Sedimentology and Clay Mineralogy of Blanket Deposit in Horton Plains

Occurrences and characteristics of Sri Lankan surficial deposits have been studied intensively (Cooray, 1984; Dahanayake et al., 1985). The Palaeoecological approach, extended to analyse surficial deposits, facilitates discovering of palaeo-climatic conditions. Perhaps it could be used to build up constructing models of reoccurrence of similar events (Premathilake and Risberg, 2003). Varve-like depositional sequences associated with disc shaped striated pentagonal pebbles have been recorded in Wauda sediments in Sri Lanka. These sediments are dated back to Permocarboniferous period and originated by glacial process as an exception to the quaternary surficial deposits (Dahanayake and Dassanayake, 1981).