UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549





FORM 10-Q/A

(Amendment No. 1)







|x | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------------------------

FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2008 OR



| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ----------------------------------------------------------------------------------------

FOR THE TRANSITION PERIOD FROM  TO
.

Commission file number 001-32714





GASTAR EXPLORATION LTD.

(Exact name of registrant as specified in its
charter)







|                                                               |  |                                  
|-------------------------------------------------------------- |  | ---------------------------------
|Alberta, Canada                                                |  | 98-0570897                       
|(State or other jurisdiction of incorporation or organization) |  | (IRS Employer Identification No.)
|                                                               | 
|1331 Lamar Street, Suite 1080 Houston, Texas 77010             |  | 77010                            
|(Address of principal executive offices)                       |  | (ZIP Code)                       

(713) 739-1800

(Registrants telephone number, including area code)





Indicate by check mark whether the registrant
(1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and
(2) has been subject to such filing requirements for the past 90 days.    Yes  x    No   ̈

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definition
of large accelerated filer, accelerated filer and smaller reporting company in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer   ̈    Accelerated filer  x    Non-accelerated
filer   ̈    Smaller reporting company  ̈

Indicate by
check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes   ̈    No  x

Total number of common shares, no par value per share, as of May 12, 2008 was 208,194,570.









---

Explanatory Note

Gastar Exploration Ltd. (the Company) filed its Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2008 with the Securities and Exchange Commission on May 12, 2008
(Original Filing). The Company is filing this Amendment No. 1 on Form 10-Q/A (this Amendment) solely to amend Exhibits 31.1 (Certification of Chief Executive Officer) and 31.2 (Certification of Chief Financial Officer).

Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended, this Amendment contains only the text included in Exhibits
31.1 and 31.2 to the Original Filing. Those sections or exhibits of the Original Filing that are unaffected by this Amendment are not included herein.

This Amendment continues to speak as of the date of the Original Filing, and the Company has not updated the disclosure contained herein to reflect events that have occurred since the filing of the Original Filing.
Accordingly, this Amendment should be read in conjunction with the Companys other filings made with the Securities and Exchange Commission subsequent to the filing of the Original Filing.

PART II  OTHER INFORMATION



|Item 6. | Exhibits
|------- | --------

The following is a
list of exhibits filed as part of this Form 10-Q/A. Where so indicated, exhibits, which were previously filed, are incorporated herein by reference.



|              |  |                                                                                                    
|------------- |  | ---------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                        
|31.1         |  | Certification of chief executive officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
|              | 
|31.2         |  | Certification of chief financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.



| | Filed herewith.
|- | ---------------



1



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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.



|                      |  |                         |  |                                                                         
|--------------------- |  | ----------------------- |  | ------------------------------------------------------------------------
|                      |  | GASTAR EXPLORATION LTD.
|                      |  |                        
|Date: August 11, 2008 |  | By:                     |  | /s/ J. RUSSELL PORTER                                                   
|                      |  |                         |  | J. Russell Porter                                                       
|                      |  |                         |  | Chairman, President and Chief Executive Officer                         
|                      |  |                         |  | (Duly authorized officer and principal executive officer)               
|                      |  |                        
|Date: August 11, 2008 |  | By:                     |  | /s/ MICHAEL A. GERLICH                                                  
|                      |  |                         |  | Michael A. Gerlich                                                      
|                      |  |                         |  | Vice President and Chief Financial Officer                              
|                      |  |                         |  | (Duly authorized officer and principal financial and accounting officer)



