**EXHIBIT 31.2**

**CERTIFICATIONOF PRINCIPAL FINANCIAL OFFICER**

I, Kenneth W.Uselton, Principal Financial Officer of TGC Industries, Inc. certify that:

1.             I have reviewed this annual reporton Form 10-KSB of TGC Industries, Inc.;

2.                                       Basedon my knowledge, this annual report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements were made, notmisleading with respect to the period covered by this annual report;

3.                                       Basedon my knowledge, the financial statements, and other financial informationincluded in this annual report, fairly present in all material respects thefinancial condition, results of operations, and cash flows of the registrant asof, and for, the periods presented in this annual report;

4.                                       Theregistrant’s other certifying officer and I are responsible for establishingand maintaining disclosure controls and procedures (as defined in Exchange ActRules 13a-15(e) and 15d-15(e)) for the registrant and we have:

a)                                      designedsuch disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidatedsubsidiaries, is made known to us by others within those entities, particularlyduring the period in which this annual report is being prepared;

b)                                     evaluatedthe effectiveness of the registrant’s disclosure controls and procedures andpresented in this annual report our conclusions about the effectiveness of thedisclosure controls and procedures as of the end of the period covered by thisannual report based on such evaluation; and

c)                                      disclosedin this annual report any change in the registrant’s internal control overfinancial reporting that occurred during the registrant’s most recent fiscalyear that has materially affected, or is reasonably likely to materiallyaffect, the registrant’s internal control over financial reporting.

5.                                       Theregistrant’s other certifying officer and I have disclosed, based on our mostrecent evaluation of internal control over financial reporting, to theregistrant’s auditors and the audit committee of registrant’s board ofdirectors (or persons performing the equivalent function):

a)                                      allsignificant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely toadversely affect the registrant’s ability to record, process, summarize, andreport financial information; and

b)                                     anyfraud, whether or not material, that involves management or other employees whohave a significant role in the registrant’s internal control over financialreporting.

 
| Date: March 28, 2007 | By:    | /s/ Kenneth Uselton                      |
|----------------------|--------|------------------------------------------|
|                 |   |  Kenneth Uselton, Secretary and     |
|                 |   |  Treasurer (Principal Financial and |
|                 |   |  Accounting Officer)                |

 

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