[Bonetools] Wave-like cracks in striations

[marinaevora at sapo.pt]

Hello,

   the bones I used were fresh ones.

   regards,
   Marina

Quoting Justin Bradfield <jbradfield8 at gmail.com>:
> Dear Marina and David
>         
>       Many thanks for your helpful suggestions.
>        
>      Marina, were the bones that you worked experimentally old or  
> fresh? Perhaps these wave-like marks are a combination of age and  
> use with a lithic edge...
>       
>     Regards
>      
>    Justin
>
> On 23 August 2015 at 13:15, David Constantine  
> <dkconstantine at btinternet.com> wrote:
>> Hi Justin, 
>>                
>> I would say that they are cracks through age. They are starting  
>> from the cuts/striations as there will be many tiny weak spots  
>> along the length where small chips of bone have flaked away through  
>> manufacture or use. Similar to the way a porthole in a ship would  
>> start to crack at the corners if it they were angled rather than  
>> rounded. 
>>
>>               Regards,
>>
>>               David Constantine
>>
>>
>>                
>> On Sunday, 23 August 2015, 10:18, Justin Bradfield  
>> <jbradfield8 at gmail.com> wrote:
>>
>>                    
>>
>> Dear WBRG                      
>> Can anyone help me identify the cause of these cracks that develop  
>> in striations/cuts on bone (see attachment)?
>>  
>> I've noticed this feature in several archaeological tools but never  
>> in my experimental replications. Could this be a natural property  
>> of aged bone or could a specific contact material be the cause?  
>> I've only ever noticed it in striations. 
>>  
>> Thanks in advance
>>  
>> Justin
>>  
>>  
>>
>>
>>
>>
>>                  _______________________________________________
>>                  Bonetools mailing list
>> Bonetools at listserv.niif.hu
>> https://listserv.niif.hu/mailman/listinfo/bonetools
>>
>>                   
>>
>>
>>
>>
>>
>>
>>            _______________________________________________
>>            Bonetools mailing list
>> Bonetools at listserv.niif.hu
>> https://listserv.niif.hu/mailman/listinfo/bonetools
>>             
>
>
>
>
>
>
>
>
>

 

    Marina Évora

P PLEASE CONSIDER THE IMPACT ON THE ENVIRONMENT BEFORE PRINTING THIS MESSAGE.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://listserv.niif.hu/pipermail/bonetools/attachments/20150826/ad35086b/attachment.html>