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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...
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This dataset provides a subset of well construction information provided by the driller's well logs. Complete well logs can be accessed on the Minnesota Well Index online (http://www.health.state.mn.us/ divs/eh/cwi/).
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This dataset provides aqueous nitrate+nitrite, aqueous manganese, aqueous iron, and total sulfate measurements in groundwater samples from 254 newly constructed private residential wells between 2014 and 2016. The study focuses on three geologically distinct regions of Minnesota: central, northwest, and northeast. These study regions were chosen due to their prevalent elevated As concentrations in drinking water. Each of the 254 wells were sampled in three rounds by the Minnesota Department of Health (MDH). The timing of the three sampling rounds was (1) immediately or shortly after well construction (round 1); (2) 3-6 months after initial sample collection (round 2); and (3) 12 months after initial sample collection...
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These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.
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These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.


map background search result map search result map 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) 2036 Babbitt SE, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 7972 Central Lakes, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 9931 Cook, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 10259 Cotton, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 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) 14781 Fairbanks, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 15579 Floodwood, Minnesota 20220508 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 16159 Fourtown Lake, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 23207 Kelsey, Minnesota 20220506 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 40013 Sassas Creek, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 41254 Side Lake, Minnesota 20220506 for 7.5 x 7.5 minute FileGDB 10.1 Selected well construction information Oxide and Cation Compositions of Olivine Grains from Drill Core in the Duluth Complex, Minnesota USGS Topo Map Vector Data (Vector) 9014 Clayton, Missouri 20210623 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 10724 Creve Coeur, Missouri 20210623 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 14639 Eureka, Missouri 20210622 for 7.5 x 7.5 minute FileGDB 10.1 USGS NED 1/3 arc-second Contours for Duluth E, Minnesota 20220429 1 X 1 degree FileGDB 10.1 USGS NED 1/3 arc-second Contours for Saint Louis E, Missouri 20210929 1 X 1 degree FileGDB 10.1 Aqueous nitrate+nitrite, aqueous manganese, aqueous iron, and total sulfate data 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) 2036 Babbitt SE, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 7972 Central Lakes, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 9931 Cook, Minnesota 20220507 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 10259 Cotton, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 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) 14781 Fairbanks, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 15579 Floodwood, Minnesota 20220508 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 16159 Fourtown Lake, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 23207 Kelsey, Minnesota 20220506 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 40013 Sassas Creek, Minnesota 20220507 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 41254 Side Lake, Minnesota 20220506 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 9014 Clayton, Missouri 20210623 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 10724 Creve Coeur, Missouri 20210623 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 14639 Eureka, Missouri 20210622 for 7.5 x 7.5 minute FileGDB 10.1 USGS NED 1/3 arc-second Contours for Duluth E, Minnesota 20220429 1 X 1 degree FileGDB 10.1 USGS NED 1/3 arc-second Contours for Saint Louis E, Missouri 20210929 1 X 1 degree FileGDB 10.1 Oxide and Cation Compositions of Olivine Grains from Drill Core in the Duluth Complex, Minnesota Selected well construction information Aqueous nitrate+nitrite, aqueous manganese, aqueous iron, and total sulfate data