2



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EXHIBIT INDEX



|              |  |                                                                                                                                                                                                                                                                                                                                                                                      
|------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                          
|3.1           |  | Amended and Restated Articles of Incorporation of Gastar Exploration Ltd. (incorporated herein by reference to Appendix B to the Companys Proxy Statement for the Annual and Special Meeting
of Shareholders dated April 30, 2007 to be held June 1, 2007.                                                                                                                          
|              | 
|3(ii)         |  | Bylaws of Gastar Exploration Ltd. approved at March 31, 2000 and amended August 21, 2006 (incorporated herein by reference to Exhibit 3(ii) of the Companys Current Report on Form 8-K dated
December 19, 2006. File No. 001-37214).                                                                                                                                                
|              | 
|4.1           |  | Indenture dated November 12, 2004 between Gastar Exploration Ltd. and CIBC Mellon Trust Company as trustee (incorporated by reference to Exhibit 4.1 of the Companys Registration Statement
on Form S-1, filed on August 12, 2005. Registration No. 333-127498).                                                                                                                    
|              | 
|4.2           |  | Form of 9.75% Convertible Senior Unsecured Subordinated Debenture of Gastar Exploration Ltd. (incorporated by reference to Exhibit 4.2 of the Companys Registration Statement on Form S-1,
filed on August 12, 2005. Registration No. 333-127498).                                                                                                                                  
|              | 
|4.3           |  | Agency Agreement dated as of November 12, 2004 between Gastar Exploration Ltd. and Westwind Partners Inc. in connection with issuances of 9.75% Convertible Senior Unsecured Subordinated
Debenture of Gastar Exploration Ltd. (incorporated by reference to Exhibit 4.4 of the Companys Registration Statement on Form S-1, filed on August 12, 2005. Registration No. 333-127498).
|              | 
|4.4           |  | Form of Subscription Agreement for U.S. purchasers of 9.75% Convertible Senior Unsecured Subordinated Debenture of Gastar Exploration Ltd (incorporated by reference to Exhibit 4.5 of the
Companys Registration Statement on Form S-1, filed on August 12, 2005. Registration No. 333-127498).                                                                                     
|              | 
|4.5           |  | Form of Subscription Agreement for foreign purchasers of 9.75% Convertible Senior Unsecured Subordinated Debenture of Gastar Exploration Ltd. (incorporated by reference to Exhibit 4.6 of the
Companys Registration Statement on Form S-1, filed on August 12, 2005. Registration No. 333-127498).                                                                                 
|              | 
|4.6           |  | Registration Rights Agreement dated as of June 17, 2005, by and among Gastar Exploration Ltd. and the purchasers named therein (incorporated by reference to Exhibit 4.9 of the Companys
Registration Statement on Form S-1, filed on August 12, 2005. Registration No. 333-127498).                                                                                                
|              | 
|4.7           |  | Form of Subscription Agreement for U.S. purchasers of common shares of Gastar Exploration Ltd. in a private placement dated June 30, 2005 (incorporated by reference to Exhibit 4.10 of the
Companys Registration Statement on Form S-1, filed on August 12, 2005. Registration No. 333-127498).                                                                                    
|              | 
|4.8           |  | Form of Subscription Agreement for foreign purchasers of common shares of Gastar Exploration Ltd. in a private placement dated June 30, 2005 (incorporated by reference to Exhibit 4.11 of the
Companys Registration Statement on Form S-1, filed on August 12, 2005. Registration No. 333-127498).                                                                                 
|              | 
|4.9           |  | Form of 10% subordinated note issued June 2004 (incorporated by reference to Exhibit 4.14 of the Companys Amendment No. 4 to Registration Statement on Form S-1/A, filed on December 22,
2005. Registration No. 333-127498).                                                                                                                                                        
|              | 
|4.10          |  | Form of warrant to purchase common shares of Gastar Exploration Ltd issued in connection with the sale of 10% subordinated notes in June 2004 (incorporated by reference to Exhibit 4.15 of the
Companys Registration Statement on Form S-1, filed on August 12, 2005. Registration No. 333-127498).                                                                                
|              | 
|4.11          |  | Agreement between Gastar Exploration Ltd. and GeoStar Corporation dated August 11, 2005 (incorporated by reference to Exhibit 4.17 of the Companys Amendment No. 1 to Registration Statement
on Form S-1/A, filed on October 30, 2005. Registration No. 333-127498).                                                                                                                
|              | 
|4.12          |  | Common Share Purchase Agreement between Gastar Exploration Ltd. and Chesapeake Energy Corporation dated November 4, 2005 (incorporated by reference to Exhibit 4.19 of the Companys
Amendment No. 2 to Registration Statement on Form S-1/A, filed on November 22, 2005. Registration No. 333-127498).                                                                              
|              | 
|4.13          |  | Registration Rights Agreement between Gastar Exploration Ltd. and Chesapeake Energy Corporation dated November 4, 2005 (incorporated by reference to Exhibit 4.20 of the Companys Amendment
No. 2 to Registration Statement on Form S-1/A, filed on November 22, 2005. Registration No. 333-127498).                                                                                
|              | 
|4.14          |  | Facsimile of common share certificate of Gastar Exploration Ltd. (incorporated by reference to Exhibit 4.21 of the Companys Amendment No. 3 to Registration Statement on Form S-1/A, dated
December 15, 2005. Registration No. 333-127498).                                                                                                                                         
|              | 
|4.15          |  | Form of Subscription Agreement for private offering of 25.0 million common shares (incorporated by reference to the Companys Current Report on Form 8-K dated November 15,
2006.)                                                                                                                                                                                                   



