C-14 DATING OF TERRESTRIAL MOSS IN TERN LAKE DEPOSITS, ANTARCTICA

Accurate radiocarbon ages were obtained from terrestrial moss from two drill holes in Tern Lake deposits, Antarctica, using liquid scintilla tion counting (LSC) and accelerator mass spectrometry (AMS). The resul ts show that the lake deposits have been accumulating since the end of the last glacial epoch ca. 12,600 cal BP at the rate of 0.13-1.1 mm a (-1). We discuss the validity of C-14 ages of Antarctic lake deposits, with respect to the latitude effect of C-14 productivity, the reservo ir effect, the environment effect and the hard-water effect.