USGS - science for a changing world

Mineral Resources On-Line Spatial Data

    Counties page > Se in Conterminous US > Se in southwestern US > Averages in San Francisco County

Average concentrations of elements in San Francisco County, California

(Calculated from cells in the geochemical grid plotting in this area.)
Element Symbol Mean Std. dev. Minimum Maximum
AluminumAl (wt%)4.6450.1874.3794.950
ArsenicAs (ppm)7.3100.9675.7578.797
CalciumCa (wt%)1.1950.0991.0871.400
CopperCu (ppm)62.1069.18644.27976.406
IronFe (wt%)2.8040.1722.5253.105
MercuryHg (ppm)0.7860.1630.4781.041
MagnesiumMg (wt%)0.6560.0360.5920.728
ManganeseMn (ppm)686.31851.561606.003779.944
SodiumNa (wt%)1.7820.0411.7031.846
PhosphorusP (wt%)0.0420.0050.0340.049
LeadPb (ppm)1007.300164.215725.2001237.250
SeleniumSe (ppm)0.2890.0460.2030.358
TitaniumTi (wt%)0.4020.0130.3750.412
ZincZn (ppm)270.90952.184173.950346.001

The values shown above were calculated from observations in nearby areas. No samples lie within San Francisco County, California.

Accessibility FOIA Privacy Policies and Notices logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information:
Page Last modified: 14:22 on 20-Dec-2016