3



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|       |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|------ |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|4.16   |  | Indenture related to the 123/4% Senior Secured Notes due
November 29, 2012, dated as of November 29, 2007, between Gastar Exploration USA, Inc., Gastar Exploration Ltd., Wells Fargo Bank, National Association, as Trustee and Collateral Agent and each of the other Guarantors party thereto
(including the form of 123/4% Senior Secured Note due 2012) 2007 (incorporated by reference to the Companys Current Report
on Form 8-K dated December 4, 2007).
|       | 
|4.17   |  | Registration Rights Agreement, dated as of November 29, 2007, among Gastar Exploration USA, Inc., Gastar Exploration Ltd., each of the other Guarantors party thereto, Jefferies & Company,
Inc., Johnson Rice & Company L.L.C. and Pritchard Capital Partners, LLC2007 (incorporated by reference to the Companys Current Report on Form 8-K dated December 4, 2007).                                                                                          
|       | 
|4.18   |  | Intercreditor Agreement dated November 29, 2007 among Gastar Exploration USA, Inc., Gastar Exploration Ltd., each of the Guarantors party thereto, Amegy Bank National Association, as First
Priority Agent, and Wells Fargo National Association, as Second Priority Agent2007 (incorporated by reference to the Companys Current Report on Form 8-K dated November 13, 2007).                                                                                 
|       | 
|4.19   |  | Credit Agreement, dated November 29, 2007, among Gastar Exploration USA, Inc., the Guarantors party thereto and Amegy Bank National Association as Administrative Agent and Letter of Credit
Issuer2007 (incorporated by reference to the Companys Current Report on Form 8-K dated December 4, 2007).                                                                                                                                                          
|       | 
|10.1*  |  | The Gastar Exploration Ltd. 2002 Stock Option Plan, dated July 5, 2002 as periodically amended (incorporated by reference to Exhibit 4.1 of the Companys Current Report on Form 8-K dated
December 4, 2006. File No. 001-32714).                                                                                                                                                                                                                                
|       | 
|10.2*  |  | Employment Agreement dated March 23, 2005 by and among First Sourcenergy Wyoming, Inc., Gastar Exploration Ltd. and J. Russell Porter (incorporated by reference to Exhibit 10.2 of the
Companys Registration Statement on Form S-1, filed on August 12, 2005. Registration No. 333-127498).                                                                                                                                                                    
|       | 
|10.3*  |  | Employment Agreement dated April 26, 2005 by and among First Sourcenergy Wyoming, Inc., Gastar Exploration Ltd. and Michael A Gerlich (incorporated by reference to Exhibit 10.3 of the
Companys Registration Statement on Form S-1, filed on August 12, 2005. Registration No. 333-127498).                                                                                                                                                                    
|       | 
|10.4   |  | Purchase and Sale Agreement between GeoStar Corporation and Gastar Exploration Ltd. covering Wyoming and Montana producing properties dated June 16, 2005 (incorporated by reference to Exhibit
10.4 of the Companys Amendment No. 1 to Registration Statement on Form S-1/A, filed on October 30, 2005. Registration No. 333-127498).                                                                                                                          
|       | 
|10.5   |  | Purchase and Sale Agreement between GeoStar Corporation and Gastar Exploration Ltd. covering Wyoming and Montana non-producing properties dated June 16, 2005 (incorporated by reference to
Exhibit 10.5 of the Companys Amendment No. 1 to Registration Statement on Form S-1/A, filed on October 30, 2005. Registration No. 333-127498).                                                                                                                      
|       | 
|10.6   |  | Purchase and Sale Agreement between GeoStar Corporation and Gastar Exploration Ltd. covering Texas producing properties dated June 16, 2005 (incorporated by reference to Exhibit 10.6 of the
Companys Amendment No. 1 to Registration Statement on Form S-1/A, filed on October 30, 2005. Registration No. 333-127498).                                                                                                                                        
|       | 
|10.7   |  | Purchase and Sale Agreement between GeoStar Corporation and Gastar Exploration Ltd. covering Texas non-producing properties dated June 16, 2005 (incorporated by reference to Exhibit 10.7 of the
Companys Amendment No. 1 to Registration Statement on Form S-1/A, filed on October 30, 2005. Registration No. 333-127498).                                                                                                                                    
|       | 
|10.8   |  | Participation and Operating Agreement between GeoStar Corporation and Gastar Exploration Ltd. dated June 15, 2001 (incorporated by reference to Exhibit 4.19 of the Companys Amendment No. 2
to Registration Statement on Form S-1/A, filed on November 22, 2005. Registration No. 333-127498).                                                                                                                                                                 
|       | 
|10.9   |  | Promissory Note for $15 million between GeoStar Corporation and Gastar Exploration Ltd. dated August 11, 2001 (incorporated by reference to Exhibit 10.9 of the Companys Amendment No. 1 to
Registration Statement on Form S-1/A, filed on October 30, 2005. Registration No. 333-127498).                                                                                                                                                                      
|       | 
|10.10* |  | Form of Gastar officer stock option grant (incorporated herein by reference to Exhibit 10.10 of the Companys annual Report on form 10-K for the fiscal year ended December 31, 2005. File
No. 001-32714).                                                                                                                                                                                                                                                       
|       | 
|10.11* |  | Gastar Exploration Ltd. 2006 Long-Term Stock Incentive Plan (incorporated herein by reference to Exhibit 10.11 of the Companys Quarterly Report on Form 10-Q for the quarter ended June 30,
2006. File No. 001-32714).                                                                                                                                                                                                                                          



