Street-Perrott, F. A.,; Hales, P. E.; Perrott, R. A.; Fontes, J. Ch.; Switsur, V.R.; Pearson, Andrew G.
Author Affiliation, Ana.
Basic Medical Sciences (Anatomy, Biochemistry, Physiology); Faculty of Medical Sciences
Late Quaternary palaeolimnology of a tropical marl lake: Wallywash Great Pond, Jamaica
Journal of Paleolimnology
Date of Publication
Wallywash Great Pond is the largest perennial lake in Jamaica. It occupies a fault trough within the karstic White Limestone and is a hardwater lake, the chemistry of which is strongly influenced by the spring discharge from the limestone. In 1984, a 9.23 m-long sediment core (WGP2), with a basal age of about 120 000 years, was taken from a water depth of 2.8 m. WGP2 was analysed for magnetic susceptibility, loss-on-ignition (LOI), carbonate, mole % MgCO3 in calcite, and stable isotopes in the fine carbonate fraction. The stratigraphy of core WGP2 is described, and the results of stable-isotope determinations on carbonate, together with measurements of bulk-sediment properties, e.g. LOI, carbonate content and magnetic susceptibility (c), are used to reconstruct the palaeolimnology of the lake during the Late Quaternary. The sediments were dated using radiocarbon and uranium-thorium methods. The limnology of the modern lake is used as a basis for the interpretation of the core material....