<div dir="ltr"><div>Hello All, </div><div> </div><div>On the excavation site of Nahal Mahanayim (NMO) in Israel, we have the problem of "active waterlogging" - the site is next to the Jordan river, so water keeps coming up from below as the excavation proceeds. There are some very interesting bone finds, but they become waterlogged as they are exposed. From damp (in the ground) to wet (half-excavated, but not lifted out yet), with existing cracks and weaknesses, this creates a difficult situation for consolidation or for block-lifting. </div>
<div> </div><div>We are trying several different ideas to see if we can work out a suitable protocol for this situation, but it will be good to learn from you, NHCOLL readers, of your ideas on suitable consolidands or casting materials (to create "shells" on barrier layers) suitable for conditions where water keeps coming in so that levels keep rising, even with people bailing out water. Consolidants not only need to work in damp conditions, they also need not to disintegrate as waterlogging occurs and to set under wet conditions. Same thing goes for any "casting" materials. </div>
<div> </div><div>The attached image gives a pretty good example of the situation. </div><div> </div><div>Thank you for your comments and thoughts!</div><div> </div><div>Gali<br clear="all"><br>-- <br></div><div dir="ltr">
<div><font face="Tahoma">Gali Beiner (ACR)</font></div><div><font color="#000080" face="tahoma">Conservator, Palaeontology
Lab</font></div><div><font><font face="Arial"><font color="#000080">National Natural History
Collections</font></font></font></div><div><font><font face="Arial"><font color="#000080">The Hebrew University of
Jerusalem <br>Berman Building, Edmond J. Safra campus, Givat Ram<br>Jerusalem
91904, Israel<br>Fax. 972-2-6585785</font></font></font><font><font face="Arial"><font color="#000080"><br></font><u><font color="#0000ff"><span style="color:blue;font-family:Arial;font-size:10pt"><a title="blocked::mailto:rivka@vms.huji.ac.il" href="mailto:gali.beiner@mail.huji.ac.il" target="_blank">gali.beiner@mail.huji.ac.il</a></span></font></u></font></font></div>
<p>
<font face="tahoma">Have a look at our <a href="http://nnhc.huji.ac.il" target="_blank">National Natural History Collections </a>Website!</font></p></div>
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