01600nas a2200145   4500008004100000022001400041245007600055210006900131300001400200490000700214520113700221100001901358700001901377856005801396       2012                        eng d  a0008-407700aTree macrofossils of Younger Dryas age from Cohoes, New York State, USA0 aTree macrofossils of Younger Dryas age from Cohoes New York Stat  a671 - 6800 v493 a<p>Tree macrofossils dating from the middle to end (about 1000 years, ca. 12 600–11 600 cal years BP) of the Younger Dryas chronozone were found in an organic deposit on the southwest side of the Mohawk River, near its junction with the Hudson River in Cohoes, New York, USA. The fossils included substantial wood fragments, associated plant remains, and pollen, which indicate a forest of white spruce (Picea glauca), balsam fir (Abies balsamea), and tamarack (Larix laricina). The presence of white, rather than black (P. mariana) or red (P. rubens) spruce in the Younger Dryas was probably due to a riparian-type environment, confirmed by its location and American beaver tooth marks on some of the wood fragments. The clusters of wood radiocarbon dates indicate periodic changes in erosion and deposition at the site. One possible but very short decline (temperature reversal?) may be indicated by tree-ring growth, but in general, the ring widths of the trees and their growth responses suggest variable but slowly improving conditions over time, possibly from warming temperatures, before the end of the Younger Dryas.</p>
1 aMiller, N., G.1 aGriggs, C., B.  uhttp://www.nrcresearchpress.com/doi/10.1139/e2012-010