Riverstone Resources Inc.

Riverstone Resources Inc.

June 27, 2005 17:43 ET

Riverstone Resources Inc.: Exploration Work Starts in Burkina Faso


Riverstone Resources Inc. (TSX VENTURE:RVS) is pleased to report that drilling and additional exploration work has commenced on several of its projects in Burkina Faso, West Africa. A minimum of 1,500 metres of reverse circulation drilling will be carried out on the Ligidi Gold Permit and the Rambo Gold Permit. In addition, grid geochemical sampling and reconnaissance geological mapping will be undertaken on the Kao and Yaramoko Permits.

Ligidi Gold Permit

On the Ligidi property, geochemical sampling last fall established an extensive area approximately 13 km long and 3 km wide with gold values in soils generally over 15 ppb. Within this area are several anomalous zones where soil gold values are generally over 50 ppb and as high as 2,600 ppb. The largest of these covers an area approximately 4 km in length and up to 2 km in width. Several other anomalous zones are at least 1 km long and up to 1 km in width. Three specific target areas were identified; the Three Hills zone near the centre of the permit, the Wayalguin zone to the northeast and the Dassoui zone to the southwest. The existence of artisinal gold workings is widespread in the area.

A trench dug across one of the anomalies in the Three Hills area returned two zones of significant gold mineralization:

Zone 1 - 18 metres grading 1.45 g/t gold
Including 10.5 metres at 2.01 g/t gold

Zone 2 - 18 metres grading 1.53 g/t gold
Including 7.5 metres at 2.26 g/t gold

At Wayalguin, a trench dug within the anomaly returned 6.0 metres grading 2.2 g/t gold. Eight drill holes are planned to test the geochemical targets on the Wayalguin and Three Hills prospects.

Rambo Gold Permit

Previous drilling by the Company has identified a gold-bearing shoot within a sulphide-bearing structure. The shoot has an approximate strike length of 150 metres, has an average true thickness of about 11 metres and has been traced by drilling to a depth of 120 metres. The shoot is open for extension to the east and to depth.

Highlights include 12.0 metres grading 7.0 g/t in Hole RA-04-05; 6.0 metres grading 16.4 g/t in Hole RA-04-07; 7.5 metres grading 4.2 g/t in Hole RA-04-04; and 16.5 metres grading 4.5 g/t in Hole RA-04-01. The holes were drilled on fences spaced 50 metres apart over a strike length of 350 metres. The mineralized structure strikes generally east-west and is open in both directions and to depth. At least two holes are planned to test the mineralized zone to depth and along strike.

Kao Gold Permit

The Kao Permit is immediately to the south of and contiguous with the Rambo Permit. Grid soil sampling and reconnaissance mapping and prospecting are planned for the permit. Particular attention will be given to recent artisinal mining activity near the centre of the permit.

Yaramoko Gold Permit

The Yaramoko Permit is in the Hounde greenstone belt in the western part of the country. Grid soil sampling, prospecting and reconnaissance mapping will be carried out on the permit. An established operating artisinal mining site will be sampled and mapped.

The programs are scheduled to be completed by the beginning of August and results will be reported when received.

For further information is available on the Company's website at www.riverstoneresources.com and under the Company's profile at www.sedar.com.

On behalf of the Board,

Michael D. McInnis, President

Michael D. McInnis, P. Eng. is a Qualified Person for RVS and has reviewed and approved the contents of this news release.

The TSX Venture Exchange does not accept responsibility for the adequacy or the accuracy of this release.

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