Abstract
A number of recent studies have focussed upon identification of charophyte oospores in an attempt to identify their colonisation and development within lakes, some of which span many thousands of years. Since charophytes are confined to clear waters, their presence also provides information on lake clarity and in some cases, trophic status. In this study we analysed a long piston core taken from the centre of Malham Tarn for charophyte remains and report on the findings in this short article.