Industrydating com

Uncali-brated 14 C ages are expressed here with the suffix ‘‘bpuncal.’’ (before present uncalibrated), whereas cali-brated ages are designated BP, BC, or AD ‘‘cal.’’(calibrated).

In the text that follows we employ, a priori, thefollowing conventions for the subdivision of the late Quaternary, which are based primarily on the climatephases described by Maxwell and Liu (2002).

industrydating com-55industrydating com-73

The preparation of sediments for microfossil analysisfollowed standard procedures: Berglund and Ralska-Jasiewiczowa (1986)with respect to pollen preparation; Stockmarr (1971)with respect to microscopic charcoalparticle concentrations; Piperno (1998)with respect tophytolith preparation.As a non-karstic lake with no currentsettlements on its shores (the lake is located in a naturereserve), NTSH was the only lake suitable for coringidentified in the vicinity of the prehistoric cave sites.Thesize of the lake and the lack of fluvial throughput meanthat pollen deposition is likely to reflect local rather thanregional vegetation, in contrast to larger lakes to thenorth and northwest (see below).The pollen record published by Maloney (1999a,b)begins at 155cm during the Pleistocene/Holocenetransition (from approximately 10,600bp uncal.). NTSH phytolith dataand analyses are published in Kealhofer (2002, 2003).The NTSH phytolith data reveal that the lowestvalues of arboreal indicators and the highest values of burnt phytoliths (here taken to be an indication of fireactivity within the NTSH catchment) occurred duringthe late glacial period (Fig.

Leave a Reply