Ozwtisgold and PIO Reference, page-32

IMO not just any cong will do. What is needed is the magic combo of MRB underlain by the basal cong over a significant unconformity. The unconformity provides the time gap needed (several hundred MYrs) to erode the source rock and rework and concentrate the nuggets in the shoreline high energy marine environment. All the clues lead to this. A few clues are: Beatons Ck is in younger Hardey Formation cong and is low grade. KAI went looking in conglom overlying MRB (despite what some might have us believe) and found a few colours but no watermelon seeds (their eastern tenement is a much better target). MZN have cong underlying MRB but with no unconformity and despite long term exploration at the Bellary Dome no one has reported watermelon seeds. Watermelon seeds at Purdys, Comet Well and Loudens Patch all have the goods as I believe do HAO. Historical finds of watermelon seeds at Egina and on PIO ground are within cooee of Basal MRB and are likely alluvial deposits relatively recently eroded from the Wits 2 cong. PIO at Kangan IMO will prove to have the Wits 2 source rocks with basal MRB cong with a significant unconformity over the older Cleaverville Formation. There are many claiming to have the right stuff, and no doubt there will be many low grade redeposited cong gold deposits found in younger rocks, but if ya want the ridgey didge Wits 2 Conglomerate with the watermelon seed bed ya need basal MRB cong overlying a significant unconformity.

IMO DYOR

Cheers
BS