Michelle talks about how archeologists analyze pottery and some of the characteristics that are useful for analysis. She also discusses how pottery changed through time in NE Arkansas and how archeologists can tell, relatively, when pottery was made. Here is the link to the timeline that she shares: https://archeology.uark.edu/wp-content/uploads/2015/06/Native-American-Dateline-Arkansas.pdf
As always, check out archeology.uark.edu for more information or to contact your local archeologist.