Primitive Archer

Main Discussion Area => Flintknapping => Topic started by: Knapper on September 09, 2013, 11:59:14 am

Title: Whats This
Post by: Knapper on September 09, 2013, 11:59:14 am

Deerhunter and myself went rock hunting and found this. Now its from SE Oklahoma. Allan has some local points he's found made from this. Its actually a little coarse and is hard to work but is possible. Haven't tried to heat treat it yet. We did find some a little glassy though. Can anyone ID?
Knapper

Title: Re: Whats This
Post by: chief deer on September 09, 2013, 12:09:01 pm

Pretty sure it is John's Valley Chert. Mike

Title: Re: Whats This
Post by: Knapper on September 09, 2013, 02:22:51 pm

Does it heat treat well, Chief deer?
Knapper

Title: Re: Whats This
Post by: cowboy on September 09, 2013, 11:03:08 pm

Don't have a clue but cool looking rock.

Title: Re: Whats This
Post by: JackCrafty on September 10, 2013, 01:31:15 pm

Looks like rhyolite.  If it is, it won't respond to heat.  Try the heat anyway.

Cook at 200 degrees for 24 hours then crank it up to 400 for 4 hours.  Let cool for 12 hours then take it out and bang on it.  If it has improved, you got yourself some good ol' chert.   :)

Title: Re: Whats This
Post by: Knapper on September 10, 2013, 03:26:33 pm

Thanks Patrick, As soon as I get the floor back in my shop that's what ill do
Knapper

Title: Re: Whats This
Post by: chief deer on September 10, 2013, 06:52:17 pm

Don't know if Ryolite is in SE OKLA but Johns Valley is around the Talahina drive. Not sure if it improves with heat or not. I have worked a little and it was raw, The good stuff chips pretty good. Looks like what you chipped worked pretty good. Mike

Title: Re: Whats This
Post by: mullet on September 10, 2013, 07:03:46 pm

If it's Ryolite it will help to heat it, but at a high temperature. James Parker has been doing it.

Title: Re: Whats This
Post by: caveman2533 on September 10, 2013, 09:35:40 pm

Looks like Rhyolite to me.

http://digital.library.okstate.edu/OAS/oas_pdf/v39/p124_126.pdf

Title: Re: Whats This
Post by: Knapper on September 11, 2013, 10:36:29 am

Mullet,
    My first heat treat session will be at the 400 range, if there is no change at what temp is Mr. Parker working at 6 to 8?
Knapper

Title: Re: Whats This
Post by: YosemiteBen on September 11, 2013, 02:12:16 pm

whatever it is it is purty!

Title: Re: Whats This
Post by: mullet on September 11, 2013, 06:15:27 pm

I think when James was telling me about ithe was heating it in the 800 range.

Title: Re: Whats This
Post by: AncientArcher76 on September 12, 2013, 03:31:51 am

Looks like some tough NY stone...but good job on it.  Let us know how the heat treating goes!

Russ