Foraminifera and wood 14C (radiocarbon) in Northeast Pacific for past 30,000 years

Possible flaws in these records include poor age model controls, utilization of mixed, infaunal foraminifera species possibly influenced by changing porewater chemistry, and bioturbation.

We have addressed these concerns using a glacial-interglacial record of epifaunal benthic foraminifera 14C on an ideal sedimentary age model (wood calibrated to atmosphere 14C). Our results affirm – with important caveats – the fidelity of these microfossil archives and confirm previous observations of highly depleted seawater 14C at intermediate depths in the deglacial northeast Pacific