USGS - science for a changing world

Mineral Resources On-Line Spatial Data

    Counties page > Al in Conterminous US > Al in central US > Averages in Black Hawk County

Average concentrations of elements in Black Hawk County, Iowa

(Calculated from cells in the geochemical grid plotting in this area.)
Element Symbol Mean Std. dev. Minimum Maximum
AluminumAl (wt%)5.2630.4063.5206.185
ArsenicAs (ppm)6.9941.2433.23910.878
CalciumCa (wt%)1.0000.0870.7681.175
CopperCu (ppm)13.7402.5745.66020.255
IronFe (wt%)2.6460.4111.5083.980
MercuryHg (ppm)0.0320.0050.0180.047
MagnesiumMg (wt%)0.4900.0610.2610.591
ManganeseMn (ppm)610.621108.652358.298978.616
SodiumNa (wt%)0.7740.0380.6560.860
PhosphorusP (wt%)0.0700.0160.0380.126
LeadPb (ppm)17.2332.02211.11723.831
SeleniumSe (ppm)0.6270.1000.3350.848
TitaniumTi (wt%)0.2530.0340.1220.304
ZincZn (ppm)58.9148.03130.65676.639

Click here to download point data


Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://mrdata.usgs.gov/geochem/county.php?place=f19013&el=Al&rf=central
Page Contact Information: pschweitzer@usgs.gov
Page Last modified: 14:22 on 20-Dec-2016