DAWSON GEOPHYSICAL CO — Director's Dealing 2008

Oct 27, 2008

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TGC INDUSTRIES INC (TGE)
CIK: 0000799165
Period of Report: 2008-10-24

Reporting Person: WHITENER WAYNE A (Director, President and CEO)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	86555	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option	$4.60	2010-06-06	Common Stock (57881)	57881	Direct

Footnotes

F1: Adjusted for the Company's 5% stock dividends paid to all holders of record of common stock on April 27, 2007 and April 28, 2008.

F2: Currently exercisable.