Average concentrations of elements in Robertson County, Texas

    Counties page > Al in Conterminous US > Al in south-central US > Averages in Robertson County (Calculated from cells in the geochemical grid plotting in this area.)
Element Symbol Mean Std. dev. Minimum Maximum
AluminumAl (wt%)2.1150.5100.9243.565
ArsenicAs (ppm)4.0891.1801.7067.337
CalciumCa (wt%)0.1550.0830.0440.788
CopperCu (ppm)3.6011.4341.0018.154
IronFe (wt%)1.2440.3530.6582.352
MercuryHg (ppm)0.0180.0080.0100.050
MagnesiumMg (wt%)0.1100.0360.0500.333
ManganeseMn (ppm)336.393312.26066.2931699.650
SodiumNa (wt%)0.1740.0940.0340.494
PhosphorusP (wt%)0.0140.0050.0060.030
LeadPb (ppm)15.2492.0907.61924.627
SeleniumSe (ppm)0.2400.0980.1050.595
TitaniumTi (wt%)0.3080.0390.2290.455
ZincZn (ppm)22.4895.91211.36936.945

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