[Bonetools] Door hinge?

[glemoine at bowdoin.edu]

If it was a bow drill bearing, I would not expect to see wear in the form of concentric striation on the flattened portion, only in the hole.

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From: Paul Stokes <escoffier1951 at yahoo.co.uk>
Reply-To: "Mailing list for archaeologists of the research group for the study of object and waste of bone, antler. ivory and horn." <bonetools at listserv.niif.hu>
Date: Thursday, April 25, 2019 at 10:28 AM
To: "Mailing list for archaeologists of the research group for the study of object and waste of bone, antler. ivory and horn." <bonetools at listserv.niif.hu>
Subject: Re: [Bonetools] Door hinge?

Hi Josje,

They could be the handle/bearing block of a bow drill.

Regards,

Paul Stokes

On Thursday, 25 April 2019, 13:44:00 BST, Josje van Leeuwen <josje89 at gmail.com> wrote:


Dear all,

This was found in a medieval monastery in Frisia (see attached). It's a bovine metacarpus with a big hole in the centre. Around the hole are concentric friction marks. They cover the proximal side of the bone next to the hole completely. The distal side next to the hole is only partly covered in friction marks. The backside was flattened by cutting, but has no friction marks. Another hole was made in the distal end.
A second one was found in the same dig (but different context), also with a hole in the middle but no friction (see pictures).

Could this be the lower (and perhaps corresponding upper) part of a door hinge? The door could have made the friction marks...
Does anyone know any parallels? Or a different interpretation?

Many thanks in advance and greetings from the Netherlands,

Josje van Leeuwen
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