Bulletin de l'Association française pour l'étude du quaternaire - Année 1987 - Volume 24 - Numéro 1 - Pages 49-61The Narse d'Ampoix mire lies in an ancient maar formed during the Lateglacial. The pollenanalysis of a boring made in its center shows that the sedimentary filling started during a cold period characterised by a treeless steppe vegetation corresponding to the Younger Dryas. The Holocene vegetational history is very similar to that described in the near mountains of Cezallier and Cantal. It is marked by the existence of a local Pinus woodstand during the Preboreal, by the dominant role of Tiha during the Atlantic and by the low representation of Abies during the Subboreal Fagus phase. There is a little evidence for an early human action during the first part of the Atlantic. This site is of interest also because Juvigné et Gewelt (1986) found in it 6 tephra layers; through comparision with the regional vegetational history, the pollenanalysis of this site made it possible, along with I4C datings, to verify the dates proposed for the volcanic episodes. Moreover, various modern methods of pollen data processing were used for the study of the Narse d'Ampoix mise, namely two basic computer programs for the zonation of biostratigraphic data. L'analyse pollinique de la Narse d'Ampoix (alt. 1015 m) a donné l'occasion d'appliquer et de discuter diverses méthodes de traitement des données. Cette étude, tout en précisant l'histoire de la végétation depuis le Tardiglaciaire dans un secteur encore peu étudié du Puy de Dôme, contribue à la datation des six lits de tephra inclus dans le remplissage de cet ancien lac de maar. 13 pages Source : Persée ; Ministère de la jeunesse, de l’éducation nationale et de la recherche, Direction de l’enseignement supérieur, Sous-direction des bibliothèques et de la documentation.