Average concentrations of elements in Polk County, Texas

    Counties page > Na in Conterminous US > Na in south-central US > Averages in Polk County (Calculated from cells in the geochemical grid plotting in this area.)
Element Symbol Mean Std. dev. Minimum Maximum
AluminumAl (wt%)1.9470.5910.6753.706
ArsenicAs (ppm)4.2381.4051.51211.568
CalciumCa (wt%)0.3110.2850.0252.155
CopperCu (ppm)4.8881.3141.0038.038
IronFe (wt%)0.8670.2130.3371.709
MercuryHg (ppm)0.0200.0130.0100.107
MagnesiumMg (wt%)0.1000.0430.0230.260
ManganeseMn (ppm)242.053117.01052.810782.681
SodiumNa (wt%)0.1550.1230.0160.516
PhosphorusP (wt%)0.0090.0020.0050.020
LeadPb (ppm)15.4779.4034.27272.259
SeleniumSe (ppm)0.1630.0530.1000.386
TitaniumTi (wt%)0.3160.0770.1430.654
ZincZn (ppm)16.6875.9414.00936.277

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