Martha (Rebecca) R Stokes, Ph.D.

Martha (Rebecca) Stokes is a Physical Scientist with the USGS Geology, Energy & Minerals (GEM) Science Center in Reston, VA.


Rebecca received her B.S. in Geology from Texas A&M University in 2006, and a M.S. (2008) and Ph.D. (2012) from Indiana University focused on metamorphic petrology and mineral fabric development. Rebecca was a Postdoctoral Associate at MIT from 2012-2013 where she led a team tasked with developing an alternative potash fertilizer using K-feldspar. In 2013, Rebecca joined Chevron ETC where she served as a clay mineralogist and led research efforts investigating methods to quantify rock fabric in unconventional shale reservoirs. Rebecca joined the USGS in 2020 where her principal research interests include: spectroscopic analysis of hydrocarbon bearing rocks, porosity and mineral fabric development in sedimentary rock systems, and cross-disciplinary approaches to explore complex geologic questions.


  • Ph.D. Geology, Indiana University, 2012
  • M.S. Geology, Indiana University, 2008
  • B.S. Geology, Texas A&M University, 2006

Work Experience:

  • August 2020 to Present: Physical Scientist, USGS Geology, Energy, and Minerals Science Center, Reston, VA
  • September 2013-October 2019: Research Scientist, Chevron ETC, Houston, TX
  • September 2012-September 2013: Postdoctoral Research Associate, Massachusetts Institute of Technology, Cambridge, MA

Professional Affiliations:

  • Clay Minerals Society, Member
  • Society of Core Analysts, Member
  • Geological Society of America, Member
  • American Association of Petroleum Geologists (AAPG), Member