The biostratigraphy of an early Flandrian tufa at Inchrory, Glen Avon, Banffshire.

Tufa information began sometime after c9700 BP when the valley was relatively unshaded except for occasional patches of Betula woodland. An expansion of shade-demanding Mollusca occurs at c400 cm from the top; pollen analyses from these levels indicate the presence of Corylus avellana scrub. A radiocarbon date of 7360+ or -60 BP was obtained from charcoal from a buried soil between 345-350 cm. Above this point there is little change in the composition of the land Mollusca although a pollen from 150 cm indicates that Pinus sylvestris has now become an important forest constituent in the valley. Occurrence of the land snail Vertigo alpestris, known living at only 2 Scottish sites, is noteworthy. Cessation of the tufa formation probably occurred sometime after c6000 BP.-from Authors