Riverstone Resources Inc.

Riverstone Resources Inc.

June 04, 2007 10:30 ET

Riverstone Discovers New Gold Zone on Kao

VANCOUVER, BRITISH COLUMBIA--(Marketwire - June 4, 2007) - Riverstone Resources Inc. (the "Company") (TSX VENTURE:RVS) is pleased to announce the discovery of a new gold zone on the Kao property in Burkina Faso, West Africa. The new discovery is located approximately 4.5 kilometres northeast of the Kao Main Zone, which returned excellent results from the Company's Reverse Circulation ("RC") drilling program in March 2007. Significant surface samples collected from the new zone returned values ranging from 1.35 g/t gold to 28.8 g/t gold. The new discovery appreciably increases the potential of the Kao property and the Company is planning an aggressive drilling program to further test both of these attractive gold zones.

The surface samples were collected from an area of artisanal gold workings that occur within a broad gold-in-soil anomaly. Samples were collected from quartz veins and mineralized wallrock over an area approximately 900 metres by 700 metres. Assays that exceed 1.0 g/t gold are reported below:

Type of Sample Grade (g/t gold)
Grab 1.43
Grab 1.35
Grab 13.7
Grab 28.8
Grab 1.25
Grab 5.97
Grab 1.42
Grab 2.59
Grab 1.01

The new zone appears to have the same northerly trend as the gold zones 4.5 kilometres to the south. The Main Zone was tested in March 2007 with a RC drilling program, which confirmed the presence of multiple, parallel gold zones. Both zones are open for extension in all directions. Significant results from the drilling program were reported in News Releases dated April 4th and 16th, 2007, and are summarized below:

Hole Results
KAO-07-RC-001 1.20 g/t gold over 8m
and 1.08 g/t gold over 6m
KAO-07-RC-002 1.52 g/t gold over 4m
and 1.69 g/t gold over 12m
KAO-07-RC-004 1.36 g/t gold over 24m
and 1.26 g/t gold over 10m
KAO-07-RC-006 1.22 g/t gold over 30m
KAO-07-RC-007 1.26 g/t gold over 8m
KAO-07-RC-008 21.46 g/t gold over 2m
KAO-07-RC-012 3.55 g/t gold over 10m
and 1.05 g/t gold over 6m
KAO-07-RC-014 2.83 g/t gold over 2m
and 1.03 g/t gold over 12m
and 1.90 g/t gold over 2m
KAO-07-RC-016 2.20 g/t gold over 8m
KAO-07-RC-017 1.01 g/t gold over 2m
and 6.77 g/t gold over 4m
KAO-07-RC-019 1.07 g/t gold over 8m
and 1.18 g/t gold over 2m

The Company maintains a rigorous quality control program involving the use of repeat assays, check assays at independent labs, and the use of verifiable blanks and standards from an accredited Canadian lab. All RC samples were assayed using standard fire assay with atomic absorption techniques, at the independent Abilab Burkina SARL laboratories in Ouagadougou, Burkina Faso, which is part of the ALS Chemex group.

For further information about the Company and its activities in Burkina Faso, please refer to the Company's website at www.riverstoneresources.com and on www.sedar.com.


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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