Mr. Dwayne Melrose reports

RIVERSTONE PROVIDES DETAILS OF POTENTIAL KAO DEPOSIT EXPANSION

Riverstone Resources Inc. has provided details of the potential expansion of its Kao deposit since the most recent resource estimate. The 100-per-cent-owned Kao deposit is part of the company's Karma project which comprises a National Instrument 43-101-compliant in-pit Whittle-indicated resource of 1.6 million ounces of gold in 47.3 million tonnes grading 1.1 grams per tonne gold and an inferred resource of 600,000 ounces of gold in 18.9 million tonnes grading 0.93 gram per tonne gold (see news release dated Jan. 9, 2012, and National Instrument 43-101 technical report titled, "Technical Report and Resource Estimate on the Karma Project, Burkina Faso, West Africa," filed on SEDAR on Feb. 23, 2012).

Subsequent to the resource estimate, to date an additional 54,616 metres of drilling in 293 holes have been completed at Kao. This includes 32,993 metres in 147 diamond core holes and 21,623 metres in 146 reverse circulation holes.

The postresource drilling at Kao has included several different phases:

1. Within the present resource area, a number of deeper holes, dominantly DD holes, have been drilled to further extend the mineralization below the limits of the previous drilling included in the Jan. 9 resource model.
2. Several DD holes have extended the deeper zones down dip to the east.
3. Based on reported results and visual examination of the drilling the mineralization has been extended approximately 350 metres to the north along strike.
4. Based on reported results and visual examination of the drilling the mineralization has been extended between 200 and 350 metres along strike to the south. Of special interest is where recent drilling has occurrences of visible gold in drill cuttings, suggesting the emergence of a new zone of mineralization.
5. In addition, there are several widely scattered RC holes to the north and west of the deposit, both historical and recent. Some of these holes have significant gold mineralized intersections. Follow-up of these drill intersections is within the long-term drill plan for Kao.

A map posted on the company's website shows details of the potential expansion of the mineralization of the Kao deposit. These drill holes completed at Kao and also the drilling completed at GGI and GGII (plus 85,000 metres in total) will be included in an updated resource estimate which is scheduled to be completed in September, 2012.

"We are most encouraged by the drill results that have been released to date and the potential for the overall expansion of the Kao deposit," commented Dwayne L. Melrose, president and chief executive officer of Riverstone. "We still have not found the limits of the Kao deposit along strike in both directions and also down dip and our ongoing work continues to expand the deposit. Results of recent drilling will be included in the upcoming resource estimate scheduled for September, 2012. The preliminary economic assessment for the entire Karma project is progressing on schedule and is expected to be released in August, 2012."

Dr. Giles R. Peatfield, PhD, PEng, is the qualified person for Riverstone Resources, and has reviewed and approved the contents of this release.

We seek Safe Harbor.