81833--Dovetailed base, but VERY thin--Illinois

I've been studying this dovetailed-base point for a couple weeks and am still no closer to saying "It's a Dovetail" than that first day. Yes, the basal edge is ground, the flaking is Early Archaic pressure chipping--any yes, the flint is mineralized as would any 7500BP Early Archaic point--that's to say the piece is obviously real, but what to call it isn't so easy. Some Gibson points and Grand Points have that symmetrical "dovetailed" base, but they're Woodland Culture, not Early Archaic---read that as 'they wouldn't have a well ground basal edge'. Is it just an "anomaly" that the piece is so thin? Length is 1&15/16" by 1", the thinness is 3/16", and the point is out of the Richards Collection of Jefferson County, Illinois. The point was originally glued on a board--I left the yellowed glue to show just how the piece came to me. The flint I'll describe as 'chert'--and one that may have been heat treated as you notice the red tip with its iron oxides that usually only are seen in heat-treated flints. Note the base seems to have fossil inclusions--there is one blade edge nick that's ancient damage. A small summary--interesting, authentic point that makes classification a challenge--but also very well made. Shipping is $8.00, checks or M.O.s welcomed. Sorry, paypal-type services are not used--Roy A.