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Author Topic: Turtle Backs  (Read 6325 times)

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Offline bushman

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Turtle Backs
« on: July 31, 2011, 08:30:18 pm »
How do you guys go about removing a turtle back?
Bushman
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Offline Tower

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Re: Turtle Backs
« Reply #1 on: July 31, 2011, 10:39:17 pm »
I remove mass from both sides with percussion & then prepare a platform & remove the remaining percussion bulb. Repeat if necessary. That's how I do it. Others may use another method.
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Offline madcrow

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Re: Turtle Backs
« Reply #2 on: July 31, 2011, 10:49:58 pm »
I work it from the ends, or where the natural ridges of the rock are.  It is easier to follow those ridges, than to run removal flakes through them. well, it works for me anyway.
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Offline Timo

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Re: Turtle Backs
« Reply #3 on: July 31, 2011, 11:10:34 pm »
The problem I had (with turtles) when i was first starting was worrying about loosing material. nowadays when I have one of them  I just go at it. Don't be afraid to sacrifice some length or width to set up a good strong angle and hit it high on the margin to remove mass as quickly as you can.

All good advice above.
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Offline triggerfinger

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Re: Turtle Backs
« Reply #4 on: August 01, 2011, 12:29:04 am »
so.....whats a turtle back
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Offline Tower

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Re: Turtle Backs
« Reply #5 on: August 01, 2011, 12:35:55 am »
Guessing the percussion bulb from the spall flake?
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Offline iowabow

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Re: Turtle Backs
« Reply #6 on: August 01, 2011, 02:07:37 am »
I was thinking it looked like this. This is an artifact found on a farm nearby. 
« Last Edit: August 01, 2011, 02:14:19 am by iowabow »
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Offline iowabow

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Re: Turtle Backs
« Reply #7 on: August 01, 2011, 02:15:58 am »
I think the platform on the right failed and maybe they gave up.
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Offline Tower

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Re: Turtle Backs
« Reply #8 on: August 01, 2011, 02:18:59 am »
What the h{\\ is that thing! Guess I need to get out of the house more often.
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Offline iowabow

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Re: Turtle Backs
« Reply #9 on: August 01, 2011, 02:21:12 am »
I show you more photo in 4 minutes
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Offline iowabow

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Re: Turtle Backs
« Reply #10 on: August 01, 2011, 02:26:56 am »



« Last Edit: August 01, 2011, 02:34:02 am by iowabow »
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Offline Tower

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Re: Turtle Backs
« Reply #11 on: August 01, 2011, 02:37:02 am »
Is it a failed attempt by one of our knapping forefathers?  Or a tool fashioned from a percussion bulb by one of the ancients? Can't really tell.
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Offline iowabow

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Re: Turtle Backs
« Reply #12 on: August 01, 2011, 03:31:58 am »
Sure could be.  Do you think this is what they mean when they say "turtle back".
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Offline Timo

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Re: Turtle Backs
« Reply #13 on: August 01, 2011, 08:30:15 am »
that is pretty much a turtle back. Usually flat on one side and the other side very pronounced.   Normally in smaller rocks. They get pitched to the side alot. They can be a handful to deal with.
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Offline bushman

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Re: Turtle Backs
« Reply #14 on: August 01, 2011, 03:36:09 pm »
How would you guys go about removing flakes from the hump side of a rock or spall like is in the pictures that iowabow posted (Thanks iowabow for the pictures, that’s what I was talking about, just didn’t have any pictures to show it that good.) How do you set up your platforms, extra? If you get a flake that is a turtle back is there any way to remove it and still make a point out of it? Every time I try it all I get is a smaller turtle back, or end up with a bird point. Thanks
Bushman
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