Michel T. Halbouty Chair in Geology, Department of Geology and Geophysics
Co-Director, Stable Isotope Geosciences Facility
Grossman's Departmental web page | CV

Offices: 210 Halbouty Building
Phone: Office (979) 845-0637
Email: e-grossman@tamu.edu

News: As part of a $5M allocation to support mass spectrometry at Texas A&M provided by the Chancellor of the System, we have been allocated $1 million to purchase a clumped isotope mass spectrometer system for SIGF, and gas chromatograph-combustion-isotope ratio mass spectrometer system (GC-C-MS-IRMS) to be housed in the SIBS Lab within the College of Agriculture and Life Sciences. This officially launchs the Stable Isotope Partnership for Ecology, Environment, and Energy Research (SIPEEER), an effort to coordinate Stable Isotope GeoBioScience at Texas A&M.

Update: SIGF, SIBS Laboratory, and the Williams Radiogenic Geosciences Laboratory (Isotope Analyses Subunit of the Mass Spectrometry Collaborative Core Steering Committee at TAMU) have purchased seven mass spectrometers as part of SIPEEER, another TAMU allocation, an NSF MRI, and a start-up package for Yige Zhang (OCNG).  Installations are ongoing!


Stable isotope geochemistry (C, N, O, clumped); Paleoclimate and global change; Biogeochemistry and geomicrobiology of aquifer systems

My research applies stable isotope geochemistry to understand environmental and paleoenvironmental change and its causes. Ongoing projects of current students include (1) Environmental change and extinction with the Neogene closing of the Central American Isthmus (funded by NSF; Divya Saxena, Ph.D. candidate, Paola Rachello-Dolmen, Post-doc, and Aaron O'Dea, Smithsonian Tropical Research Institute); (2) Constraining rates of C-O bond reordering in biogenic calcite: Implications for clumped isotope thermometry and basin modeling (with Brock Shenton, M.S. '14, Greg Henkes (
Ph.D. '14, JHU; now at Stony Brook),  and Ben Passey (now at Michigan), and Alberto Perez-Huerta (Alabama); (3) Circulation changes in the epicontinental seas of Carboniferous North America during formation of Pangea and its role in Late Paleozoic Ice Age (previously funded by NSF; Andy Roark, M.S. '14, and Debbie Thomas, Brent Miller, Tom Olszewski, Anne Raymond, Tom Yancey); (4) The isotopic record of the modern and historic water in the Brazos River, central Texas (Alex vanPlantinga, Ph.D. candidate).

My students find jobs in all aspects of geosciences, including academia (Kobashi, Mii, Routh, Romanek, Zhang), petroleum industry (Beck, Coffman, Gentry, Katz, Roark, Shenton, Sprague), environmental industry and consulting firms (Schlichenmeyer, Strauss), and governmental and non-governmental agencies (Adlis, Canova).


  • GEOL 101 (4). Principles of Geology
  • GEOL 311 (1) Principles of Geological Writing
  • GEOL 648 (3). Stable Isotope Geology
  • GEOL 658 (3) Earth Systems through Deep Time (with A. Raymond)  
  • GEOL 681 (1). Seminar (Recent topics: Stable Isotope Geoscience)
  • GEOS 405 (3) Environmental Geosciences

  • Two ThermoFinnigan/Scientific isotope ratio mass spectrometers (MAT253, DeltaPlusXP) and several peripherals for carbonate, water, and organic matter analyses (Kiel IV, Gas Bench II, two EAs, TC/EA)
  • Contract analyses
    • Carbonate samples
    • Water δ18O and δD
    • Water δ13C
    • δ13C, δ15N, %C, %N, C/N of organic matter