<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:13px"><div id="yui_3_16_0_1_1440313193942_6518"><span>Hi Justin, <br><br></span></div><div id="yui_3_16_0_1_1440313193942_6518"><span id="yui_3_16_0_1_1440313193942_6520">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 class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" 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 dir="ltr"> <font size="2" face="Arial"> On Sunday, 23 August 2015, 10:18, Justin Bradfield <jbradfield8@gmail.com> wrote:<br> </font> </div> <br><br> <div class="y_msg_container"><div id="yiv2348347132"><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>_______________________________________________<br>Bonetools mailing list<br><a ymailto="mailto:Bonetools@listserv.niif.hu" href="mailto:Bonetools@listserv.niif.hu">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></body></html>