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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Ground-motion records and site information for Puerto Rico and the US Virgin Islands, 2006-2024 Ground-motion records and site information for Puerto Rico and the US Virgin Islands, 2006-2024
This dataset includes processed ground-motion records and horizontal pseudospectral accelerations (5-percent-damped) from magnitude 4.0-6.4 earthquakes occurring near Puerto Rico between 2006 and 2024. The dataset includes 10,127 records from 849 earthquakes and 71 stations passing automated and manual review. Spectral values are provided at 21 periods (0.01-10 s). It also includes site
Droplet digital PCR data for environmental DNA surveys of Boa imperator in St. Croix, U.S. Virgin Islands, December 2023 and July 2024 Droplet digital PCR data for environmental DNA surveys of Boa imperator in St. Croix, U.S. Virgin Islands, December 2023 and July 2024
Invasive Central American boas (Boa imperator) have established a reproducing population on the western side of St. Croix, U.S. Virgin Islands, as shown by increasing physical capture rates. However, their prevalence throughout the island is largely unknown. The large snakes threaten endemic and endangered species through competition and predation, jeopardizing island biodiversity...
Digital Representation of Geologic Units Above and Beneath Jurassic, Triassic, Permian, Pennsylvanian, and Mississippian Periods from USGS Publications Digital Representation of Geologic Units Above and Beneath Jurassic, Triassic, Permian, Pennsylvanian, and Mississippian Periods from USGS Publications
Paleogeologic information directly above (supracrop) and below (subcrop) geologic periods from U.S. Geological Survey (USGS) reports was digitized from scanned plates. Geologic periods maps include the Jurassic (McKee and Others, 1956), Triassic (McKee and Others, 1959), Permian (McKee and McKee, 1967), Pennsylvanian (McKee and Crosby, 1975), and Mississippian (Craig and Connor, 1979)...
Measurements and photographs of permafrost cores drilled on the Arctic Coastal Plain, Alaska Measurements and photographs of permafrost cores drilled on the Arctic Coastal Plain, Alaska
As the Arctic physical environment undergoes rapid change, permafrost conditions also are shifting. Thawing of ice-rich permafrost can cause terrain instability and compromise infrastructure as the permafrost excess ice content (EIC) melts – EIC refers to the volume of ground ice that exceeds the soil’s pore space when thawed. This dataset provides EIC depth measurements from 38...
Mineral chemistry and U-Th-Pb geochronology of critical mineral-enriched breccia samples from Hicks Dome, southern Illinois Mineral chemistry and U-Th-Pb geochronology of critical mineral-enriched breccia samples from Hicks Dome, southern Illinois
Mineralized breccias at Hicks Dome, Illinois host abundant fluorspar, Pb-Zn sulfides, barite, rare earth elements (REE), and high field strength elements (HFSE). The REE+HFSE mineralogy of breccias between 600 and 900 meters were examined and mineral compositions were determined by electron probe microanalysis (EPMA), using a JEOL 8530F Plus field emission electron microprobe at the U.S
Abandoned Mine Land (AML) Geochemical Data: Henry Mountains and Fremont Mining Districts, UT Abandoned Mine Land (AML) Geochemical Data: Henry Mountains and Fremont Mining Districts, UT
The United States Geological Survey (USGS) collected a total of 179 samples of surficial sediment from abandoned mine wastepiles, ephemeral channels below wastepiles, nearby outcrops, and background areas representative of the undisturbed lithology within the Henry Mountains and Fremont mining districts (Krahulec, 2018). The samples are associated with the following mining claims within...