Data

The U.S. Geological Survey, in cooperation with the Federal Highway Administration (FHWA) and the Connecticut, Massachusetts, and Rhode Island Departments of Transportation (DOTs), gathered geospatial data to facilitate the development of a regional Stochastic Empirical Loading and Dilution Model (SELDM) application (Granato and others, 2023). As part of this study, the surficial geology...

Composite 30-m resolution bathymetric surface of northern Cascadia Margin offshore Washington. The surface was generated from various publicly available bathymetric datasets available in the region. The surface is available as a geoTIFF file.

This data product develops a composite relative risk index (CRR) for watersheds within the Missouri River Basin, a region in the U.S. on the front line of dreissenid spread. The CRR is developed using datasets in order to account for the direct and indirect damages from a potential infestation along with the risk of an infestation occurring with a HUC10 watershed. Included are indices...

A series of hydrothermal frictional strength experiments was conducted on synthetic gouges prepared from five chlorite-rich samples of varying composition. We present chlorite mineral compositions obtained by electron microprobe techniques, and X-ray diffraction and bulk chemical analyses of the gouges that were prepared by hand-grinding each sample to less than 90-µm grain diameter...

The CZU Lightning Complex Wildfire burned 86,500 acres of forested coastal watersheds in the Santa Cruz Mountains, CA, from August 16 to September 22, 2020. Ash, soil, and stream sediment were collected and characterized as soon as sites could be safely accessed to quantify potential environmental and public hazards from wildfire-related potentially toxic metals and polycyclic aromatic

The USGS computed streamflow during 2016 and 2017 at two sites – one on Bronson Creek (USGS station 453250122494501) and one on Fanno Creek (USGS station 452738122474100), which are tributaries to the Tualatin River in northwestern Oregon. The computed streamflows from the two aforementioned sites were then used to estimate the corresponding streamflow at two other sites- USGS station

This data release contains computed tomography (CT) scans, photographs, geochemistry, grain-size and total carbon analysis, X-ray fluorescence (XRF) scans, X-ray diffraction (XRD), magnetic susceptibility, and gamma-ray bulk density data of gravity cores, push cores, and sediment subsamples from those cores collected in 2022 from the Escanaba Trough vent field, Gorda Ridge, in the...

Two laboratory experiments were conducted to understand PFOS (perfluorooctanesulfonic acid) bioaccumulation in freshwater benthic diatoms (Mayamaea atomus). The first experiment tested bioconcentration at multiple PFOS concentrations (0, 0.01, 0.1, 1, 10, 100 micrograms per liter) after 7 days of exposure. The second explored uptake and depuration of 0.1 micrograms per liter PFOS at...

Groundwater, surface-water, and associated quality assurance samples were collected across western Cape Cod, Massachusetts and analyzed for per- and polyfluoroalkyl substances (PFAS) from September 2019 through November 2024. Water-quality properties measured at the time of sample collection included pH, specific conductance, temperature, and dissolved oxygen. Samples were also analyzed...

This data release contains concentration and isotope-dilution standard (IDS) recovery data from individual samples that are summarized and interpreted in the U.S. Geological Survey (USGS) Techniques and Methods (T&M) Report "Determination of Per- and Polyfluoroalkyl Substances in Water by Direct Injection of Matrix-Modified Centrifuge Supernatant and Liquid Chromatography-Tandem Mass...

Per-and polyfluoroalkyl substances (PFAS) are frequently found in streams, with most research focusing on urban sources of PFAS to surface water (e.g., firefighting foams, industrial releases, and wastewater treatment plant discharges). Pesticide applications are an under-investigated source of PFAS to streams in both agricultural and urban areas. There are few studies that analyze the...

These data, modified from Horton and San Juan (2016), are a consolidation of point and polygon features representing mine and prospect-related symbols shown on U.S. Geological Survey (USGS) 7.5- and 15-minute topographic maps from the Historical Topographic Map Collection (HTMC). This consolidation supports more accurate counts of mine features represented in the database, which are...