Riverstone Intersects 15.88 g/t Au Over 10 Metres at the Kao Deposit

VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 21, 2012) - Riverstone Resources Inc. (TSX VENTURE:RVS)(OTCQX:RVREF)(FRANKFURT:3RV) ("Riverstone" or the "Company") is pleased to report results from eleven diamond drill holes on the 100% owned Kao Deposit, which forms part of the Company's flagship Karma...