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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Topographic Wetness Indexes for the Upper and Lower Colorado River Basins Topographic Wetness Indexes for the Upper and Lower Colorado River Basins
This U.S. Geological Survey (USGS) data release describes two 30-meter (m) raster datasets of topographic wetness indexes (TWI) for the Upper and Lower Colorado River basins. The data reside in GeoTIFF (Geographic Tagged Imaged File Format) multiplied by 10 and saved as an integer file to reduce space (colorado14_twX100i.tif and colorado15_twiX100.tif). The TWI units are dimensionless...
Bridge-Site Study Data for Selected Highway Crossings in Mississippi, 2024 Bridge-Site Study Data for Selected Highway Crossings in Mississippi, 2024
The U.S. Geological Survey (USGS) works closely with the Mississippi Department of Transportation (MDOT) to provide information to be used by the MDOT for design of highway-drainage structures. MDOT spends millions of dollars annually for highway construction. Streamflow records, hydrologic analyses of basins, and hydraulic analyses of flooding potential at proposed highway crossings...
Data supporting the validation of First Annulus of Grass Carp Ctenopharyngodon idella and Silver Carp Hypophthalmichthys molitrix Data supporting the validation of First Annulus of Grass Carp Ctenopharyngodon idella and Silver Carp Hypophthalmichthys molitrix
A total of 83 Grass Carp and 92 Silver Carp were collected monthly from stocked ponds at Columbia Environmental Research Center. Length, weight, and collection date were recorded. The dorsal-fin rays and lapilli otoliths were collected from these specimens for the purpose of aging. An additional set of dorsal-fin rays and lapilli otoliths from Grass Carp collected in Truman Reservoir...
Geochemical data, thin section images, and modal mineralogy of selected bedrock samples in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina Geochemical data, thin section images, and modal mineralogy of selected bedrock samples in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina
This data release contains geochemical data, thin section images, and modal mineralogy from bedrock samples collected in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina. The geochemical data comprise whole-rock major oxide and trace element abundances in 246 samples. Pairs of thin section images in plane-polarized light and cross-polarized light are...
Campylorhynchus brunneicapillus Single Nucleotide Polymorphism Genotype Data from Southern California, USA Campylorhynchus brunneicapillus Single Nucleotide Polymorphism Genotype Data from Southern California, USA
This dataset contains 184 single nucleotide polymorphism (SNP) genotypes of Campylorhynchus brunneicapillus (Cactus Wren) sampled in southern California. Genomic markers were generated from ddRAD loci and analyzed using the Stacks v2.60 pipeline. The genotypes for all samples are provided in a VCF file with 40,707 independent loci. A companion sample data file is provided with sample...
Harbison's Dun Skipper (Euphyes vestris harbisoni) Single Nucleotide Polymorphism Genotype Data from Southern California Harbison's Dun Skipper (Euphyes vestris harbisoni) Single Nucleotide Polymorphism Genotype Data from Southern California
This dataset contains genotypes from 148 Harbison's dun skipper (Euphyes vestris harbisoni) collected in San Diego and Orange County, California (USA). Genomic markers were generated using the 2RAD restriction-associated DNA sequencing protocol, aligned to a reference genome of Euphyes dion (genome assembly GCA_018251475.1) and analyzed using Stacks v2.53. The genotypes for all samples...