About us

Founded in 1919, The Dallas Geological Society a constituent member of the Southwest Section of the American Association of Petroleum Geologists (AAPG) and, as a non-profit entity, strives to advance the professional interests of all geoscientists in the Dallas area, regardless of the geoscientific discipline they practice or the industry in which they serve.

The DGS currently serves more than 400 Dallas-area 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. 

The Dallas Geological Society holds monthly luncheon meetings on the second Tuesday of the month (September through June) at Brookhaven College Geotechnology Institute. Luncheon talks vary on a wide range of topics from the world of petroleum geology, geophysics, or engineering.

The DGS International Committee is very active and holds monthly meetings on the third Wednesday evening of the month at Brookhaven Country Club in Farmers Branch. These meetings feature speakers on topical international issues (mainly petroleum exploration).

Rock Face

History of the Dallas Geological Society


The Fort Worth-Dallas Section [ancestor of our Dallas Geological Society] was one of six sections of the Southwestern Geological Society organized in Dallas in 1919 by Robert T. Hill, et al.

The Fort Worth-Dallas Section soon split up into the Fort Worth Section and the Dallas Section. DGS was known as the Dallas Section until 1924, when Southwestern Geological Society was disbanded and we then became Dallas Petroleum Geologists, affiliated with the American Association of Petroleum Geologists.

In 1945 we changed our name to Dallas Geological Society to conform to the nomenclature of societies throughout the world that were affiliated with AAPG.

Published Histories:


Officers 2021-2022


 Daniel Spaulding

 Pioneer Natural Resources

 Past President

 Dan Dolan

 Apex GEOS Investments,   LLC

 President Elect

 Justin Anderson

 Pioneer Natural Resources

 1st Vice President

 Luel Emishaw


 2nd Vice President

 Calvin Nix

 Emerald Energy, LLC


 Caitlin Leslie

 Pioneer Natural Resources

 Treasurer Elect

 Taylor Sanchez

 Pioneer Natural Resources

 International Chair

 Grant Blair

 Denbury Resources


 Nick Parrillo

 Pillar Oil & Gas

Rock Rubble

Committee Chairs

 Membership Chair

 Brandon (BJ) Lycka

 Juno Energy, LLC

 YP Chair

 Sami Doupnik

 U.S. Environmental Protection   Agency

 Scholarship Chair

 Nick Parrillo

 Pillar Oil & Gas


aapg delegates:

Margo J. Liss    (2023)
Calvin Nix    (2023)
Dennis Edwin Thomas    (2023)
Donald Leslie Bailey    (2022)
Margaret E.H. Collins    (2022)
Tina Manning    (2022)

past officers:


President Dan Dolan

1st VPDave Senor

2nd VPBrandon (BJ) Lycka

SecretaryFred Walsh

TreasurerJustin Anderson

Treasurer-ElectCaitlin Leslie

Past PresidentCalvin Nix

President-ElectDaniel Spaulding


President Calvin Nix

1st VPBrandon (BJ) Lycka

2nd VPDylan Collins

SecretaryKeri Viñas

TreasurerDaniel Spaulding

Treasurer-ElectJustin Anderson

Past PresidentTina Manning

President-ElectDan Dolan 

2018 - 2019 Officers

PresidentTina Manning

1st VPDan Dolan

2nd VPChris Mace

SecretaryNeyda Maymi

TreasurerDylan Collins

Treasurer-ElectDan Spaulding

Past PresidentMark Bengtson

President-ElectCalvin Nix

2017 - 2018 Officers

PresidentMark Bengtson

1st VPCalvin Nix

2nd VPJoe Bauman

SecretaryNeyda Maymi

TreasurerDan Dolan

Treasurer-ElectDylan Collins

Past PresidentJohn Stephens

President-ElectTina Manning

2016 - 2017 Officers

PresidentJohn Stephens

1st VPDanny Davidson

2nd VPTina Manning

SecretaryCalvin Nix

TreasurerMitchell Williams

Treasurer-ElectDan Dolan

Past PresidentBradley Winton

President-ElectMark Bengtson

2015 - 2016 Officers

PresidentBradley Winton

1st VPDanny Davidson

2nd VPTina Manning

SecretaryMandi Guerrero

TreasurerMark Bengtson

Treasurer-ElectMitchell Williams

Past PresidentMark Mathisen

President-ElectJohn Stephens

2014 - 2015 Officers

PresidentMark Mathisen

1st VPMatt Hornbach

2nd VPDan Bailey

SecretaryJohn Stephens

TreasurerAndy Juett

Treasurer-ElectMark Bengtson

Past PresidentJoe Davis

President-ElectBradley Winton