15, 2019
Status: Active

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Date published: February 26, 2019
Status: Completed

2017 Midwest Spring Floods

Learn more about USGS flood activities related to the 2017 Midwest Spring Floods that occurred across large portions of Missouri, Illinois, Indiana, Ohio, Oklahoma, and Arkansas in late April and early May, 2017.

Date published: February 26, 2019
Status: Completed

2016 Southern Spring Floods

Learn more about USGS flood activities related to the 2016 Southern Spring Floods. These floods were caused by significant amounts of tropical moisture that was funneled through a narrow zone across East Texas, Louisiana, Arkansas, and Mississippi, creating severe flood conditions.

Date published: February 25, 2019
Status: Completed

May-June 2013 Midwest Floods

Learn more about USGS flood activities related to the May-June 2013 Midwest Floods.

Date published: February 25, 2019
Status: Completed

Spring/Summer 2011 Mississippi River Basin Floods

Learn more about USGS flood activities related to the Spring/Summer 2011 floods throughout the Mississippi River Basin.

Date published: February 25, 2019
Status: Completed

April 2011 Arkansas Flood

Learn more about USGS flood activities related to the April 2011 Arkansas Flood.

Date published: December 7, 2018
Status: Active

Arkoma Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Arkoma Basin Province 5062.

     

    Date published: December 7, 2018
    Status: Active

    Ozark Uplift Oil and Gas Assessments

    The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Ozark Uplift Province (5057).

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    Date published: September 29, 2020

    Airborne magnetic and radiometric survey over northwest Arkansas, 2019-2020

    This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over an area of northwest Arkansas. The airborne geophysical survey was jointly funded by the USGS National Cooperative Geologic Mapping Program and the Earth Mapping Resource Initiative and was designed to meet the complimentary needs related to geologic mapping and mineral resource...

    Date published: June 23, 2020

    Global Geochemical Database for Critical Minerals in Archived Mine Samples

    The Critical Minerals in Archived Mine Samples Database (CMDB) contains chemistry and geologic information for historic ore and ore-related rock samples from mineral deposits in the United States. In addition, the database contains samples from archetypal deposits from 27 other countries in North America, South America, Asia, Africa and Europe. Samples were obtained from archived ore

    Date published: April 23, 2020

    Domestic Wells in the United States

    Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater. 

    Date published: January 15, 2020

    Audiomagnetotelluric data, Buffalo River watershed, Arkansas, 2017

    This dataset includes the locations for audio-magnetotelluric (AMT) sounding data collected in August 2017 in the Buffalo River watershed of northern Arkansas by the U.S. Geological Survey (USGS). The sites were mostly alongside Osage Creek and its intermittent tributaries. Along with geologic mapping, the USGS used AMT data at 6 sites along a southwest-northeast profile of about 7 kilo

    Date published: December 26, 2019

    Geochemical analyses of bauxite and associated rocks from the Arkansas bauxite region, central Arkansas

    This data release compiles major and trace element analytical results of samples of bauxite (aluminum ore) and associated rocks collected from the Arkansas bauxite region, located near the center of Arkansas in Pulaski and Saline Counties. Samples were collected by the U.S. Geological Survey (USGS) in April 2018 as part of the USGS' focus on increased understanding of the United State

    Date published: September 26, 2019

    Channel bed elevations for a 5-mile reach on the Maumelle River upstream of Lake Maumelle near Little Rock, Arkansas, 2019

    The U.S. Geological Survey (USGS) in cooperation with the U.S. Army Corps of Engineers (USACE) did a bathymetric survey of the lower reach of the Maumelle River upstream of Lake Maumelle, near Little Rock, Arkansas, from July 9—11, 2019. Channel bed elevations (thalweg) were collected to support a USACE modeling effort on a 5-mile reach of the Maumelle River. In parts

    Date published: July 12, 2019

    Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models

    Regional grid files and 3D voxel models were used to study crustal architecture beneath the Southern Midcontinent (USA) by McCafferty and others (2019). The study covered a rectangular, multi-state area of 924 by 924 kilometers centered on Missouri, and a corresponding volume extending from the topographic surface to a depth of 50 kilometers below sea level. The grid files consist of

