For those interested in the county formations in SC over time take a look at
this website, http://www.familyhistory101.com/maps/sc_cf.html
. There is an
underscore character between the sc and cf in the above URL. You can select
"play" and watch it advance through time or select dates.
For other states just change the state abbreviation. Example, change "sc" to
"ms" for Mississippi.
I can not attest to the accuracy of the data.