Riverstone Resources Inc.
TSX VENTURE : RVS
FRANKFURT : 3RV

Riverstone Resources Inc.

February 28, 2008 12:04 ET

Riverstone Intersects 5.47 g/t Gold over 10 Metres at Karma

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Feb. 28, 2008) - Riverstone Resources Inc. (TSX VENTURE:RVS)(FRANKFURT:3RV) is pleased to report initial results from the fourth phase of reverse circulation ("RC") drilling recently completed on the Kao Main Zone at its Karma project in Burkina Faso, West Africa. Highlights include 2.75 g/t gold over 22 m (including 5.47 g/t gold over 10 m) and 1.01 g/t gold over 34 m (including 2.00 g/t gold over 12 m). The Kao Main Zone continues to expand to the northwest by at least 100 metres, and it is still open to the north and to the northwest and at depth. Previous drilling in October 2007 had doubled the size of the known near-surface mineralised zone to 600 metres in length by approximately 300 metres in width.

This current phase of RC drilling comprised 5,050 metres in 50 holes, most of which was designed to determine further extensions of the shallow oxide gold mineralization at the Kao Main Zone in preparation for an independent resource estimate.

Significant results from holes 100 to 118 are summarized in the table below. All holes were drilled at -60º. Intervals reported are drilled intercepts, which may not represent true widths of the mineralized zones. Additional results will be released over the next few weeks, once assays have been finalized and verified.



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Hole From To Hole Interval Grade
Number (metres) (metres) (metres) (g/t Au)
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KAO-08-RC-100 8 10 2 2.58
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KAO-08-RC-101 0 2 2 1.69
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KAO-08-RC-108 64 70 6 0.96
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KAO-08-RC-112 28 30 2 1.85
and 48 56 8 0.87
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KAO-08-RC-113 6 40 34 1.01
including 16 28 12 2.00
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KAO-08-RC-114 18 28 10 0.62
and 60 82 22 0.78
including 60 68 8 1.05
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KAO-08-RC-115 32 46 14 0.69
and 52 58 6 1.05
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KAO-08-RC-116 16 36 20 0.86
including 16 24 8 1.07
or including 30 36 6 1.36
and 72 92 20 0.71
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KAO-08-RC-118 0 100 100 0.70
including 0 22 22 2.75
or including 8 18 10 5.47
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The Company is presently drilling on the adjacent Goulagou permit which contains a NI 43-101 compliant indicated resource of 280,000 ounces of gold at a grade of 1.70 g/t and a further inferred resource of 270,000 ounces of gold at a grade of 1.49 g/t (see News Release dated October 11, 2007). Kao and Goulagou are two of the four contiguous exploration permits included in the Company's Karma project, the others being Rambo and Rounga. The Kao Main Zone and Goulagou deposits are approximately 12 kilometres apart, separated by flat terrain. A third Company-owned deposit at Rambo lies essentially midway between the Kao and Goulagou deposits.

Riverstone's strategy is to develop sufficient gold resources at Karma to support a centralized mining operation. Management believes the Company is on track to identify a cumulative gold resource in all categories of more than 1,000,000 ounces of gold at Karma in 2008.

The Company maintains a rigorous quality control program involving the use of repeat assays, check assays at independent labs, inserted blanks, and the use of verifiable standards from an accredited Canadian laboratory. All RC samples were assayed using standard fire assay with atomic absorption techniques, with samples grading in excess of 2.00 g/t gold re-assayed with a gravimetric finish, at the independent Abilab Burkina SARL laboratories in Ouagadougou, Burkina Faso, which is part of the ALS Chemex group.

Riverstone Resources Inc. is active in gold exploration in Burkina Faso, West Africa, where the company holds an extensive portfolio of high quality exploration permits covering 3,500 square kilometres. For further information about the company and its activities, please refer to 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, P.Eng., CEO & President

Paul G. Anderson, P. Geo is a Qualified Person for RVS and has reviewed and approved the contents of this release.

Certain statements made and information contained in this news release and elsewhere constitutes "forward-looking information" within the meaning of the Ontario Securities Act. Forward-looking statements are subject to a variety of risks and uncertainties which could cause actual events or results to differ from those reflected in the forward-looking statements, including, without limitation, risks and uncertainties relating to the interpretation of drill results and the estimation of mineral resources, the geology, grade and continuity of mineral deposits, the possibility that future exploration, development results will not be consistent with the Company's expectations, accidents, equipment breakdowns, title matters and surface access, labour disputes, the potential for delays in exploration activities, the potential for unexpected costs and expenses, commodity price fluctuations, currency fluctuations, failure to obtain adequate financing on a timely basis and other risks and uncertainties, including those described under Risk Factors in each management discussion and analysis. In addition, forward-looking information is based on various assumptions including, without limitation, the expectations and beliefs of management, the assumed long term price of gold, that the Company will receive required permits and access to surface rights, that the Company can access financing, appropriate equipment and sufficient labour and that the political environment within Burkina Faso will continue to support the development of environmentally safe mining projects. Should one or more of these risks and uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described in forward-looking statements. Accordingly, readers are advised not to place undue reliance on forward-looking statements.

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

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