92 samples of oak trunks and 7 samples of other tree species (poplar, elm, maple, beech) were taken from selected sites.
Minimum sample sizes are intended for well preserved, clean material.
If the sample is too small, it will be submitted for direct combustion. *Ultrafiltration is used to concentrate longer protein molecules and can be used to remove shorter chain proteins more likely to originate from contaminants.
Macrofossils include charcoal, wood, plant, bone, shell, and seeds – not rootlets.
We recommend isolating macrofossils with tweezers or by sieving in distilled, deionized water. Macrofossils (except shell) will undergo the standard AAA pretreatment.
Peat can be analyzed as either selected macrofossils or as bulk material.
If shipping macrofossils, we recommend they be rinsed in deionised, distilled or ultra-pure (Milli-Q) water to remove residual sediment.
Please consult with us prior to sending wood samples that have been treated with shellac, oil, glue, etc.
In many lacustrine environments, macrofossils are the preferred organic fraction used for dating.
Charcoal samples should be picked out, floated, or sieved from any accompanying sediment.