[en] Uranium mineralisation in the pyritiferous oligomictic quartz-pebble conglomerate (QPC), overlying the Archaean basement and underlying the Neoarchaean/Palaeoproterozoic metasedimentary (igneous) sequence, constitutes one of the important types of uranium deposits, as in Canada (Blind River) and South Africa (Witwatersand). Consequent to the reporting in 1973 of uranium mineralisation in the form of uraninite in such QPC from Chickmagalur at the base of the Bababudan Group, the Atomic Minerals Directorate for Exploration and Research (AMD) had intensified exploration for QPC type uranium mineralisation in different parts of Karnataka. As a result, over 30 occurrences or similar QPC were identified in the nine schist belts, viz., Bababudan, Western Ghat, Shimoga, Chitradurga, Chikkanaikanahalli, Nagamangala, Holenarsipur, Sigegudda and Sandur. Out of these, in four areas viz., Chikmagalur, Walkunji, Yelakki and Ananthawadi, detailed exploration for uranium, including geological mapping, contouring and exploratory drilling for a total of 16.6 km was carried out from mid 1970's to late 1980's. The general characteristics of 30 QPC occurrences in Karnataka in terms of their stratigraphic position in different schist belts, geological setting, some sedimentological features and uranium mineralisation as well as highlights of detailed exploration in the above cited four areas and reasons for discontinuing exploration in these are summarised in this paper. (author)