<div dir="ltr"><div><div><div><div>Dear Marina and David<br><br></div>Many thanks for your helpful suggestions. <br><br></div>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...<br><br></div>Regards<br><br></div>Justin<br><div><div><div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On 23 August 2015 at 13:15, David Constantine <span dir="ltr"><<a href="mailto:dkconstantine@btinternet.com" target="_blank">dkconstantine@btinternet.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif;font-size:13px"><div><span>Hi Justin, <br><br></span></div><div><span>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. <br><br>Regards,<br><br>David Constantine</span></div> <br><div><br><br></div><div style="display:block"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif;font-size:13px"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif;font-size:16px"><div><div> <div dir="ltr"> <font face="Arial" size="2"> On Sunday, 23 August 2015, 10:18, Justin Bradfield <<a href="mailto:jbradfield8@gmail.com" target="_blank">jbradfield8@gmail.com</a>> wrote:<br> </font> </div> <br><br> </div></div><div><div><div><div><div dir="ltr">Dear WBRG<div><br></div><div>Can anyone help me identify the cause of these cracks that develop in striations/cuts on bone (see attachment)?</div><div><br></div><div>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. </div><div><br></div><div>Thanks in advance</div><div><br></div><div>Justin</div><div><br></div><div><br></div></div></div><br></div></div>_______________________________________________<br>Bonetools mailing list<br><a href="mailto:Bonetools@listserv.niif.hu" target="_blank">Bonetools@listserv.niif.hu</a><br><a href="https://listserv.niif.hu/mailman/listinfo/bonetools" target="_blank">https://listserv.niif.hu/mailman/listinfo/bonetools</a><br><br><br></div> </div> </div> </div></div></div><br>_______________________________________________<br>
Bonetools mailing list<br>
<a href="mailto:Bonetools@listserv.niif.hu" target="_blank">Bonetools@listserv.niif.hu</a><br>
<a href="https://listserv.niif.hu/mailman/listinfo/bonetools" rel="noreferrer" target="_blank">https://listserv.niif.hu/mailman/listinfo/bonetools</a><br>
<br></blockquote></div><br></div></div></div></div></div></div></div>