In collaboration, a leading oil and gas services provider independently assessed free gas within the reservoir. That evaluation was performed across sixty (60) feet of section, which encompassed the twenty-one (21) foot cored interval in the wellbore, targeted so that all of the new core analyses could be accurately incorporated. Free gas calculated for this section was more than one and a half (1.5) times previous estimates for the same interval. If this assessment is representative of the entire interval, the gas in place in the Burkley Phillips #1 well could be in excess of 500 Bcf/section.

 Mainland and its working interest partners control in excess of 17,800 net acres or 28 sections on the Buena Vista prospect area on which the Burkley Phillips No. 1 well was drilled to 22,000 feet and logged. A conventional core was secured just below 20,415 feet for analysis. Post merger, Mainland owns 92% of the 28 sections in the Buena Vista prospect.

 The Company announced on February 16, 2011, the initial shale gas analysis on the well demonstrated 331 billion cubic feet of gas in place (290 billion cubic feet free gas in place) per 640 acre section, however, new data received suggests that the earlier reported gas in place number could be markedly higher. Both free gas and adsorbed gas must be considered when calculating total gas in place within a reservoir.

 The new data includes adsorption isotherm measurements taken from three shale samples within the cored interval. This data suggests that adsorbed gas storage capacity is at least three (3) times higher than volumes previously assumed when calculating gas in place, in turn suggesting that the shale's at Buena Vista are capable of retaining greater amounts of gas.

 CEO of Mainland Resources, Mike Newport states, "The new data we are receiving continues to be very encouraging.  We are continuing with the in-depth analysis and are convinced that the Burkley Phillips #1 will show that we are looking at a significant gas reservoir here."

 Further evaluation of this data is being conducted to assist in creating a composite resource value from the Burkley Phillips No. 1 well and its application to the entire reservoir covered by Mainland's 28 sections of land over the Buena Vista Prospect.

 Mainland Resources, Inc. is engaged in the exploration of oil and gas resources. The Company's current initiatives are focused on the acquisition and development of acreage in emerging and early developing oil and gas regions with the potential for material discoveries.

For information see: http://www.mainlandresources.com

Symbol:    MNLU - OTCQB, Symbol: 5MN; Frankfurt, WKN No.: A0ND6N
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FORWARD-LOOKING STATEMENTS ARE SUBJECT TO CERTAIN RISKS AND UNCERTAINTIES THAT COULD CAUSE ACTUAL RESULTS TO DIFFER MATERIALLY FROM ANY FUTURE RESULTS, PERFORMANCE OR ACHIEVEMENTS EXPRESSED OR IMPLIED BY SUCH STATEMENTS. STATEMENTS THAT ARE NOT HISTORICAL FACTS, INCLUDING STATEMENTS THAT ARE PRECEDED BY, FOLLOWED BY, OR THAT INCLUDE SUCH WORDS AS "ESTIMATE," "ANTICIPATE," "BELIEVE," "PLAN" OR "EXPECT" OR SIMILAR STATEMENTS ARE FORWARD-LOOKING STATEMENTS.  RISKS AND UNCERTAINTIES FOR THE COMPANY INCLUDE, BUT ARE NOT LIMITED TO, THE RISKS ASSOCIATED WITH OIL AND GAS PROPERTY EXPLORATION AND FUNDING AS WELL AS THE RISKS SHOWN IN THE COMPANY'S MOST RECENT ANNUAL REPORT ON FORM 10-K AND ITS QUARTERLY REPORTS ON FORM 10-Q, AND FROM TIME-TO-TIME IN OTHER PUBLICLY AVAILABLE INFORMATION REGARDING THE COMPANY.  OTHER RISKS INCLUDE RISKS ASSOCIATED WITH THE REGULATORY APPROVAL PROCESS, COMPETITIVE COMPANIES, FUTURE CAPITAL REQUIREMENTS AND THE COMPANY'S ABILITY AND LEVEL OF SUPPORT FOR ITS EXPLORATION ACTIVITIES.  THERE CAN BE NO ASSURANCE THAT THE COMPANY'S EXPLORATION EFFORTS WILL SUCCEED AND THE COMPANY WILL ULTIMATELY ACHIEVE COMMERCIAL SUCCESS.  THESE FORWARD-LOOKING STATEMENTS ARE MADE AS OF THE DATE OF THIS NEWS RELEASE, AND THE COMPANY ASSUMES NO OBLIGATION TO UPDATE THE FORWARD-LOOKING STATEMENTS, OR TO UPDATE THE REASONS WHY ACTUAL RESULTS COULD DIFFER FROM THOSE PROJECTED IN THE FORWARD-LOOKING STATEMENTS. ALTHOUGH THE COMPANY BELIEVES THAT THE BELIEFS, PLANS, EXPECTATIONS AND INTENTIONS CONTAINED IN THIS NEWS RELEASE ARE REASONABLE, THERE CAN BE NO ASSURANCE THOSE BELIEFS, PLANS, EXPECTATIONS OR INTENTIONS WILL PROVE TO BE ACCURATE. INVESTORS SHOULD CONSIDER ALL OF THE INFORMATION SET FORTH HEREIN AND SHOULD ALSO REFER TO THE RISK FACTORS DISCLOSED IN THE COMPANY'S PERIODIC REPORTS FILED FROM TIME-TO-TIME WITH THE UNITED STATES SECURITIES AND EXCHANGE COMMISSION.

