Variación de la vegetación holocena (4300-280 B.P.) de Cantabria a traves del análisis polínico de la turbera del Alsa

Abstract

This paper describes the palinological study carried out in a peat deposit in Bárcena Pie de Concha (Cantabria, Spain). A 2,6 m. profile was obtained and 24 samples were studied. Three samples were also dated by 14C. and the ages were also determined (4310 to 280 years B.P.). The data obtained shows that the peat was formed between the Atlantic and the Subboreal, the Subatlantique periods appear well defined in the diagrams. Three phases have been distinguished in the microflora. A inferior section of the profile, characterized by the predominance of Pinus sp. pollen; a second or middle section in which pollen belonging to caducifolium trees, Betula sp. and Corylus avellana, and third or superior section which in characterized by an increase of herbaceous plants, like Ericaceae.