Data

This dataset details mercury concentrations across sediments, water, and biological tissue (juvenile yellow perch [Perca flavescens]) collected from 30 freshwater lakes within and adjacent to Voyageurs National Park between 2000-2025. The dataset contains over 1000 measurements of total mercury in fish tissue and over 500 measurements of methylmercury and total mercury in unfiltered...

This dataset details concentration and stable isotope ratio measurements for mercury across sediments, water, and biological tissue (Lepomis macrochirus, Bluegill and Micropterus salmoides, Largemouth bass) collected from the Mobile River in Alabama between 2023 and 2025. In 2025, sediment collections from the Stauffer Cold Creek Plant and Lemoyne Plant Superfund Sites in Axis and Bucks...

A map of Quaternary faults has been generated for the offshore part of the U.S. Cascadia subduction zone in Federal and Tribal waters along the outer coast of northern California, Oregon, and Washington. These data contain lines representing the location of faults with known or suspected Quaternary (

This data release contains in situ geochronologic and geochemical data for zircon, titanite, apatite, biotite, and feldspar from Proterozoic rocks of the eastern Mojave Desert, California and Nevada, including the Mesoproterozoic Mountain Pass intrusive suite and its Paleoproterozoic host rocks. Data include zircon U-Pb and trace-element compositions, titanite U-Pb and trace-element...

This data set presents chemical data for water column samples from USGS and Klamath Tribe sites in Upper Klamath Lake, Oregon. Surface water, bottom water and integrated water samples were analyzed for major cations including metals and anions including chloride, sulfate, alkalinity, phosphate silicate and nitrate. Values for pH ranging from 7.3 to 10.0 are also reported.

Observations of irrigated agricultural land within the Big Chino Groundwater Subbasin of the Verde River Groundwater Basin in Arizona. Crops were verified in situ once in 2025 on Jun 6th; based on digitized field boundaries. Field boundaries were digitized from U.S. Department of Agriculture, National Agriculture Imagery Program County Mosaic 2025 imagery for Arizona and supplemented...

These data were created to support a geonarrative of the Anacostia River watershed's modeled 6PPDQ sources, which was funded by the Washington D.C. Department of Energy and Environment (DOEE), Chesapeake Bay Priority Ecosystem Studies, and USGS Cooperative Matching Funds. This dataset contains a CSV file with a summary of potential sources of 6PPDQ within catchments of the Anacostia...

This collection of four companion child items documents water-quality conditions and hydrologic characteristics at stream monitoring sites in the Quinault, Queets, and Moclips River watersheds on the Olympic Peninsula of Washington State. Data were collected from May 2023, through December 2024, at up to seven sites on the Quinault Indian Reservation to support water-quality survey...

This dataset covers Rock-Eval and reflectance data.

Pb isotopic compositions of soils located in Los Angeles County, California, USA.

This data release documents 43 horizontal-to-vertical spectral ratio (HVSR) passive seismic measurements collected at 24 locations in the Virginia Coastal Plain within Fairfax and Prince William Counties during June and July 2025. The HVSR method uses a three-component seismometer to measure vertical and horizontal components of ambient seismic noise over a frequency range of...

Northern Puerto Rico hosts karst within carbonate units of Oligocene and Miocene age. Lidar-derived elevation data, acquired in 2018, were used to create a mosaic of 3-meter resolution working digital elevation models (DEMs), from which surface depressions were identified using a semi-automated workflow in ArcGIS. Depressions in the automated inventory were systematically checked using...