THIS NEWS RELEASE HAS BEEN PREPARED BY MANAGEMENT OF THE COMPANY WHO TAKES FULL RESPONSIBILITY FOR ITS CONTENTS. EACH OF FINRA, THE SEC AND THE BRITISH COLUMBIA SECURITIES COMMISSION NEITHER APPROVES NOR DISAPPROVES OF THE CONTENTS OF THIS NEWS RELEASE.  THIS NEWS RELEASE SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES IN ANY JURISDICTION IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH JURISDICTION.

THE COMPANY AND AMERICAN EXPLORATION CORPORATION INTEND TO FILE CERTAIN MATERIALS WITH THE UNITED STATES SECURITIES AND EXCHANGE COMMISSION IN CONNECTION WITH THE PROPOSED MERGER TRANSACTION BETWEEN THE PARTIES ANNOUNCED ON MARCH 23, 2010, INCLUDING THE FILING BY THE COMPANY WITH THE SEC OF A REGISTRATION STATEMENT ON FORM S-4, WHICH WILL INCLUDE A PRELIMINARY PROSPECTUS AND RELATED MATERIALS TO REGISTER THE SECURITIES OF THE COMPANY TO BE ISSUED IN EXCHANGE FOR SECURITIES OF AMERICAN EXPLORATION. THE REGISTRATION STATEMENT WILL INCORPORATE A JOINT PROXY STATEMENT/ PROSPECTUS THAT THE COMPANY AND AMERICAN EXPLORATION PLAN TO FILE WITH THE SEC AND MAIL TO THEIR RESPECTIVE STOCKHOLDERS IN CONNECTION WITH OBTAINING STOCKHOLDER APPROVAL OF THE PROPOSED MERGER. THE REGISTRATION STATEMENT AND THE PROXY STATEMENT/PROSPECTUS WILL CONTAIN IMPORTANT INFORMATION ABOUT THE COMPANY, AMERICAN EXPLORATION, THE MERGER AND RELATED MATTERS. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT AND THE PROXY STATEMENT/PROSPECTUS CAREFULLY WHEN THEY ARE AVAILABLE. INVESTORS AND SECURITY HOLDERS WILL BE ABLE TO OBTAIN FREE COPIES OF THE REGISTRATION STATEMENT AND THE PROXY STATEMENT/PROSPECTUS WHEN THEY BECOME AVAILABLE, AND OTHER DOCUMENTS FILED WITH THE SEC BY THE COMPANY AND AMERICAN EXPLORATION, THROUGH THE WEB SITE MAINTAINED BY THE SEC AT WWW.SEC.GOV.  THE COMPANY'S SECURITY HOLDERS WILL ALSO RECEIVE INFORMATION AT AN APPROPRIATE TIME ON HOW TO OBTAIN THESE DOCUMENTS FREE OF CHARGE FROM THE COMPANY. IN ANY EVENT, DOCUMENTS FILED BY THE COMPANY WITH THE SEC MAY BE OBTAINED FREE OF CHARGE BY CONTACTING THE COMPANY AT: MAINLAND RESOURCES, INC.; ATTENTION: MR. WILLIAM THOMAS, CFO; 21 WATERWAY AVENUE, SUITE 300, THE WOODLANDS, TEXAS 77380; FACSIMILE: (713) 583-1162.

EACH OF THE COMPANY AND AMERICAN EXPLORATION, AND THEIR RESPECTIVE DIRECTORS AND EXECUTIVE OFFICERS, ALSO MAY BE DEEMED TO BE PARTICIPANTS IN THE SOLICITATION OF PROXIES FROM THEIR RESPECTIVE STOCKHOLDERS IN CONNECTION WITH THE TRANSACTION DESCRIBED HEREIN. INFORMATION REGARDING THE SPECIAL INTERESTS OF THESE DIRECTORS AND EXECUTIVE OFFICERS IN THE TRANSACTION DESCRIBED HEREIN WILL BE INCLUDED IN THE PROXY STATEMENT/PROSPECTUS DESCRIBED ABOVE.