@sheldonj,
If the date of >10K years is important to your argument. Id look for some of the "PaleoIndian sites" of South Carolina and find some artifcts from a museum and, using the museums evidence, show the dates are no younger than... 10000 years old.
Another thing would be pollen data from depths of bog sediments along the PeeDee or some other boggy terrains. There are some fossil deposits in limestone cave and sinkholes that contain elephant fossils and some other megafauna that were common in the late Plesitocene)
making the argument that the fossils, pollen, or artifcts ARE greater than 10000 years is where the tricky part comes in , especially if this may become a controversy within your college class.
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"cicerone Imposter" is a beer expert so he's feisty and loves arguments. YOU, on the other hand, must approach this problem with a bit of tact. I would not present anything of great geologic age because I think youd merely be confronted with "YOU HAVE NO EVIDENCE WE CAN ACCEPT"
THE very best data would be tree ring data. Tree ring are so easy to understand, that even a judge or attornies would have to understand how they work. However, because the SC climate has been humid an temperate through the past Ice Age to the present, I don't think thered be any available construction for which e could count on doing cross indexing of overlapping tree rings. (South Carolina had a climate similar to that of Maine during the height of the Wisconin glaciation and there are NO glacial deposits in SC., so your best age bearing data would be cultural).
There are some geologic events that could be used (like several earthquakes from the present to the mid Pleistocene), but , again, youd be vulnerable to discuss how you arrive at the dates and if you have no dealings in geology, youd lose the argument.
Would your class Instructor accept anything that would be based on radioisotope dating or magnetic dating? Or would that merely leave you vulnerable to "prove it"?