Clovish preform 1:10

[aaron]

I posted this piece a few days ago under "massive overshot..)". That overshot took the piece from 1:6 (width to thickness ratio) to 1:8. So I looked in the book "The Fenn Cache" and realised that the preforms in there are about 1:8, ( but the finished points are more like 1:4.7 averege). In the process of working the biface down I "overdid it" a bit and ended up at 1:10 (!).This is my thinnest ratio ever (pats self on back).
Question- when y'all are building a clovis, how does the W:T of your preform compare to your finished piece? On mine, I usually keep the w:t fairly constant through the process. But the realisation that the fenn cache preforms (if that's what they are) are much thinner in W:T than the finished points, makes me wonder if thin preforms are the way to go.

[aaron]

It's Riley Dacite (Oregon) and 4 3/4 wide (12cm:12mm). Moose and elk percussion with a few pressure flakes .

[Timo]

Aaron, I wished I had an answer for ya, but frankly I never really thought about it?

I think that most of my bifaces are thinner( ratio wise) that my preforms, and after I get it to preform size, then  I  know that I am getting closed to done,so the point usually winds up close to the same ration as my preform. I need to watch this next time I build some and see how it holds up.

Good looking Dacite. I never get to hit that stuff much. It does make some awesome looking Paleo stuff.

[jamie]

arron some of the clovis points like the fenn cache are very thin like you said. most average 3/1 ratio thoughive just got back into cumberlands again and those are 2/1 ratio. getting a good ridge line set ,even on the thin ones, will get that flute to travel.