My main interests revolve around the evaluation of carbonate depositional systems through an integrated sequence stratigraphic approach; by combining sedimentologic, diagenetic, and petrophysical analyses of modern and ancient depositional systems (outcrop and subsurface) to better constrain the 3-D evolution of these systems through time. While many of the questions being addressed are fundamental in nature, results may also be directly applicable to problems faced within the petroleum and groundwater industries: for example the lateral and vertical distribution of fluid-bearing strata and impermeable horizons. In addition, I continue to have interest in evaluating the sedimentologic and diagenetic responses of carbonate systems to varying frequencies of sea level change (i.e. icehouse vs. greenhouse periods of Earth’s history). Current research locations include the Bahamas, Paradox Basin of Utah, Wind River Basin of Wyoming, and the Michigan Basin. 

Educational Background

Ph.D.  University of Miami, Rosenstiel School of Marine and Atmospheric Science, 1991
M.S.   Southern Methodist University, 1983
B.A.    University of South Florida, 1980

Research Specializations

Carbonate Sedimentology and Diagenesis
Sequence and Cycle Stratigraphy
Petroleum Geology

Ongoing Projects

• Establishing the Relationship between Fracture-related Dolomite and Primary Rock Fabric on the Distribution of Reservoirs in the Michigan Basin
• Paleoceanography of the Michigan Basin during Silurian - influence on reef growth
• Sequence stratigraphy and reservoir characterization of Paleozoic units in the Michigan Basin
• Formation and evolution of algal mounds in the Carboniferous, Paradox Basin
• Carbon Dioxide Sequestration in Petroleum Reservoirs of the Michigan Basin (D. Barnes, P.I.)

Courses Taught

GEOS 100 - Earth Studies
GEOS 131 - Physical Geology
GEOS 132 - Historical Geology
GEOS 646 - Carbonate Depositional Environments
GEOS 650 - Advanced Stratigraphy (Sequence Stratigraphy)
GEOS 660 - Reef Evolution through Time

Selected Publications

1. Grammer, G. M., Harris, P. M., and Eberli, G. P., 2004, Integration of modern and outcrop analogs for reservoir modeling - overview and examples from the Bahamas, in Grammer et. al. (eds.), Integration of Outcrop and Modern Analogs in Reservoir Modeling, AAPG Memoir 80, p. 1-22.
2. Westphal, H., Eberli, G. P., Smith, L. B., and Grammer, G. M., 2004, Reservoir Characterization in the Mississippian Madison Formation, Wind River Basin, Wyoming, AAPG Bulletin, v. 88, p. 405-432. 
3. Grammer, G. M., Harris, P. M., and Eberli, G. P., 2002, Carbonate platforms: exploration and production scale insight from modern analogs in the Bahamas, in M.R. Thomasson and L. C. Lawyer, eds. SEG/AAPG, Open File Publication No. 7, p. 56-62.
4. Swart, P.K., Thorrold, S., Rubenstone, J., Rosenheim, B., Harrison, C.G.A., Grammer, G.M., and McNeill, D.F., 2002, Intra-annual variation in the stable oxygen and carbon isotope and trace element composition of sclerosponges, Paleoceanography, v. 17, no. 3, 1045, doi:10.1029/2000PA000622, p. 17.1-17.12. 
5. Grammer, G. M., Harris, P. M., and Eberli, G. P., 2001, Carbonate platforms: exploration and production scale insight from modern analogs in the Bahamas, invited paper, The Leading Edge (Society of Economic Geophysicists), vol. 20, p. 252-261.