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Detrital sanidine geochronology related to early Colorado River deposits, Arizona and California Detrital sanidine geochronology related to early Colorado River deposits, Arizona and California
Reported here are detrital sanidine argon geochronology data collected to better understand the early evolution of the Colorado River system. Samples were collect throughout the lower Colorado River corridor from Lake Mead to near Cibola, Arizona. Most samples are of the Bouse Formation but also include the deposits of Hualapai Wash, the Lost Cabin beds, and recent Colorado River...
Soil-Water-Balance model and data used in the hydrogeologic framework and conceptual groundwater-flow model of the panhandle and northwest parts of the High Plains (Ogallala) aquifer in Oklahoma, 1998–2022 Soil-Water-Balance model and data used in the hydrogeologic framework and conceptual groundwater-flow model of the panhandle and northwest parts of the High Plains (Ogallala) aquifer in Oklahoma, 1998–2022
The U.S. Geological Survey (USGS), in cooperation with the Oklahoma Water Resources Board (OWRB), constructed a Soil-Water-Balance (SWB) model of the High Plains aquifer system (hereinafter referred to as the "Ogallala aquifer" in northwestern Oklahoma. The SWB model as well as supplementary data were used to (1) estimate recharge to the Ogallala aquifer in northwestern Oklahoma, and (2)...
Synthetic geologic deformation model distributions for use in 2025 USGS Puerto Rico-U.S. Virgin Islands National Seismic Hazard Model update Synthetic geologic deformation model distributions for use in 2025 USGS Puerto Rico-U.S. Virgin Islands National Seismic Hazard Model update
This Data Release provides synthetic probability density functions used in the geologic deformation model as part of the 2025 National Seismic Hazard Model update for Puerto Rico-U.S. Virgin Islands. We include files implemented in the earthquake rupture forecast using the inversion framework. Modeling philosophy and methodologies are described in the interpretative companion manuscript...
Western U.S. Date of Last Event (DOLE) for use in time-dependent probabilistic seismic hazard analyses Western U.S. Date of Last Event (DOLE) for use in time-dependent probabilistic seismic hazard analyses
This Data Release contains two compilations provide information on the date of the last known earthquake in the U.S. where available (conterminous U.S. and Alaska). There are two spatial datasets with different feature geometries — line features (“HistDOLE_v1”) and point features (“PaleoDOLE_v1”). The line features describe surface ruptures constrained by historical or near-historical...
Reproduction and locations of oaks in Yolo County, California, USA from 2013-2023 Reproduction and locations of oaks in Yolo County, California, USA from 2013-2023
Oaks were mapped in a portion of Yolo County, California, USA. For 26 focal trees, acorn counts were conducted from 2013-2023. Trees were located in rural and urban areas. Rural trees were located visually and location was recorded. Urban tree locations were drawn from randomly distributed point locations at 1.2 valley oaks per hectare. The data also include distance between oak trees to...
Grain size analysis and total carbon content of augered sediment samples from Barter Island, Alaska Grain size analysis and total carbon content of augered sediment samples from Barter Island, Alaska
This data release contains grain size and total carbon analysis of sediment samples from 1 inch hand-augered cores collected from Barter Island, Alaska. These data were collected in 2016 and 2019 (USGS Field Activity 2016-645-FA and 2019-634-FA). Data include location information (latitude, longitude, depth), and the weight percent of 65 phi bins, four size fractions (gravel, sand, silt...