USGS Geochemical and Mineralogical Maps

[GeoSteve]

Hello everyone,

I recently discovered this work by Smith et al. who mapped the soil geochemistry and mineralogy at 4857 sites evenly distributed across the continental US. Measurements were made not only at the surface, but the subsurface as well.

https://pubs.usgs.gov/sir/2017/5118/index.html

You can download the maps in several formats. The KML Google Earth format is very straightforward to use, and you can also display the sampling site locations, very handy to put sparse measurements into context.

[James Luck]

Sweet ive been looking for a map of USA soil sampling for sometime. thanks for finding the link.
I'm especially interested in the Chicago land area, as I'm a resident. do you know did Smith add the date of sampling as well? as in most industry based regions the soil geology was changed over time.

-james luck