    Date published: July 1, 2019

    Ground-based time-domain electromagnetic data and resistivity models for the Mississippi Alluvial Plain Project

    The Mississippi Alluvial Plain (MAP) Project contains several geologic units which act as important aquifers. We collected several sets of time-domain electromagnetic (TEM) data consisting of two higher-density surveys and six regional-scale transects. The higher density surveys were collected to compare and contrast to other geophysical data not included in this data release, such as a

    Date published: December 6, 2018

    Downloadable Data for Ozark Uplift Oil and Gas Assessments

    GIS Data for Ozark Uplift Oil and Gas Assessments

    Date published: August 28, 2018

    USGS Domestic Continuous (Unconventional) Oil & Gas Assessments, 2000-Present

    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...

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    Black and grey map of the contiguous 48 states shaded by the number of people using domestic wells per square kilometer (2010)
    April 23, 2020

    Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater. 

    Buffalo River Map Screen Capture
    September 14, 2016

    Real-time displays of current floating conditions at various sites along the Arkansas Buffalo River. 

    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.

    Arkansas Map Thumbnail
    January 1, 2014

    The Arkansas Groundwater - Quality Network is a web map interface that provides rapid access to the U.S. Geological Survey's (USGS) NWIS and the U.S. Environmental Protection Agency's (EPA) STORET databases of ambient groundwater information. The interface enables users to perform simple graphical analysis and download selected water-quality data. 

    Sparta Aquifer Monitoring and Sampling Map - AR/LA
    November 10, 2003

    The Union County Water Conservation Board with funding from the U.S. Environmental Protection Agency began a study in 2003 with the U.S. Geological Survey, the Union County Conservation District, Burns & McDonnell to monitor the impact of water-level recovery and water-quality characteristics of the Sparta aquifer system in southern Arkansas and northern Louisiana.

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    Year Published: 2018

    Flooding in the southern Midwestern United States, April–May 2017

    Excessive rainfall resulted in flooding on numerous rivers throughout the southern Midwestern United States (southern Midwest) in late April and early May of 2017. The heaviest rainfall, between April 28 and 30, resulted in extensive flooding from eastern Oklahoma to southern Indiana including parts of Missouri, Arkansas, and Illinois.Peak-of-...

    Heimann, David C.; Holmes, Robert R.; Harris, Thomas E.
    Heimann, D.C., Holmes, R.R., Jr., and Harris, T.E., 2018, Flooding in the southern Midwestern United States, April–May 2017: U.S. Geological Survey Open-File Report 2018–1004, 36 p., https://doi.org/10.3133/ofr20181004.

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    Year Published: 2016

    St. Louis area earthquake hazards mapping project; seismic and liquefaction hazard maps

    We present probabilistic and deterministic seismic and liquefaction hazard maps for the densely populated St. Louis metropolitan area that account for the expected effects of surficial geology on earthquake ground shaking. Hazard calculations were based on a map grid of 0.005°, or about every 500 m, and are thus higher in resolution than any...

    Cramer, Chris H.; Bauer, Robert A.; Chung, Jae-won; Rogers, David; Pierce, Larry; Voigt, Vicki; Mitchell, Brad; Gaunt, David; Williams, Robert; Hoffman, David; Hempen, Gregory L.; Steckel, Phyllis; Boyd, Oliver S.; Watkins, Connor M.; Tucker, Kathleen; McCallister, Natasha
    Cramer C.H., Bauer R.A., Chung J.-W., Rogers J.D., Pierce L., Voigt V., Mitchell B., Gaunt D., Williams R.A., Hoffman D., Hempen G.L., Steckel P.J., Boyd O.S., Watkins C.M., Tucker K., McCallister N.S. St. Louis area earthquake hazards mapping project; seismic and liquefaction hazard maps Seismological Research Letters, January, 2017, Vol. 88, Issue 1, pp. 206-223

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    Year Published: 2016

    Preliminary assessment of a previously unknown fault zone beneath the Daytona Beach sand blow cluster near Marianna, Arkansas

    We collected new high‐resolution P‐wave seismic‐reflection data to explore for possible faults beneath a roughly linear cluster of early to mid‐Holocene earthquake‐induced sand blows to the south of Marianna, Arkansas. The Daytona Beach sand blow deposits are located in east‐central Arkansas about 75 km southwest of Memphis, Tennessee, and...

