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Results from dynamic cone penetration testing of soils at hydrologic monitoring sites across Puerto Rico Results from dynamic cone penetration testing of soils at hydrologic monitoring sites across Puerto Rico
A Smart Dynamic Cone Penetrometer (DCP) system allows for the partially automated collection of cone penetrometer data (CPT) to determine mechanical properties of soil along a vertical profile. A smart DCP system was used to collect soil penetration-with-depth values at 19 sites across the mountainous regions of Puerto Rico. The 19 sites were co-located at the United States Geological...
Hydroacoustic Data to Support Embayment Monitoring in Long Island Sound, Farm River Embayment, Connecticut, 2023-2025 Hydroacoustic Data to Support Embayment Monitoring in Long Island Sound, Farm River Embayment, Connecticut, 2023-2025
This data release includes hydroacoustic data for the 2023 to 2025 water years at one station. This station is part of a discrete and continuous monitoring project in embayments on Long Island Sound to support nutrient management activities in Connecticut. The data were collected by the U.S Geological Survey (USGS) in cooperation with the Connecticut Departments of Energy and...
Estimates of vertical groundwater/surface-water exchange using the tempest1d model: Data from selected locations within the Big Soos Basin, WA from July 2023 through July 2024 Estimates of vertical groundwater/surface-water exchange using the tempest1d model: Data from selected locations within the Big Soos Basin, WA from July 2023 through July 2024
This dataset includes sediment temperature data collected from seven locations within the Big Soos creek basin from July 2023 to July 2024. Data collection took place at two locations on Covington Creek and Big Soos Creek, and single locations on Jenkins Creek, Little Soos Creek, and Soosette Creek. See "BigSoos.sites.csv" for field IDs, descriptions, and locations of these seven sites...
Geochronology and geochemistry of Paleoproterozoic metamorphic rocks in the Midcontinent Geochronology and geochemistry of Paleoproterozoic metamorphic rocks in the Midcontinent
We present isotopic and geochemical data for several Archean and Paleoproterozoic metamorphic rocks in the Penokean orogen, USA. These data include new U-Pb and trace element analyses of apatite, titanite, and monazite; bulk rock major and trace element compositions; and whole rock and garnet Lu-Hf and Sm-Nd isotope compositions.
Carboniferous cyclicity in the Arkoma Basin, Arkansas in the Midcontinent of North America Carboniferous cyclicity in the Arkoma Basin, Arkansas in the Midcontinent of North America
In this data release we present zircon U-Pb ages and εHf(t), feldspar 40Ar/39Ar ages, and whole rock major and trace elemental abundances to constrain the Morrowan-Atokan Boundary, the timing of onset of high-frequency cycles and the redox and salinity changes associated with rapidly changing depositional environments within the Arkoma Basin. Zircon and sanidine data were collected from...
TA HVSR Curves and Peak Frequencies TA HVSR Curves and Peak Frequencies
Earthquake ground motions are modified by local geologic site conditions. Soft soils and basin sediments may amplify and prolong the duration of ground shaking, necessitating site characterization to improve existing ground motion predictions and seismic hazard analyses. Horizontal-to-Vertical Spectral Ratio (HVSR) measurements distinguish one or more site resonant frequencies and the...