4



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|       |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|------ |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|10.12* |  | Form of Indemnity Agreement for Directors and Certain Executive Officers (incorporated herein by reference to Exhibit 10.1 of the Companys Current Report on Form 8-K dated
December 19, 2006. File No. 001-32714).                                                                                                                                                                                                                                                                                                    
|       | 
|10.13* |  | Form of Gastar Exploration Ltd. Employee Change of Control Severance Plan effective as of March 23, 2007 (incorporated by reference to Exhibit 10.13 of the Companys Annual Report on Form
10-K for the fiscal year ended December 31, 2006. File No. 001-32714).                                                                                                                                                                                                                                                      
|       | 
|10.14  |  | Common Share Purchase Agreement between Gastar Exploration Ltd. and Navasota Resources, L.P. dated as of May 9, 2007, in connection with the issuance and sale of 10,000,000 common shares
(incorporated by reference to Exhibit 10.1 of the Companys Current Report on Form 8-K dated May 15, 2007. File No. 001-32714).                                                                                                                                                                                              
|       | 
|10.15  |  | Registration Rights Agreement by and between Gastar Exploration Ltd. and Navasota Resources, L.P. dated as of May 9, 2007 (incorporated by reference to Exhibit 10.1 of the Companys Current
Report on Form 8-K dated May 15, 2007. File No. 001-32714).                                                                                                                                                                                                                                                               
|       | 
|10.16  |  | Ratification and Assumption of LOI between and among Gastar Exploration Ltd., Gastar Exploration Texas LP and Navasota Resources, L.P. dated May 9, 2007, with Letter of Intent dated April 27,
2007 between and among Gastar Exploration Ltd., Gastar Exploration Texas LP, Chesapeake Energy Corporation and Chesapeake Exploration Limited Partnership, attached thereto as Exhibit A (incorporated by reference to Exhibit 10.1 of the Companys
Current Report on Form 8-K dated May 15, 2007. File No. 001-32714).
|       | 
|10.17* |  | Letter Agreement dated July 5, 2007, which sets forth the terms of the appointment of Jeffrey C. Pettit as Vice President and Chief Operating Officer of Gastar Exploration Ltd. (incorporated
herein by reference to Exhibit 10.1 of the Companys Current Report on Form 8-K dated August 21, 2007. File No. 001-32714).                                                                                                                                                                                              
|       | 
|10.18* |  | Form of Gastar Exploration Ltd. Employee Change of Control Severance Plan effective as of March 23, 2007 and as amended and restated effective February 15, 2008 (incorporated herein by reference
to Exhibit 21.1 of the Companys Annual Report on Form 10-K for the fiscal year ended December 31, 2007. File No. 001-32714).                                                                                                                                                                                        
|       | 
|14.1   |  | Gastar Exploration Ltd. Code of Ethics, adopted effective December 15, 2005 (incorporated herein by reference to Exhibit 14.1 of the Companys Amendment No 4 to Registration Statement on
Form S-1/A, dated December 22, 2005, Registration No. 333-27498).                                                                                                                                                                                                                                                            
|       | 
|21.1   |  | Subsidiaries of Gastar Exploration Ltd. (incorporated herein by reference to Exhibit 21.1 of the Companys annual Report on Form 10-K for the fiscal year ended December 31, 2007. File No.
001-32714).                                                                                                                                                                                                                                                                                                                 
|       | 
|31.1  |  | Certification of chief executive officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                     
|       | 
|31.2  |  | Certification of chief financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                     



|* | Management contract or compensatory plan or arrangement.
|- | --------------------------------------------------------

| | Filed herewith.
|- | ---------------



5