    Odum, Jackson K.; Williams, Robert; Stephenson, William J.; Tuttle, Martitia P.; Al-Shukri, Hadar

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    Year Published: 2016

    Dense lower crust elevates long-term earthquake rates in the New Madrid seismic zone

    Knowledge of the local state of stress is critical in appraising intraplate seismic hazard. Inverting earthquake moment tensors, we demonstrate that principal stress directions in the New Madrid seismic zone (NMSZ) differ significantly from those in the surrounding region. Faults in the NMSZ that are incompatible with slip in the regional stress...

    Levandowski, William Brower; Boyd, Oliver S.; Ramirez-Guzman, Leonardo
    Levandowski, W., O. S. Boyd, and L. Ramirez-Guzmán (2016), Dense lower crust elevates long-term earthquake rates in the New Madrid seismic zone, Geophys. Res. Lett., 43, doi:10.1002/2016GL070175.

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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

    Hydrologic effects on diameter growth phenology for Celtis laevigata and Quercus lyrata in the floodplain of the lower White River, Arkansas

    Bottomland hardwood (BLH) forests represent an extensive wetland system in the Mississippi Alluvial Valley and southeastern USA, and it is currently undergoing widespread transition in species composition. One such transition involves increased establishment of sugarberry (Celtis laevigata), and decreased establishment of overcup oak (Quercus...

    Schweitzer, Callie Jo; Clatterbuck, Wayne K.; Oswalt, Christopher M.; Allen, Scott T.; Cochran, Wesley; Krauss, Ken W.; Keim, Richard F.; King, Sammy L.
    Allen, S.T., Cochran, J.W., Krauss, K.W., Keim, R.F., and King, S.L., 2016, Hydrologic effects on diameter growth phenology for Celtis laevigata and Quercus lyrata in the floodplain of the lower White River, Arkansas: in Schweitzer, C.J., Clatterbuck, W.K., and Oswalt, C.M., eds., Proceedings of the 18th Biennial Southern Silvicultural Research Conference, USDA Forest Service General Technical Report SRS-212, p. 273-279: Asheville, N.C.

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    Year Published: 2015

    Ground motion-simulations of 1811-1812 New Madrid earthquakes, central United States

    We performed a suite of numerical simulations based on the 1811–1812 New Madrid seismic zone (NMSZ) earthquakes, which demonstrate the importance of 3D geologic structure and rupture directivity on the ground‐motion response throughout a broad region of the central United States (CUS) for these events. Our simulation set consists of 20...

    Ramirez-Guzman, L.; Graves, Robert; Olsen, Kim B.; Boyd, Oliver S.; Cramer, Chris H.; Hartzell, Stephen H.; Ni, Sidao; Somerville, Paul G.; Williams, Robert; Zhong, Jinquan

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    Year Published: 2015

    Crustal deformation in the New Madrid seismic zone and the role of postseismic processes

    Global Navigation Satellite System data across the New Madrid seismic zone (NMSZ) in the central United States over the period from 2000 through 2014 are analyzed and modeled with several deformation mechanisms including the following: (1) creep on subsurface dislocations, (2) postseismic frictional afterslip and viscoelastic relaxation from the...

    Boyd, Oliver S.; Robert Smalley, Jr; Zeng, Yuehua
    Boyd, O. S., R. Smalley Jr., and Y. Zeng (2015), Crustal deformation in the New Madrid seismic zone and the role of postseismic processes, J. Geophys. Res. Solid Earth, 120, doi:10.1002/2015JB012049.

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    Year Published: 2015

    Estimated water use in Arkansas, 2010

    The Arkansas Natural Resources Commission (ANRC) conducts an annual inventory of reported groundwater and surface-water withdrawals in Arkansas in cooperation with the U.S. Geological Survey (USGS). This report describes withdrawals from groundwater and surface-water resources in Arkansas for 2010. The report compiles withdrawals by county for 10...

