Ac cel er a tor mass spec trom e try (AMS) 14 C dates, pol len and plant macrofossil ev i dence and lithostratigraphic pa ram e ters ob tained from four Late Gla cial lake sed i ment re cords were used to study the deglaciation chro nol ogy of Es to nia. AMS dates show that the north ern part of the Saadjärv Drum lin Field was free of ice cover at ap prox i mately 14,300-14,200 cal yr BP. These ages fit well with the ice re treat es tima tions (14,700-14,500 cal yr BP) of the Otepää ice-mar ginal zone in the south and the deglaciation of the Pandivere Up land in the north (13,800 cal yr BP). Glaciolacustrine sed i ments of the Haljala and Udriku bas ins were de pos ited in proglacial lake A 1 , a north east ern bay of the Bal tic Ice Lake that al ready ex isted ca. 13,800 cal yr BP. The Palivere ice-mar ginal zone, and proglacial lake A 2 as so ci ated with it, was formed ca. 500 years later, at ap prox i mately 13,200 cal yr BP. New ev i dence in di cates that ice re advance dur ing the Palivere stade ter mi nated dur ing the AllerÝd chronozone.Leili Saarse, Atko Heinsalu and Siim Veski, In sti tute of Ge ol ogy at Tallinn Uni ver sity of Tech nol ogy, Ehitajate tee 5, 19086 Tallinn, Esto nia;