Data Releases
The data collected and the techniques used by USGS scientists should conform to or reference national and international standards and protocols if they exist and when they are relevant and appropriate. For datasets of a given type, and if national or international metadata standards exist, the data are indexed with metadata that facilitates access and integration.
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Predicted Physical Habitat Metrics for the Chesapeake Bay watershed at the 1:24k scale, 1985-2023 Predicted Physical Habitat Metrics for the Chesapeake Bay watershed at the 1:24k scale, 1985-2023
Degraded physical habitat is a common stressor affecting river ecosystems and a primary focus of management activities, including stream restorations. In order to assess regional conditions and help prioritize management efforts, there is an ongoing need to provide estimates of different aspects of instream physical habitat conditions at spatially continuous scales. We utilized over 16...
Whole-rock geochemical data for volcanic rocks sampled in northwestern Utah and adjacent states Whole-rock geochemical data for volcanic rocks sampled in northwestern Utah and adjacent states
This release of whole-rock geochemical data for northwestern Utah and adjacent states is for volcanic rocks sampled and analyzed from 1977 to present. The rocks range from Eocene to Quaternary in age and represent lava flows, tuffs, and subvolcanic intrusions. The data release includes new, previously unpublished data as well as results for USGS-processed samples that are publicly...
Biological soil crust and vegetation cover from two previously grazed grasslands within Canyonlands National Park, Utah Biological soil crust and vegetation cover from two previously grazed grasslands within Canyonlands National Park, Utah
These tabular data were compiled to monitor vegetation and biocrust cover two previously grazed grassland located in the Needles District of Canyonlands National Park. Objectives of this study are to document potential changes in biological soil crust (biocrust) and vegetation cover and species composition over time and with ongoing U.S. National Park Service (NPS) management. These data...
Dataset describing riparian vegetation trends of selected areas in Baja California Sur, Mexico from 2016-2024 Dataset describing riparian vegetation trends of selected areas in Baja California Sur, Mexico from 2016-2024
This dataset includes raster images of trends in normalized difference vegetation index (NDVI) derived from Sentinel-2 imagery for riparian vegetation within the Los Planes watershed of Baja California Sur, Mexico. A model was first trained to identify riparian vegetation using cloud-masked Sentinel-2 imagery from 2016-2024 and stream delineations derived from a 10m Japanese Aerospace...
Aquatic reflectance data from Sentinel-2 satellite imagery paired with discrete chlorophyll-a measurements in Oregon, Ohio, and Florida in the United States from January 2016 through September 2023 Aquatic reflectance data from Sentinel-2 satellite imagery paired with discrete chlorophyll-a measurements in Oregon, Ohio, and Florida in the United States from January 2016 through September 2023
Aquatic reflectance data from Sentinel-2 satellite imagery is paired with discrete chlorophyll measurements across Oregon, Ohio, and Florida in the United States. The dataset contains a csv data file (CyAN_S2_Matched_WQ_S2.csv), a csv data dictionary file (CyAN_S2_Matched_WQ_S2_data_dictionary.csv) that describes each of the columns in the data file, and a zip file of python scripts...
SHRIMP U-Pb geochronologic data for Elkhorn Mountains Volcanics and Boulder batholith satellite plutons, western Montana, U.S.A. SHRIMP U-Pb geochronologic data for Elkhorn Mountains Volcanics and Boulder batholith satellite plutons, western Montana, U.S.A.
These data are for a geochronologic study of Cretaceous Elkhorn Mountains Volcanics and several discrete satellite plutons adjacent to the Cretaceous Boulder batholith of western Montana. Zircon from the two volcanic units of the Elkhorn Mountains Volcanics and four samples of satellite plutons of the Boulder batholith were dated by sensitive high resolution ion microprobe (SHRIMP). When...
Calibration data from Mount Hamilton, California, for USGS Volcano Science Center gravimeters Calibration data from Mount Hamilton, California, for USGS Volcano Science Center gravimeters
Temporal changes in gravity, also called microgravity in volcano geodesy and exploration geophysics applications, provide a means of measuring mass change beneath the surface—for example, due to the accumulation or withdrawal of water, magma, or other fluids. Relative spring-based gravimeters, however, require calibration to establish consistency between instruments, and to assess...
Water Quality of Terminal Lakes Across the Great Basin of the Western United States, 2023 – 2026 Water Quality of Terminal Lakes Across the Great Basin of the Western United States, 2023 – 2026
The Great Basin of the Western United States hosts dozens of terminal lake systems that provide critical, abundant, and diverse ecosystems that support migratory bird species, local wildlife, and nearby communities. Water quality varies across terminal lakes in the region depending on basin geology, anthropogenic water use, climate, hydrology, and water quantity. Seasonal and long-term...
Modeled riparian plant community habitat suitability along the Colorado River in Grand Canyon in support of resource impact analysis for Post-2026 reservoir operational alternatives Modeled riparian plant community habitat suitability along the Colorado River in Grand Canyon in support of resource impact analysis for Post-2026 reservoir operational alternatives
These data were compiled in support of the Post-2026 Operational Guidelines and Strategies for Lake Powell and Lake Mead (Post-2026) Environmental Impact Statement (EIS). These data were used to illustrate how six operational strategies (one baseline and 5 alternatives) for Glen Canyon Dam could affect riparian plant communities along the Colorado River between Glen Canyon Dam and Lake...
Modeled sand transport, sandbar volumes, and reservoir operations for the Colorado River in Grand Canyon in support of resource impact analysis for Post-2026 reservoir operational alternatives Modeled sand transport, sandbar volumes, and reservoir operations for the Colorado River in Grand Canyon in support of resource impact analysis for Post-2026 reservoir operational alternatives
These data were compiled in support of the Post-2026 Operational Guidelines and Strategies for Lake Powell and Lake Mead (Post-2026) Environmental Impact Statement (EIS). These data were compiled to predict the impact of different proposed alternatives for Glen Canyon Dam operations on sand resources, including sand mass balance, sandbar volume, and frequency/duration of controlled...
Copper concentrations and associated morphometric data from brook trout (Salvelinus fontinalis) and copper results from macroinvertebrates and zooplankton at 6 lakes in Sequoia National Park, CA, 2021-2022 Copper concentrations and associated morphometric data from brook trout (Salvelinus fontinalis) and copper results from macroinvertebrates and zooplankton at 6 lakes in Sequoia National Park, CA, 2021-2022
This dataset encompasses a series of files related to a comprehensive ecotoxicology research project conducted in high elevation lakes of the Tokopah Basin in Sequoia National Park. The dataset includes detailed sampling data that reflects the copper concentrations at multiple levels of the food web. This dataset also includes morphometric data for collected fish, biomarkers of fish...
Passive acoustic telemetry detections of Black Carp Mylopharyngodon piceus in the Mississippi River Basin; 2021-2023 Passive acoustic telemetry detections of Black Carp Mylopharyngodon piceus in the Mississippi River Basin; 2021-2023
This dataset represents passively detected locations of acoustic telemetry tagged Black Carp in the Mississippi and Missouri rivers near their confluence. These river segments consisted of both open river and impounded habitat present during observed hydrologic conditions from 2021-2023. Receiver arrays were set in known use areas (determined by active relocations of tagged fish) and set...