VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 09/17/12 -- Riverstone Resources Inc. (TSX VENTURE:RVS)(OTCQX:RVREF)(FRANKFURT:3RV) ("Riverstone" or the "Company") is pleased to announce that it has today filed via SEDAR a NI 43-101 compliant Technical Report titled, Preliminary Economic Assessment Report for the Karma Project, Burkina Faso, West Africa, dated effective August 2, 2012 (the "Technical Report"), to support the Preliminary Economic Assessment results announced August 20, 2012 on the Company's flagship Karma Gold Project in Burkina Faso, West Africa. The Technical Report is authored by independent Qualified Persons and is available under the Company's profile at www.sedar.com.

Riverstone is active in Burkina Faso, West Africa, where it holds a portfolio of four high quality exploration projects covering in excess of 2,000 square kilometres. Additional information about the Company and its activities may be found on the Company's website at www.riverstoneresources.com and under the Company's profile at www.sedar.com.

ON BEHALF OF THE BOARD

Dwayne L. Melrose, President & CEO

Paul G. Anderson, M.Sc., P. Geo., the Company's Vice-President, Exploration, is the Company's Qualified Person for the purposes of National Instrument 43-101 and has reviewed and approved the technical contents of this release.