    Pugh, Aaron L.; Holland, Terrance W.
    Pugh, A.L., and Holland, T.W., 2015, Estimated water use in Arkansas, 2010: U.S. Geological Survey Scientific Investigations Report 2015–5062, 33 p., http://dx.doi.org/10.3133/sir20155062. ISSN 2328-0328 (online)

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    Year Published: 2014

    Why the New Madrid earthquakes are M 7–8 and the Charleston earthquake is ∼M 7

    Estimates of magnitudes of large historical earthquakes are an essential input to and can seriously affect seismic‐hazard estimates. The earthquake‐intensity observations, modified Mercalli intensities (MMI), and assigned magnitudes Mof the 1811–1812 New Madrid events have been reinterpreted several times in the last decade and have...

    Cramer, Chris H.; Boyd, Oliver S.
    Cramer, C. H., and O. S. Boyd (2014), Why the New Madrid Earthquakes are M7–8 and the Charleston Earthquake is ~M7, Bull. Seis. Soc. Am., 104, 2884–2903, doi:10.1785/0120120257.

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    Year Published: 2013

    Workshop on New Madrid geodesy and the challenges of understanding intraplate earthquakes

    On March 4, 2011, 26 researchers gathered in Norwood, Massachusetts, for a workshop sponsored by the U.S. Geological Survey and FM Global to discuss geodesy in and around the New Madrid seismic zone (NMSZ) and its relation to earthquake hazard. The group addressed the challenge of reconciling current geodetic measurements, which show low present-...

    Boyd, Oliver; Calais, Eric; Langbein, John; Magistrale, Harold; Stein, Seth; Zoback, Mark
    Workshop on New Madrid geodesy and the challenges of understanding intraplate earthquakes; 2013; OFR; 2013-1004; Boyd, Oliver ; Calais, Eric ; Langbein, John ; Magistrale, Harold ; Stein, Seth ; Zoback, Mark

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    Year Published: 2012

    Magnitude Estimates of M7.3-7.8 for the 1811-1812 New Madrid and M7.0 for the 1886 Charleston Earthquakes from a Monte Carlo Analysis of Mean MMIs

    No abstract available

    Cramer, Chris H.; Boyd, Oliver S.
    Magnitude Estimates of M7.3-7.8 for the 1811-1812 New Madrid and M7.0 for the 1886 Charleston Earthquakes from a Monte Carlo Analysis of Mean MMIs; 2012; Conference publication; Conference publication; Eastern Section‐SSA 2012 Meeting Report; Cramer, Chris H.; Boyd, Oliver S.

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    Water Use Site Retrieval Page Icon
    July 4, 2016

    In 1977, the Congress of the United States recognized the need for uniform, current, and reliable information on water use and directed the U.S. Geological Survey (USGS) to establish a National Water-Use Information Program (NWUIP) to complement the Survey's data on the availability and quality of the Nations water resources.

    Image: Public Wells
    August 14, 1996

    Water Well Constrution Reports entered online. 

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    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.

    September 20, 2018

    Habitat Connectivity: Assessing Threats and IDing Conservation Actions

    An important conservation strategy for climate change is to enhance and maintain regional habitat connectivity for the long-term viability of wildlife populations. Modeling habitat connectivity for wildlife species often results in a mapped network of linkages between habitat patches. A critical next step is to determine which of those linkages are priorities for

    Real-time flow meter on an Arkansas irrigation well
    May 16, 2018

    Real-time flow meter on an Arkansas irrigation well

    Real-time flow meter installed on a center-pivot irrigation well in Mississippi County, Arkansas as part of a cooperative project conducted between USGS and the Arkansas Natural Resources Commission. The meter will measure water use for irrigation, providing data which will help improve water-use information in other locations as well.

    December 31, 2017

    Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010

    Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010” is a short video showing modeled groundwater withdrawal rates from the Ozark Plateaus aquifer system (Ozark system) in the central United States. The Ozark Plateaus Groundwater Availability Study aims to quantify current groundwater resources in the Ozark system, evaluate how these resources have changed

    August 7, 2017

    Developing Effective Drought Monitoring Tools for Farmers and Ranchers

    This webinar was conducted on August 7, 2017 as part of the USGS National Climate Change and Wildlife Science Center’s Climate Change Science and Management Webinar Series, held in partnership with the USFWS National Conservation Training Center. 

    Webinar Summary: The South Central U.S. is one of the main agricultural regions in North America: annual agricultural

    Image shows sand in a hand
    December 31, 2015

    Frac Sands in Hand

    Frac sands used in unconventional oil and gas development.

    April 6, 2015

    Groundwater, A Source To Streams in the Ozark Plateaus

    Groundwater or surface water interaction in the Ozark Plateaus aquifer system. Includes examples of thermal imagery used to see groundwater entering streams.

    Arkansas River at Dardanelle, Arkansas, during low-flow conditions on September 29, 2012
    September 29, 2012

    low-flow conditions on Arkansas River at Dardanelle, Arkansas

    Arkansas River at Dardanelle, Arkansas, during low-flow conditions on September 29, 2012. Photograph by Daniel M. Wagner, U.S. Geological Survey.

    Flood of May 3, 2011, at USGS streamflow-gaging station 07069000, Black River at Pocahontas, Arkansas.
    May 3, 2011

    Flood of May 3, 2011, Black River at Pocahontas, Ark.

    Flood of May 3, 2011, at USGS streamflow-gaging station 07069000, Black River at Pocahontas, Arkansas. Photograph by D.M. Wagner, Lower Mississippi-Gulf Water Science Center.

    SIR 2016–5081

    USGS streamflow-gaging station 07069000, Black River at Pocahontas, Arkansas
    May 3, 2011

    Flood at USGS station 07069000, Black River at Pocahontas, Ark.

    Flood of May 3, 2011, at USGS streamflow-gaging station 07069000, Black River at Pocahontas, Arkansas. Photograph by D.M. Wagner, Lower Mississippi-Gulf Water Science Center.

    07048490, Town Branch tributary at Highway 16 at Fayetteville, Arkansas
    April 25, 2011

    Flood at 07048490, Town Branch trib. at Highway 16 Fayetteville, Ark.

    Flood of April 25, 2011, at U.S. Geological Survey (USGS) streamflow-gaging station 07048490, Town Branch tributary at Highway 16 at Fayetteville, Arkansas. Photograph by D.M. Wagner, Lower Mississippi-Gulf Water Science Center.

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    TNMCorps Mapping Challenge: FireStations in AR
    February 25, 2021

    This challenge saw over 150 edits since last week - AWESOME! 

    TNMCorps Mapping Challenge: FireStations in AR
    February 18, 2021

    Volunteers contributed over 100 edits to this challenge since it was launched last week - NICE WORK!! 

    Image shows a satellite view of the United States, with parts of Mexico and Canada visible.
    February 16, 2021

    The U.S. Geological Survey (USGS) has updated its USMIN Mineral Deposit Database (USMIN) for the mineral commodity niobium, one of 35 mineral commodities declared critical by the U.S. Department of the Interior. Sites in this dataset occur in Alaska, Arkansas, Colorado, Nebraska and Texas.

    TNMCorps Mapping Challenge: FireStations in AR NEW
    February 11, 2021

    TNMCorps mapping challenges shift back to the east with a challenge for fire stations in Arkansas! This is an excellent challenge for Standard Editors with many unedited (i.e., red) points that need to be confirmed.

    Dragonfly larvae being held in an open hand
    July 21, 2020

    A team of federal, academic, and NGO researchers conducted a national-scale assessment of mercury bioaccumulation in aquatic ecosystems using dragonfly larvae as biosentinels.

    THUMBNAIL: Timelapse of Schools in AR
    April 7, 2020

    This challenge is now complete!!  Thank you to everyone who contributed!

    TNMCorps Mapping Challenge: Schools in AR
    April 2, 2020

    This challenge is now finished!  Thank you to everyone who participated!

    TNMCorps Mapping Challenge: City/Town Halls in AR
    April 2, 2020

    This challenge is now complete!  Thank you to everyone who participated!

    TNMCorps Mapping Challenge: Schools in AR
    March 23, 2020

    This challenge is close to being finished with only 14 unedited points remaining and 3 points awaiting review!

    TNMCorps Mapping Challenge: City/Town Halls in AR
    March 23, 2020

    This challenge is close to being finished! However, there are still some points that have yet to be added. 

    TNMCorps Mapping Challenge: City/Town Halls in AR
    March 12, 2020

    This challenge is coming along nicely with over 20 points added since last week!

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