02158nas a2200217   4500000000100000008004100001653002300042653003000065653001600095653001100111653001100122100001900133700001800152245013800170856005400308300002000362490000700382520152400389022001301913020001401926       2012                            d10aEvent-stratigraphy10aMarine chronostratigraphy10aRadiocarbon10atephra10aTuning1 aWilliam Austin1 aFiona Hibbert00aTracing time in the ocean: A brief review of chronological constraints (60-8 kyr) on North Atlantic marine event-based stratigraphies  uhttp://dx.doi.org/10.1016/j.quascirev.2012.01.015  a28\textendash370 v363 a<p>Well-resolved event-based stratigraphies in marine sediments spanning a significant portion of the last glacial period (60-8 kyr) provide a unique opportunity for time-stratigraphic correlation in the North Atlantic region. Here, we review the current methods available to chronologically constrain these event-based stratigraphies, highlighting, in particular, the value of tephrochronology as an independent tool to validate correlations between records. While the INTIMATE protocols (Lowe et al., 2008; Blockley et al., 2011) are equally applicable to marine and terrestrial records, spatially and temporally variable marine radiocarbon reservoir age effects (MREs) provide a challenge to using marine radiocarbon in the former as an independent chronostratigraphic tool. Despite the inherent uncertainties associated with \textquoterighttuning\textquoteright, we conclude that the mid-points of the common abrupt warming transitions associated with the well-defined, millennial-scale climate oscillations (the Dansgaard-Oeschger (D/O) cycles) observed in the oxygen isotopes of the Greenland ice cores and North Atlantic sea surface temperature (SST) records currently provide the most robust correlation tie-points from which to derive age control. In this invited INTIMATE special issue article we propose a new protocol for establishing marine event-based chronostratigraphies in the North Atlantic region and focus on areas of chronological potential in palaeoceanographic research. ?? 2012 Elsevier Ltd.</p>  a02773791  a0277-3791