Kelsey Jordahl
@kajord
@DynamicWebPaige @kwinkunks e.g. http://pubs.usgs.gov/of/2006/1272/ The 50 states maps are pretty good now (http://mrdata.usgs.gov/geology/state/)
2/19/2015, 4:22:11 PM
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linkKelsey Jordahl
@kajord
@DynamicWebPaige @kwinkunks and they've been doing it for a long time. Paper from 1982: http://pubs.er.usgs.gov/publication/70011542
2/19/2015, 4:23:03 PM
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