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Tree-ring widths of Picea engelmannii at Andrews Meadow, Rocky Mountain National Park Tree-ring widths of Picea engelmannii at Andrews Meadow, Rocky Mountain National Park
Andrews Meadow in the Loch Vale watershed, Rocky Mountain National Park. Sample Collection: Englemann spruce (Picea engelmannii) living on slopes surrounding and at the edge of Andrews meadow (Latitude 40˚ 17’ 24” N, Longitude 105˚ 40’ 01” W NAD83). At the time of collection, the climate-sensitive upland P. engelmannii trees were growing on well-drained slopes above the meadow. Seventeen...
Digital database of structure contour and isopach maps of multiple subsurface units, Michigan and Illinois Basins, USA Digital database of structure contour and isopach maps of multiple subsurface units, Michigan and Illinois Basins, USA
This digital data release presents contour data from multiple subsurface geologic horizons as presented in previously published summaries of the regional subsurface configuration of the Michigan and Illinois Basins. The original maps that served as the source of the digital data within this geodatabase are from the Geological Society of America’s Decade of North American Geology project...
Central Alaska Cosmogenic Isotope Burial Age Data Central Alaska Cosmogenic Isotope Burial Age Data
This data release includes three tables containing cosmogenic beryllium-10 and aluminum-26 concentrations and related data from samples collected at seven sites in central Alaska in 2020, prepared at the University of Vermont (UVM), and measured at the Purdue Rare Isotope Measurement lab (PRIME). The file "burialAge_siteLocations_centralAK_bender.csv" contains site locations in the NAD83...
Estimation of hydraulic properties in the Ogallala aquifer near Happy, Texas from slug test results at the North East 2nd Street Superfund site, U.S. Geological Survey data release Estimation of hydraulic properties in the Ogallala aquifer near Happy, Texas from slug test results at the North East 2nd Street Superfund site, U.S. Geological Survey data release
The North East 2nd Street Superfund site in Happy, Texas, overlies a groundwater plume of primarily carbon tetrachloride (CT) that is contained within an upper transmissive zone (EA Engineering, Science, and Technology, Inc., 2019) of the Ogallala aquifer. The Ogallala aquifer is contained at the site in Tertiary-age sediments of the Ogallala Formation, which are described by Nordstrom...
Tables and associated data for effects of impoundments on selected flood-frequency and daily mean streamflow characteristics in Georgia, South Carolina, and North Carolina Tables and associated data for effects of impoundments on selected flood-frequency and daily mean streamflow characteristics in Georgia, South Carolina, and North Carolina
The U.S. Geological Survey (USGS) has a long history of working cooperatively with the South Carolina Department of Transportation to develop methods for estimating the magnitude and frequency of floods for rural and urban basins that have minimal to no regulation or tidal influence. As part of those previous investigations, flood-frequency estimates have been generated at selected...
Geomorphic variables for classification of the Upper Missouri River, Montana and North Dakota Geomorphic variables for classification of the Upper Missouri River, Montana and North Dakota
This dataset consists of seven geomorphic variables attributed to standard river mile address points at 0.1 mile (160 m) intervals between Fort Peck Dam and the headwaters of Lake Sakakawea. The data illustrate the geomorphic variation in this 300-km segment of the Upper Missouri River and are indicative of channel complexity, thought to be an important influence on dispersal and...