JOINT FILING AGREEMENT
Exhibit 99.1
In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the
undersigned (each, a “Joint Filer”) hereby agree to the joint filing with one another on
behalf of each of them to a statement on Schedule 13D with respect to the Common Stock, par value
$0.01 per share, of GeoResources, Inc. beneficially owned by each of them. This Joint Filing
Agreement shall be included as an exhibit to such Schedule 13D.
IN WITNESS WHEREOF, each of the undersigned has caused this Joint Filing Agreement to be duly
executed and delivered as of the 24th day of April, 2007.
| WACHOVIA CAPITAL PARTNERS 2005, LLC | ||||||||
| By: | WCP Management Company 2005, LLC, | |||||||
| its sole managing member | ||||||||
| By: | /s/ Xxxxx X. Xxxxxx | |||||||
| Name: | Xxxxx X. Xxxxxx | |||||||
| Title: | Managing Member and Managing Director | |||||||
| WCP MANAGEMENT COMPANY 2005, LLC | ||||||||
| By: | /s/ Xxxxx X. Xxxxxx | |||||||
| Name: | Xxxxx X. Xxxxxx | |||||||
| Title: | Managing Member and Managing Director | |||||||
| /s/ Xxxxx X. Xxxxxx | ||||||||
| Xxxxx X. Xxxxxx | ||||||||
| /s/ Xxxxx X. Xxxxxxx | ||||||||
| Xxxxx X. Xxxxxxx | ||||||||
