01407nas a2200169   4500008004100000245013600041210006900177300001200246490000700258520081300265653001501078653003101093653003201124653002501156100001701181856003901198       2014                        eng d00aA Model for Calculating Freshwater Reservoir Offsets on AMS-Dated Charred, Encrusted Cooking Residues Formed from Varying Resources0 aModel for Calculating Freshwater Reservoir Offsets on AMSDated C  a981-9890 v563 a<p>The freshwater reservoir effect (FRE) hypothesis suggests that ancient carbon from aquatic organisms incorporated into AMS-dated charred, encrusted cooking residues on interior pottery walls produces old apparent radiocarbon ages. This hypothesis has been used primarily in northern European final Mesolithic contexts to explain 14C ages on cooking residues that are thought to be too old relative to 14C ages obtained on terrestrial samples, resulting in so-called freshwater reservoir offsets (FROs). More recently, the hypothesis has been cited in interpretations of 14C ages from residues in the North American Plains and elsewhere. This article presents a model using an Excel spreadsheet that allows calculation of FROs with varying inputs of dead carbon and aquatic and terrestrial resources.</p>
10aAMS dating10aencrusted cooking residues10aFreshwater Reservoir Effect10aradiocarbon modeling1 aHart, J., P.  uhttp://dx.doi.org/10.2458/56.17558