Rodinia Minerals Inc. Reports Phase II Sample Results at Diablillos With Brines Up to 1000 mg/L Lithium and 11000 mg/L Potassium

TORONTO, ONTARIO--(Marketwire - April 20, 2010) - Rodinia Minerals Inc. ("Rodinia" or the "Company") (TSX VENTURE:RM)(OTCQX:RDNAF), is pleased to report that it has received positive phase II sample results from its auger drill exploration program on its Salar de Diablillos lithium-brine project in Salta, Argentina ("Diablillos"). The Company believes the phase II results may be indicative of high concentrations of lithium and potash, and are encouraged to see results that exceed the initial sample results (see Press Release dated March 1, 2010). The phase II sample results were taken at depths between 3 and 5 metres below surface, whereas the previously reported results were taken between 1 and 3 metres below surface.

Results from the phase II sampling of brines have returned lithium ("Li") values of up to 1,000 milligrams per litre ("mg/L") and favourable magnesium ("Mg") to lithium ratios. The samples, all taken from within aquifers on the Diablillos property, averaged 895 mg/L Li with ratios of 4.44 Mg:Li, and 5.22 SO4:Li. These samples are from the aquifer that will be the focus of subsequent exploration programs and will be used to assess the feasibility of production in the future. The results represent the first batch of deep auger drilling samples currently being performed on a 300 metre by 300 metre grid over the Diablillos project. The Company expects more results over the next few months. The results from phase II aquifer sampling are summarized in the table and figure below.















To view Figure 1, please visit the following link: http://media3.marketwire.com/docs/RM420f1.pdf

The Company continues to employ a sampling procedure that is designed to ensure sample integrity by minimizing contamination of brine samples through the dissolution of overlying sediments and evaporates, that may be enriched in lithium. All holes were drilled to a depth sufficient to ensure penetration of the overlying clay layer, which varies in thickness between one and over three metres. Below the clays, a medium to coarse grained sand aquifer was encountered containing high-grade lithium brine in its porous space. As previously outlined, a historical drill hole in the south eastern margin of the salar indicates the presence of this aquifer to a vertical depth of at least 75 metres, with material coarsening at depth to a coarse basal conglomerate (SEGEMAR; www.segemar.gov.ar).

Sample integrity was maintained by pushing four inch casing down into the hole and pumping, where possible, the contents of the hole. The hole was then left to refill from the aquifer below, ensuring proper representation of brine geochemistry. This brine was then sampled and decanted before collection in sealed plastic containers that had been previously rinsed in the same brine. All samples were sent to ALS Laboratory Group, Environmental Division, in Fort Collins, CO, USA where Rodinia is sending both its Diablillos and Clayton Valley project samples.

Rodinia's auger drill exploration program is expected to continue on a 300 metre by 300 metre grid across the property, and gravity surveys and a reverse circulation ("RC") drill program are planned. The gravity survey will be used to determine the basement depth of the prospective areas over the salar and will help generate the initial targets for a planned 32 drill hole RC program. The continuation of the auger drill program and the initiation of gravity surveys and RC drilling are expected to lead towards a resource estimate at Diablillos later in 2010.

The project is supervised by William Randall MSc (Geology), the Vice President Exploration of Rodinia. Mr. Randall is a qualified person, as defined by National Instrument 43-101, and he has reviewed and approved the scientific and technical information in this release. According to the Company's sampling protocol, sample size is to exceed 300 millilitres and be stored in clean, secure containers for transportation. The prepared samples are then forwarded to the ALS Laboratory Group, Environmental Division, in Fort Collins, CO (USA) for analysis. A rigorous QA/QC program is implemented consisting of regular insertion of standards and blanks to ensure laboratory integrity.

About Rodinia Minerals Inc.:

Rodinia Minerals Inc. is a Canadian mineral exploration company with a primary focus on lithium exploration and development in North and South America. The Company is positioned to capitalize on the expected increase in demand for lithium carbonate that is projected to result from the anticipated paradigm shift to mass adoption and use of key lithium applications like lithium-ion batteries as well as glass ceramics, greases, pharmaceuticals etc.

Rodinia is currently exploring its Clayton Valley project in Nevada, USA, which surrounds the only lithium-brine producer in North America, and its Diablillos project in Salta, Argentina.

Please visit the Company's web site at www.rodiniaminerals.com or write us at info@rodiniaminerals.com

Cautionary Notes

Except for statements of historical fact contained herein, the information in this press release constitutes "forward-looking information" within the meaning of Canadian securities law. Such forward-looking information may be identified by words such as "plans", "proposes", "estimates", "intends", "expects", "believes", "may", "will" and include without limitation, statements regarding the impact of the drill program at the Diablillos property and results of such drill program; the potential of the Company's projects; the potential results and timetable for further exploration with respect to the Clayton Valley project and the Diablillos property, the timetable with respect to future acquisitions and exploration developments at Clayton Valley and Diablillos, timetable for further exploration, analysis and development, title disputes or claims; and governmental approvals and regulation. There can be no assurance that such statements will prove to be accurate; actual results and future events could differ materially from such statements. Factors that could cause actual results to differ materially include, among others, metal prices, competition, financing risks, acquisition risks, risks inherent in the mining industry, and regulatory risks. Most of these factors are outside the control of the Company. Investors are cautioned not to put undue reliance on forward-looking information. Except as otherwise required by applicable securities statutes or regulation, the Company expressly disclaims any intent or obligation to update publicly forward-looking information, whether as a result of new information, future events or otherwise.

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS RELEASE.

For more information, please contact
Rodinia Minerals Inc.
David Stein
President & CEO
+1 (416) 861-5812
or
Rodinia Minerals Inc.
Aaron Wolfe
Vice President, Corporate Development
+1 (416) 309-2696

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