Sorry meant to sign that.
Kath
----- Original Message -----
From: "Kath Hunter" <[log in to unmask]>
To: [log in to unmask]
Sent: Wednesday, 26 February, 2014 4:43:58 PM
Subject: Re: testing the effects of having multiple sievers
Hi,
I am interested to read about the technique used to process your samples. Did you soak the sediment in water prior to processing as this would speed up your processing times per sample considerably. We process 1 litre (or less for borehole samples) and do a total count of all identifiable seeds, Species such as Juncus sp. may be estimated if very numerous and of the same species. We also record the frequency of other remains such as Monocot leaf and stem fragments,charcoal and wood which helps to characterize the deposit. If possible using trained and capable staff is always preferable. It is important that they understand the nature of the remains they are trying to recover and how fragile they are so that they don't blast them against the mesh in abid to complete the sample quickly. There were wet sieving tanks in use in the UK in 1980's which had a tank of water and a sieve on rollers that sat in the top. The operator rocked the sieve back and forth and the wave action in the water broke down the sediment in all but the most clay rich deposits. I don't know if these are still used. They were very large and difficult to transport to site so may have gone out of favour.
----- Original Message -----
From: "Ferran Antolin" <[log in to unmask]>
To: [log in to unmask]
Sent: Wednesday, 26 February, 2014 3:21:39 PM
Subject: testing the effects of having multiple sievers
Dear colleagues,
We are wondering if any of you ever tested the
effects of having several sieving operators working on samples from the
same site and using the same sieving technique (see attachment for an
example coming from our working group). Did anybody try to split one
sample and see if several people produced comparable results? We are
mainly thinking of waterlogged contexts, but any other example would be
useful.
Thank you so much for your collaboration.
Ferran AntolĂn, Bigna Steiner & Stefanie Jacomet
University of Basel
Integrative Prehistory and Scientific Archaeology (IPAS/IPNA)
Spalenring 145
CH-4055 Basel
Switzerland
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