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Home Memberships About Us Events Donate Contact DGSDGS Annual Boil Sponsorships More Not Receiving Emails. Please add webmasterdgs. org to your contacts to ensure our emails aren39t sent to spam Welcome to dallas GEOLOGICAL SOCIETY about us The DGS currently serves more than 400 Dallasarea geoscientists. DGS cooperates with other geological organizations such as the Geological Society of America GSA the Society of Independent Professional Earth Scientists the American Geophysical Union the Society of Exploration Geophysicists and the Dallas Geophysical Society to provide information and services to our members.