Microfossil sequences in Ilponlampi, a small lake in northern Russian Karelia

HUTTUNEN, ANTTI; HUTTUNEN, RAIJA-LIISA; EKMAN, ILPO; ESKONEN, KRISTIINA; KOUTANIEMI, LEO and VASARI. YRJÖ 1994. Microfossil sequences in Ilponlampi, a small lake in northern Russian Karelia. Bull. Geol. Soc. Finland 66, Part 2, 67-80. The Holocene history of Ilponlampi, a small lake situated in northwestern Russian Karelia, is presented based on pollen, diatom, charred particle and botanical macroremain analyses. Four 14-C dates for the sequence show that it reaches back almost to the beginning of the Holocene. The immigration of the various tree species took place somewhat earlier than further west. A natural acidification process is characteristic of the lake, which seems to have remained practically unaffected by any human influence.