It is always tricky to make 3D interpretations of photos.
However it strikes me that the overall pattern is due not to direct erosion of the surface.
Rather it looks as if there was (?is in places) blistering of the surface, and then the breaking down of the blisters to create cavities.
Alternatively, are we looking at deposition of a mineral material, perhaps calcium carbonate or phosphate, over the bone? There is some resemblance in the photo to 'flowstone' of the sort one finds on bones in caves. But the problem with this explanation is why the effect is seen only on this one part of a single bone.
Richard Wright
>
>Subject: [ZOOARCH] damage to articular surface of cattle metacarpal
> From: Sylvia Warman <[log in to unmask]>
> Date: Thu, 24 Apr 2008 16:41:59 +0100
> To: [log in to unmask]
>
>Dear All
>
>
>
>This specimen from an Iron Age pit associated with a roundhouse has
>unusual damage to the proximal articular surface. The grooves don't seem
>parallel enough for rodent gnawing and it doesn't look like any
>pathology I am familiar with.
>
>
>
>The image is at
>http://www.alexandriaarchive.org/icaz/icazForum/viewtopic.php?p=1061#106
>1
>
>
>
>Many thanks
>
>
>
>Sylvia
>
>
>
>Sylvia Warman
>
>Environmental Officer
>
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>Direct Line 01285 772 618
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>Cotswold Archaeology
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>T: 01285 771022
>
>F: 01285 771033
>
>E: [log in to unmask]
><mailto:[log in to unmask]>
>
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><file:///C:\Documents%20and%20Settings\sylvia.warman\users$\sarah.balchi
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><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
>font-family:Arial'>Dear All<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
>font-family:Arial'><o:p> </o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
>font-family:Arial'>This specimen from an Iron Age pit associated with a
>roundhouse has unusual damage to the proximal articular surface. The grooves
>don’t seem parallel enough for rodent gnawing and it doesn’t lo=
>ok
>like any pathology I am familiar with.<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
>font-family:Arial'><o:p> </o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
>font-family:Arial'>The image is at <a
>href=3D"http://www.alexandriaarchive.org/icaz/icazForum/viewtopic.php?p=3D1=
>061#1061">http://www.alexandriaarchive.org/icaz/icazForum/viewtopic.php?p=
>=3D1061#1061</a><o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
>font-family:Arial'><o:p> </o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
>font-family:Arial'>Many thanks <o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
>font-family:Arial'><o:p> </o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
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><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
>font-family:Arial'>Sylvia Warman</span></font><o:p></o:p></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
>0.0pt;
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>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1=
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>
><p class=3DMsoNormal><b><font size=3D1 face=3DArial><span style=3D'font-siz=
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><p class=3DMsoNormal><font size=3D1 face=3DArial><span style=3D'font-size:9=
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