Charnockite-Quartzite Association in the Rangala-Madulkele Area, Ceylon

Basic charnockites several feet thick and completely contained in quartzites of the Khondalite Series are common in the Rangala-Madulkele area of Ceylon. Recently however, extremely Darrow bands of basic charnockites, 1/3 to 1 1/2 inches thick, in quartzite, have been noted. The nature of the field occurrence and the petrographic characteristics of these locks are described. It is concluded that the significant features of these occurrences can be best explained on the assumption that the basic charnockites, at least in this area, are the metamorphosed equivalents of sediments which formed part of the Khondalite Series.