Skip to main content
Advanced Search

Filters: Tags: Illinois (X)

7,949 results (3.1s)   

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...
map background search result map search result map USGS Topo Map Vector Data (Vector) 862 Ames, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 15215 Fiatt, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 15272 Findlay, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 23177 Kellerville, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 42269 South Pekin, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 47080 Wacker, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 48160 West Chicago, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 48189 West Frankfort, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 2488 Barrington, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 4250 Blackstone, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 5553 Broadwell, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 16729 Galva, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 21473 Humrick, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 22317 Jacksonville, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 23744 Kirkland, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 23698 Kinsman, Illinois 20210629 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 23780 Kishwaukee, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 24098 La Hogue, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 27134 Macomb, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 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 Topo Map Vector Data (Vector) 862 Ames, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 15215 Fiatt, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 15272 Findlay, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 23177 Kellerville, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 42269 South Pekin, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 47080 Wacker, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 48160 West Chicago, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 48189 West Frankfort, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 2488 Barrington, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 4250 Blackstone, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 5553 Broadwell, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 16729 Galva, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 21473 Humrick, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 22317 Jacksonville, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 23744 Kirkland, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 23698 Kinsman, Illinois 20210629 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 23780 Kishwaukee, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 24098 La Hogue, Illinois 20210628 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 27134 Macomb, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 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.