Gary, M.O., 2001, Los Cenotes de Rancho La Azufrosa, Association of Mexican Cave Studies Activities Newsletter, Number 24, p. 31-38. (.pdf - 1351k)

Gary, M.O., 2002, Understanding Zacatón:  Exploration and Initial Interpretation of the World's Deepest Known Phreatic Sinkhole and Related Karst Features, Southern Tamaulipas, Mexico, Karst Frontiers, Karst Waters Institute Special Publication 7, p. 141-145. (.pdf - 836k)

Gary, M.O., 2002, Zacatón Update,  Association of Mexican Cave Studies Activities Newsletter, Number 25, pp. 122-123. (.pdf - 355k)

Gary, M.O., 2002, Field Research in Tamaulipas, Mexico, Works to Develop New Methods of Aquifer Mapping, The University of Texas at Austin Geology Foundation Newsletter, Vol. 52, p. 19. (.pdf - 204k)

Gary, M.O., Stone, W.C., 2002, Creating a multi-sourced, ultra-high resolution 3-D karst aquifer model using LADAR, SONAR, and earth resistivity datasets, Proceedings of Symposium on Terrain Analysis for water resources applications, University of Texas at Austin Center of Research in Water Resources.

Gary, M.O., Sharp, J.M.Jr., Havens, R.H., Stone, W.C., 2003, Sistema Zacatón: Identifying the Connection Between Volcanic Activity and Hypogenic Karst in a Hydrothermal Phreatic Cave System, Geo 2, Section of Cave Geology and Geography of the National Speleological Society, Volume 29, No. 3 & 4, p. 1-14.

Gary, M.O., Sharp, J.M.Jr., Caramana, G., Havens, R.H., 2003, Volcanically Influenced Speleogenesis: Forming El Sistema Zacatón, Mexico and Pozzo Merro, Italy, the Deepest Phreatic Sinkholes in the World, Geological Society of America, 2003 Seattle Annual Meeting, Topical Session T66. 

Gary, M.O., 2004, Preliminary Analysis of Microbial Habitats and Geochemical Environments of Sistema Zacatón, Mexico, Geological Society of America, 2004 Denver Annual Meeting, Paper No. 106-13.

Gary, R.H. 2005. Anthropogenic Activities and Karst Landscapes: A Case Study of the Deep, Thermal, Sulfuric Karst System in Tamaulipas, Mexico. University of Texas at Austin Masters thesis.

Gary, M.O. Fairfield, N., Stone, W. C., Wettergreen, D., Kantor, G., Sharp, J.M.,  2006, DEPTHX: Underwater mapping and imaging of deep karst shafts, Association of American Petroleum Geologists Annual Convention, April 9-12.

Gary, M.O., Sharp, J.M.,Jr., 2006, Volcanogenic Karstification of Sistema Zacatón, Geological Society of America Special Paper 404, p. 79-89.

Gary, M.O., Halihan, T., Sharp, J.M., Mouri, S., Thorstad, J., 2006, Electrical resistivity imaging of travertine capped sinkholes: Deep lakes with lids, Geological Society of America, 2006 Philadelphia Annual Meeting, Topical Session T65, Paper No. 218-4.

Gary, M.O., Sharp, J.M., