Unified Interior Regions

Colorado

The Rocky Mountain Region ranges from the Colorado Rockies to the Western Deserts to the Great Plains. The Rocky Mountain Region conducts multi- and interdisciplinary research and monitoring in locations across the Region, the United States, around the world, and across our solar system.

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Filter Total Items: 209
Date published: February 19, 2019
Status: Active

Topographic Survey Data of Fountain Creek between Colorado Springs and the Confluence of Fountain Creek at the Arkansas River

Starting in 2012, the U.S. Geological Survey (USGS) in cooperation with Colorado Springs Utilities selected 10 reaches or study areas along Fountain Creek between Colorado Springs and the confluence of Fountain Creek at the Arkansas River for annual bed and bank characterization and topographic surveys.  

The selected 10 study areas are approximately 5 to 20 bank-full channel widths in...

Contacts: Laura Hempel
Date published: December 13, 2018
Status: Active

Connections between Forested and Urban Landscapes and Implications for Water Supply

Interactions between forested and urban landscapes can lead to reciprocal effects that have substantial impacts on water supply and ecology. Air pollution from urban and forested landscapes can be deposited on adjacent forests, while forest disturbance, such as wildfires and floods, can remobilize those contaminants. Additionally, pollutants from legacy land use (e.g., mining) can also be...

Date published: December 11, 2018
Status: Active

National Unmanned Aircraft Systems Project Office

The U.S. Geological Survey (USGS) National Unmanned* Aircraft Systems (UAS) Project Office (NUPO) leads the research activities needed to make UAS data collection an efficient, safe, and cost-effective remote sensing tool for Department of the Interior (DOI) and USGS scientists.

DOI manages over 20 percent of the Nation’s public lands and is responsible for migratory bird and wildlife...

Date published: December 7, 2018
Status: Completed

Oil Shale

The USGS Energy Resources Program has studied oil shale resources of the United States, with a significant effort on the Eocene Green River Formation of Colorado, Utah, and Wyoming.  This formation contains the largest oil shale deposits in the world. Oil shale, despite the name, does not actually contain oil, but is a precursor of oil that is converted to crude oil when heated.  

Date published: December 6, 2018
Status: Active

Park Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Park Basins Province 5038 of Colorado.

     

    Date published: December 6, 2018
    Status: Active

    Las Animas Arch Oil and Gas Assessments

    The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Las Animas Arch Province 5040 of southeastern Colorado.

    Date published: December 6, 2018
    Status: Active

    Albuquerque-Santa Fe Rift Oil and Gas Assessments

    The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Albuquerque-Santa Fe Rift 5023.

    Date published: November 30, 2018
    Status: Active

    Anadarko Basin Oil and Gas Assessments

    The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Anadarko Basin Province 5058.

       

      Date published: November 29, 2018
      Status: Active

      Hydrothermal alteration at Yellowstone - linking geophysical models to alteration mineralogy- Paul Bedrosian

      This opportunity focuses on integration of geophysical modeling with constraints on alteration mineralogy from spectral measurements on drill core and hyperspectral remote sensing data.

      Date published: November 29, 2018
      Status: Active

      Raton Basin-Sierra Grande Uplift Oil and Gas Assessments

      The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Raton Basin–Sierra Grande Uplift Province 5041 of northeastern New Mexico and southeastern Colorado.

      Date published: November 29, 2018
      Status: Active

      Denver Basin Oil and Gas Assessments

      The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Denver Basin Province 5039 in Colorado, Kansas, Nebraska, South Dakota, and Wyoming.

      Date published: November 27, 2018
      Status: Active

      Regional-to-national scale electrical resistivity model development- Paul A Bedrosian

      The advent of national geophysical initiatives (e.g. EarthScope, AusLamp, SinoProbe) has started the race to develop regional- and national-scale geophysical models. In parallel, the need for such models is on the rise within the natural-hazard and resource sectors. This internship focuses on development of three-dimensional electrical resistivity models derived from magnetotelluric (MT) data...

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      Date published: August 27, 2020

      Concentration of inorganic chemical elements associated with suspended sediment at Muddy Creek below Paonia Reservoir, Gunnison County, Colorado, U.S. Geological Survey site number 385626107212000

      Dataset includes the analysis results of 49 inorganic chemical elements bound to suspended-sediment particles below Paonia Reservoir during a sediment release in September 2017. Suspended-sediment samples were collected at U.S. Geological Survey (USGS) station number 385626107212000 by following data collection procedures and protocols in Edwards and Glysson (1999). The samples were freez

      Date published: August 14, 2020

      Phytoplankton data for Stagecoach Reservoir near Steamboat Springs, Colorado, July 2017 through September 2018

      This U.S. Geological Survey (USGS) data release provides phytoplankton data collected from Stagecoach Reservoir, Colorado, during the summer months, July through September, of 2017 and 2018. The data were collected by the USGS, in cooperation with the Upper Yampa Water Conservancy District and Colorado Parks and Wildlife. All data are reported as raw calculated values and are not r

      Date published: July 30, 2020

      Stationary Hydrophone Data on the Upper Colorado River, Colorado, April 23 to August 29, 2019

      In 2019, the U.S. Geological Survey (USGS), in cooperation with the Upper Colorado River Wild and Scenic Stakeholder Group, studied the magnitude and recurrence interval of streamflow needed to initiate bed movement of gravel-sized and finer sediment in a segment of the Colorado River in Colorado to better understand sediment movement and its relation to flow regimes of the river. Bed

      Date published: July 30, 2020

      Acoustic, Spatial, and Sediment Size Data Collected on the Upper Colorado River to Estimate the Flushing Flows, Colorado, 2019

      In 2019, the U.S. Geological Survey (USGS), in cooperation with the Upper Colorado River Wild and Scenic Stakeholder Group, studied the magnitude and recurrence interval of streamflow needed to initiate bed movement of gravel-sized and finer sediment in a segment of the Colorado River in Colorado to better understand sediment movement and its relation to flow regimes of the river. Bed m

      Date published: July 30, 2020

      Longitudinal Hydrophone Profile Data on the Upper Colorado River, Colorado, June 18 to 19, 2019

      In 2019, the U.S. Geological Survey (USGS), in cooperation with the Upper Colorado River Wild and Scenic Stakeholder Group, studied the magnitude and recurrence interval of streamflow needed to initiate bed movement of gravel-sized and finer sediment in a segment of the Colorado River in Colorado to better understand sediment movement and its relation to flow regimes of the river. Bed m

      Date published: July 30, 2020

      Longitudinal Hydrophone Profile Data on the Upper Colorado River, Colorado, June 6 to 8, 2019

      In 2019, the U.S. Geological Survey, in cooperation with the Upper Colorado River Wild and Scenic Stakeholder Group, studied the magnitude and recurrence interval of streamflow needed to initiate bed movement of gravel-sized and finer sediment in a segment of the Colorado River in Colorado to better understand sediment movement and its relation to flow regimes of the river. Bed movement occ...

      Date published: July 30, 2020

      Sediment Size Data from Two Sites on the Upper Colorado River, Colorado, 2019

      In 2019, the U.S. Geological Survey, in cooperation with the Upper Colorado River Wild and Scenic Stakeholder Group, studied the magnitude and recurrence interval of streamflow needed to initiate bed movement of gravel-sized and finer sediment in a segment of the Colorado River in Colorado to better understand sediment movement and its relation to flow regimes of the river. Two stationary h...

      Date published: July 20, 2020

      Ground-based electromagnetic survey, Alamosa, Colorado, March 2020

      Shallow soil conductivity was mapped in the San Luis Valley, Colorado, using the DualEM421 electromagnetic sensor in March 2020. Data were acquired by towing the DualEM421 sensor on a wheeled cart behind an all-terrain vehicle, with the sensor at a height of 0.457 m above the ground surface. Approximately 62 line-kilometers of data were acquired over an area of nearly 1.5 square kilometers%...

      Date published: July 15, 2020

      Environmental-tracer modeling to support hydrogeochemical evaluation of the Fountain Creek Alluvial Aquifer, El Paso County, Colorado, 2018-2019

      This data release contains environmental tracer concentrations, modeled recharge conditions (water temperature, excess air), and resulting estimated groundwater residence times. This dataset supports an integrated hydrogeochemical investigation of solute sources, groundwater recharge processes, and groundwater flow in the Fountain Creek alluvial aquifer. The data release contains f

      Date published: June 25, 2020

      Climatological data for the Loch Vale watershed in Rocky Mountain National Park, Colorado, water years 1992-2019

      This data release contains hourly means of climatological data collected by the U.S. Geological Survey (USGS) from 10/1/1991 to 9/30/2019 at three weather stations in the Loch Vale watershed in Rocky Mountain National Park (RMNP), Colorado. In order of increasing elevation, the three weather stations are Loch Vale meteorological station at RMNP, Colo. (Main weather station

      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: June 1, 2020

      Radar-based field measurements of surface velocity and discharge from 10 U.S. Geological Survey streamgages for various locations in the United States, 2002-19.

      Near-field remote sensing methods were used to collect Doppler velocity and pulsed stage radar data at 10 conventional U.S. Geological Survey streamgages in river reaches with varying hydrologic and hydraulic characteristics. Basin sizes ranged from 381 to 66,200 square kilometers and included agricultural, desert, forest, mixed, and high-gradient mountain environments. During the sitin

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      Year Published: 2020

      Mercury and selenium concentrations in fishes of the Upper Colorado River Basin, southwestern United States: A retrospective assessment

      Mercury (Hg) and selenium (Se) are contaminants of concern for fish in the Upper Colorado River Basin (UCRB). We explored Hg and Se in fish tissues (2,324 individuals) collected over 50 years (1962–2011) from the UCRB. Samples include native and non-native fish collected from lotic waterbodies spanning 7 major tributaries to the Colorado River....

      Day, Natalie K.; Schmidt, Travis; Roberts, James J.; Osmundson, Barbara C.; Willacker, James; Eagles-Smith, Collin

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      Year Published: 2019

      Managing sand along the Colorado River to protect cultural sites downstream of Glen Canyon Dam

      The construction of Glen Canyon Dam in northern Arizona has greatly reduced the supply of sand to the Colorado River corridor through Glen Canyon National Recreation Area and Grand Canyon National Park, hereafter referred to as Glen Canyon and Grand Canyon, respectively. This deficit has strongly affected the natural sediment cycle in this iconic...

      Cook, Terri; East, Amy; Fairley, Helen; Sankey, Joel B.
      Cook, T., East, A., Fairley, H., and Sankey, J.B., 2019, Managing sand along the Colorado River to protect cultural sites downstream of Glen Canyon Dam: U.S. Geological Survey Fact Sheet 2019–3054, 6 p., https://doi.org/10.3133/fs20193054.

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      Year Published: 2019

      Effects of infiltration characteristics on the spatial-temporal evolution of stability of an interstate highway embankment

      Infiltration-induced landslides are among the most common natural disasters threatening modern civilization, but conventional methods for studying the triggering mechanisms and predicting the occurrence of these slides are limited by incomplete consideration of underlying physical processes and the lack of precision inherent in limit-equilibrium...

      Hinds, Eric; Lu, Ning; Mirus, Benjamin B.; Wayllace, Alexandra

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      Year Published: 2019

      Groundwater quality and hydrology with emphasis on selenium mobilization and transport in the Lower Gunnison River Basin, Colorado, 2012–16

      Dissolved selenium is a contaminant of concern in the lower Gunnison River Basin, Colorado. Selenium is naturally present in the Cretaceous Mancos Shale and is leached to groundwater and surface water by irrigation. The groundwater on the east side of the Uncompahgre River in Delta and Montrose Counties is one of the primary sources of selenium...

      Thomas, Judith C.; McMahon, Peter B.; Arnold, L. R.
      Thomas, J.C., McMahon, P.B., and Arnold, L.R., 2019, Groundwater quality and hydrology with emphasis on selenium mobilization and transport in the lower Gunnison River Basin, Colorado, 2012–16: U.S. Geological Survey Scientific Investigations Report 2019–5029, 69 p., https://doi.org/10.3133/sir20195029.

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      Year Published: 2019

      Sand Creek characterization study for Oncorhynchus clarkii virginalis (Rio Grande Cutthroat Trout), Great Sand Dunes National Park and Preserve, Colorado

      The Oncorhynchus clarkii virginalis (Rio Grande cutthroat trout, RGCT) has undergone extensive declines in distribution and population. The RGCT is the southernmost distributed subspecies of cutthroat trout. Native to the Rio Grande Basin in Colorado and New Mexico, the subspecies is also found in the headwaters of the Pecos River and Canadian...

      Mcgee, Ben N.; Todd, Andrew S.; Kevin K. Terry
      McGee, B.N., Todd, A.S., and Terry, K.A., 2019, Sand Creek characterization study for Oncorhynchus clarkii virginalis (Rio Grande cutthroat trout), Great Sand Dunes National Park and Preserve, Colorado: U.S. Geological Survey Scientific Investigations Report 2019–5061, 38 p., https://doi.org/10.3133/sir20195061.

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      Year Published: 2019

      Exploring controls on debris-flow surge velocity and peak discharge at Chalk Cliffs, Colorado, USA

      We present a series of debris-flow events and use combined sensor and video data to explore how sediment concentration and triggering rainfall intensity affect the velocity and discharge of debris-flow surges generated by surface-water runoff. We analyze an initial data set of 49 surges from four debris-flow events recorded by a monitoring system...

      Smith, Joel B.; Kean, Jason W.; Coe, Jeffrey A.
      Smith, J.B., Kean, J.W., and Coe, J.A., 2019, Exploring controls on debris-flow surge velocity and peak discharge at Chalk Cliffs, Colorado, USA, in Kean, J.W., Coe, J.A., Santi, P.M., and Guillen, B.K., eds., Debris-Flow Hazards Mitigation: Mechanics, Monitoring, Modeling, and Assessment, Proceedings of the 7th International Conference on Debris Flow Hazards Mitigation, Golden, Colorado, p. 199-206.

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      Year Published: 2019

      Topographic change detection at Chalk Cliffs, Colorado, USA, using Airborne LiDAR and UAS-based Structure-from-Motion photogrammetry

      The Chalk Cliffs debris-flow site is a small headwater catchment incised into highly fractured and hydrothermally altered quartz monzonite in a semi-arid climate. Over half of the extremely steep basin is exposed bedrock. Debris flows occur multiple times per year in response to rainstorm events, typically during the summer monsoon season. The...

      Barnhart, Katherine R; Rengers, Francis K.; Ghent Jessica N; Tucker, Gregory E.; Coe, Jeffrey A.; Kean, Jason W.; Smith, Joel B.; Staley, Dennis M.; Kleiber, William; Wiens, Ashton M

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      Year Published: 2019

      Taking the pulse of debris flows: Extracting debris-flow dynamics from good vibrations in southern California and central Colorado

      The destructive nature of debris flows makes it difficult to quantify flow dynamics with direct instrumentation. For this reason, seismic sensors placed safely away from the flow path are often used to identify the timing and speed of debris flows. While seismic sensors have proven to be a valuable tool for event detection and early warning, their...

      Michel, A.; Kean, Jason W.; Smith, Joel B.; Allstadt, Kate E.; Coe, Jeffrey A.
      Michel, A., Kean, J.W., Smith, J.B., Allstadt, K., and Coe, J.A. (2019), Taking the pulse of debris flows: extracting debris-flow dynamics from good vibrations in southern California and central Colorado, in Debris-Flow Hazards Mitigation: Mechanics, Monitoring, Modeling, and Assessment, edited by Kean, J.W., Coe, J.A., Santi, P.M., and Guillen, B.K., Association of Environmental and Engineering Geologists, Special Publication #28, p. 154-161.

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      Year Published: 2019

      Geological and geophysical data for a three-dimensional view—Inside the San Juan and Silverton Calderas, Southern Rocky Mountains Volcanic Field, Silverton, Colorado

      IntroductionThe San Juan-Silverton caldera complex located near Silverton, Colorado, in the Southern Rocky Mountains volcanic field is an ideal natural laboratory for furthering the understanding of shallow-to-deep volcanic-related mineral systems. Recent advances in geophysical data processing and three-dimensional (3D) model construction will...

      Yager, Douglas B.; Anderson, Eric D.; Deszcz-Pan, Maria; Rodriguez, Brian D.; Smith, Bruce D.
      Yager, D.B., Anderson, E.D., Rodriguez, B.D., Deszcz-Pan, M., and Smith, B.D., 2019, Geological and geophysical data for a three-dimensional view—Inside the San Juan and Silverton calderas, Southern Rocky Mountains volcanic field, Silverton, Colorado: U.S. Geological Survey Fact Sheet 2019-3026, 4 p., https://doi.org/10.3133/fs20193026.

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      Year Published: 2019

      Constraining parameter uncertainty in modeling debris-flow initiation during the September 2013 Colorado Front Range storm

      The occurrence of debris flows during the September 2013 northern Colorado floods took the emergency management community by surprise. The September 2013 debris flows in the Colorado Front Range initiated from shallow landslides in colluvium. Most occurred on south- and east-facing slopes on the walls of steep canyons in crystalline rocks and on...

      Baum, Rex L.; Scheevel, C.R.; Jones, Eric S.

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      Year Published: 2019

      Imaging spectroscopy for the detection, assessment and monitoring of natural and anthropogenic hazards

      Natural and anthropogenic hazards have the potential to impact all aspects of society including its economy and the environment. Diagnostic data to inform decision-making are critical for hazard management whether for emergency response, routine monitoring or assessments of potential risks. Imaging spectroscopy (IS) has unique contributions to...

      Ong, Cindy; Carrere, Véronique; Chabrillat, Sabine; Clark, Roger N.; Hoefen, Todd M.; Kokaly, Raymond; Marion, Rodolphe; Souza Filho, Carlos Roberto de; Swayze, Gregg A.; Thompson, David R.

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      Year Published: 2019

      Controls on organic matter distributions in Eocene Lake Uinta, Utah and Colorado

      The Green River Formation deposited in Eocene Lake Uinta in the Uinta and Piceance Basins, Utah and Colorado, contains the largest oil shale resource in the world with an estimated 1.53 trillion barrels of oil in-place in the Piceance Basin and 1.32 trillion barrels in the Uinta Basin. The Douglas Creek arch, a slowly subsiding hinge-line between...

      Johnson, Ronald C.; Mercier, Tracey J.; Birdwell, Justin E.
      Johnson, R.C., Birdwell, J.E., and Mercier, T.J., 2018, Controls on organic matter distributions in Eocene Lake Uinta, Utah and Colorado: The Mountain Geologist, Vol. 55, No. 4, p. 177-216

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      Looking southwest from the north side of Kettle Lake 2
      October 17, 2019

      Looking southwest from the north side of Kettle Lake 2

      Looking southwest from the north side of Kettle Lake 2

      North Taylor Creek in Wet Mountain Valley, CO
      October 16, 2019

      North Taylor Creek, Wet Mountain Valley, Colorado

      Image of North Taylor Creek in Wet Mountain Valley, Colorado prior to completion of a surface-water discharge measurement.

      October 11, 2019

      Earth as Art 6

      The Earth As Art project began in the early 2000s, and its original intent remains the same: to produce images that do not look like satellite images at first glance. Earth As Art shows not only what satellites capture in the visible wavelengths of light you and I can see, but also what’s hiding in the invisible wavelengths that Landsat sensors can detect in the infrared

      Ecosystems Podcast Series Episode 5 artwork
      October 3, 2019

      Outstanding in the Field (Ep 5): Fish in the Grand Canyon

      The USGS Ecosystems Mission Area brings you Outstanding in the Field, a series of stories about our science, our adventures, and our efforts to better understand our fish and wildlife and the ecosystems that support them. In this episode we describe some of the one-of-a-kind native fish species that call the Grand Canyon segment of the Colorado River home.
       

      A marine technician works on a large metal apparatus on the deck of a ship with cables and a pully.
      October 1, 2019

      Preparing the jumbo piston corer

      A USGS engineering technician prepares the jumbo piston corer for launching off research vessel Bold Horizon off the coast of California and Oregon. The corer will collect sediment samples from the seafloor. Scientists will examine the sediment to determine its age, character, and distribution. This area off the west coast of the U.S. is prone to hazardous events 

      ...
      August 31, 2019

      Powell150 1869-2019: John Wesley Powell's Legacy of USGS Exploration

      In 2019, the USGS Youth & Education in Science (YES) team marked the 150th anniversary of the first John Wesley Powell expedition down ~1000 miles of the Green & Colorado rivers with a national-scale educational project known as "Powell150." Educational resources about the science along the rivers and a social media campaign around the theme of exploration were

      Attribution: Science Support
      Aquifer testing in Wet Mountain Valley, Colorado
      May 13, 2019

      Aquifer testing in Wet Mountain Valley, Colorado

      Photo of equipment for slug test at aquifer testing site.

      Mountain stream between two cliffs
      December 31, 2018

      Headwaters of the Colorado River

      The headwaters of the Colorado and Gunnison Rivers was selected in 2019 as an Integrated Water Science Basin.

      Attribution: Water Resources
      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.

      A USGS scientist prepares a sample to test the effect of antibiotics on denitrifying bacteria within a glove box
      September 24, 2018

      A USGS scientist prepares a sample to test the effect of antibiotics

      A USGS scientist prepares a sample to test the effect of antibiotics on denitrifying bacteria within a glove box. A glove box allows scientists to work with samples in an anaerobic (no oxygen) atmosphere, the conditions under which denitrification occurs.

      8 people posing for a group photo
      June 19, 2018

      Rocky Mountain NP Dragonfly Mercury Project sampling

      Citizen scientists after a day of collecting dragonfly larvae for the Dragonfly Mercury Project.

      Filter Total Items: 216
      Invasive Burmese Python
      July 10, 2020

      Washington – Today, the U.S. Geological Survey (USGS), U.S. National Park Service (NPS), U.S. Fish and Wildlife Service (FWS) and Conservancy of Southwest Florida announced they have teamed up to radio-track Burmese pythons in Big Cypress National Preserve, Crocodile Lake National Wildlife Refuge and other areas of Southwest Florida.

      dark space with golden solar flare
      March 16, 2020

      The U.S. Geological Survey released a new report on geoelectric hazards for two-thirds of the contiguous U.S., spanning from the northeast to the west coast of the Nation. 

      Tara Bell's photo
      September 20, 2019

      FAIR – Findable, Accessible, Interoperable, Reusable

      scientists holding a test tube with aquatic insects.
      August 30, 2019

      This year marks 150 years since John Wesley Powell and his nine-man crew conducted a scientific expedition of the Green and Colorado rivers. In addition to the goal of mapping the river basin, Powell’s group collected fossils and observed flora and fauna as they journeyed down the river. What did they observe, and what is the focus of USGS ecological studies in the Colorado River Basin now?

      Chemist prepares sample for analysis
      August 9, 2019

      A new analysis of USGS National Water Quality Laboratory (NWQL) quality-control protocols finds that “false-positive” and “false negative” results—reporting that a compound is present in a sample when it is not or that a compound is not present when it is—are minimal.

      National Data Catalog 2.0
      July 25, 2019

      The 2019 NGGDPP Data Preservation Workshop will be held at the Colorado School of Mines, September 24-26, 2019.  Details for the conference are being posted in the NGGDPP data preservation confluence page, feel free to contact nggdpp@usgs.gov with questions.

      USGS
      June 18, 2019

      Personnel from St. Petersburg Coastal and Marine Center, Woods Hole Coastal and Marine Center, Pacific Coastal and Marine Center, and Reston National Center participated in the DataBlast session at the Community for Data Integration Workshop, June 3–7, in Boulder, Colorado; presenting a poster titled "New Imagery Data System for Coastal/Marine Hazards and Resources Program". 

      Mounting sensor on UAS
      June 12, 2019

      The USGS Spectroscopy Laboratory hosted hyperspectral calibration and imaging from unmanned aircraft systems (UAS) training in June.

      Helicopter with geophysical equipment flying near mountains
      April 18, 2019

      On April 2, the USGS hosted an Open House in Silverton, Colorado, about planned airborne geophysical surveys in the Silverton region.

      A huge canyon surrounded by deep-set cliffs opens to reveal a sunny gorge and part of the Colorado River.
      April 11, 2019

      A new study shows that mysterious cycles in salinity in the lower Colorado River are a result of precipitation patterns in the headwaters of the upper basin more than a thousand river miles away. The salinity levels generally repeat about every 10 years.

      Airborne electromagnetic system similar to that which will be used for the Silverton, Colorado survey.
      March 25, 2019

      In the public interest, and in accordance with FAA regulations, the USGS is announcing this low-level airborne project. Your assistance in informing the local communities is appreciated.

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