Skip to main content
Advanced Search

Filters: Tags: Minnesota (X) > Types: Citation (X) > partyWithName: U.S. Geological Survey (X)

3,593 results (16ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
thumbnail
High radium (Ra) concentrations in potable portions of the Cambrian-Ordovician (C-O) aquifer system were investigated using water-quality data and environmental tracers ( 3H, 3Hetrit, SF6 , 14C and 4Herad) of groundwater age from 80 public-supply wells (PSWs). Groundwater ages were estimated by calibration of tracers to lumped parameter models and ranged from modern (1 Myr) in the most downgradient, confined portions of the potable system. More than 80 and 40 percent of mean groundwater ages were older than 1000 and 50,000 yr, respectively. Anoxic, Fe-reducing conditions and increased mineralization develop with time in the aquifer system and mobilize Ra into solution resulting in the frequent occurrence of combined...
thumbnail
The dataset contains estimates for total phosphorus flux from wastewater treatment plants that discharge to surface water within the Red River of the North Basin in the United States and subbasins. Shapefiles defining the subbasins are available as part of the same data release in which these data are published. Estimates of wastewater treatment plant total phosphorus flux (or load) were calculated by Tammy Ivanhnenko for the years 1978, 1980, 1982, 1984, 1986, 1988, 1990, 1992, 1996, 2000, 2004, 2008, and 2012. Flux estimates were based on the average discharge from the wastewater treatment plants and treatment level, both reported as part of the U.S. Environmental Protection Agency's Clean Watershed Needs Survey,...
thumbnail
The table contains oxide and cation compositions of olivine grains from drill core of the Duluth Complex, Minnesota. The oxides were determined by electron probe microanalysis (EPMA) and are reported in weight percent (wt%). The cations were calculated based on the oxide compositions and are reported in mole percent (mol%). Olivine is a magnesium iron orthosilicate mineral with the formula (Mg2+, Fe2+)2SiO4. Olivine forms a solid solution series with magnesium (Mg) at one end and iron (Fe) at the other. Forsterite (Mg2SiO4) is the magnesium endmember and fayalite (Fe2SiO4) is the iron endmember. Minor elements can substitute into the crystal structure, such as manganese (Mn) and nickel (Ni). To better understand...
map background search result map search result map Wastewater Treatment Plant Total Phosphorus Flux Load Estimates Red River of the North Basin USGS US Topo 7.5-minute map for Skull Lake OE N, MN-MB 2016 USGS Topo Map Vector Data (Vector) 18328 Green Isle, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 24311 Lake Agnes, Minnesota 20220508 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 76273 Pigeon Point OE E, Minnesota 20190903 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 1039 Angle Inlet SW, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 10091 Cordova, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 11742 Deer Lake NE, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 13579 Echo Lake, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 13664 Edgerton South, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 15112 Federal Dam, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 35116 Pigeon Dam Lake MN (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 38229 Rock Dell, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 44838 Thief Lake NE, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 3889 Big Woods NW, North Dakota 20200723 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 3889 Big Woods NW, North Dakota 20200723 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 8672 Christine, North Dakota 20200723 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 13194 Dwight, North Dakota 20200723 for 7.5 x 7.5 minute Shapefile Oxide and Cation Compositions of Olivine Grains from Drill Core in the Duluth Complex, Minnesota Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 3. Detailed information on calculations of environmental tracer data. USGS US Topo 7.5-minute map for Skull Lake OE N, MN-MB 2016 USGS Topo Map Vector Data (Vector) 18328 Green Isle, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 24311 Lake Agnes, Minnesota 20220508 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 76273 Pigeon Point OE E, Minnesota 20190903 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 1039 Angle Inlet SW, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 10091 Cordova, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 11742 Deer Lake NE, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 13579 Echo Lake, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 13664 Edgerton South, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 15112 Federal Dam, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 35116 Pigeon Dam Lake MN (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 38229 Rock Dell, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 44838 Thief Lake NE, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 3889 Big Woods NW, North Dakota 20200723 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 3889 Big Woods NW, North Dakota 20200723 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 8672 Christine, North Dakota 20200723 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 13194 Dwight, North Dakota 20200723 for 7.5 x 7.5 minute Shapefile Oxide and Cation Compositions of Olivine Grains from Drill Core in the Duluth Complex, Minnesota Wastewater Treatment Plant Total Phosphorus Flux Load Estimates Red River of the North Basin Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 3. Detailed information on calculations of environmental tracer data.