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Pb against depth or cumulative weight (to allow for compacting) will be a straight line if the sedimentation rate has been constant.
Least squares regression is used to determine the slope of the decay curve, from which the sedimentation rate can be calculated.
– Sediments are complex systems containing carbon of multiple forms, sizes ranges and sources.
Please contact us to discuss the nature of your research objective to ensure the most appropriate pretreatment of your sediment sample.
– If the macrofossils are chosen for the analysis, the reported results will be as “plant material”.
In some cases, it is wise to date both separately to see if the macrofossils or sediment is yielding the best (most reliable) date.
paleobotanist for plants, forensic archaeologist for bones, or paleontologists for shells.
Generally, it is better to date the macrofossils present than the sediment due to the possible contaminants in the latter.
You are welcome to contact us to discuss the pretreatment or request that we contact you after the pretreatment to discuss options for radiocarbon dating. However, knowing the dry weight will better allow you to estimate the amount of material to send.
If you want to dry your samples, heating at 90°C to 100°C for 4-24 hours is recommended.