Analysis of information sources in references of the Wikipedia article "Occurrence of thorium" in English language version.
according to studies done by scientists in a geological survey, Sri Lanka has sizeable deposits of thorium, but they have not been properly assessed.
Scientists have found the existence of huge aquatic resources including uranium, thorium, and clay in the Bay of Bengal. According to Ministry of Power, Energy and Mineral Resources, uranium and thorium were found in the deep sea while clay in shallow waters.