this is a very informitive site, the "weez" knows all about the area and has some nice and funny stories of all his finds and theres a great post there that helps a great deal with questions, this guy is a super cool fellow and is willing to help with any questions you may have, land hunt or scuba he does both and may let you in on some of his areas check it out, i go there offten and he keeps is site current with new find and digs, this guy knows his fossils and how to get them
http://www.blackriverfossils.org/
hes in the charleston area
even has a lil geology information about formations to find
the hawthore formation is where the fossils are in charleston and the cooper river washes along that geological formation thats why the fossils are so abundant, here in beaufort county the formation you find the fossils in is called the duplin mar formation in wich or rivers here run over may river morgan river stoney creek, new river and so on
also a nice but complex search to do to find and locate fossil formations in particular areas in south carolina is visit the usgs site provided by the state and look over the surveys they compiled about geological info , theyll list how to distinguish these formations and what the contents are,...
remember that archiology is the study of man made history and fossils will be studied by paleontologist
forgive me for the spelling
hope this helps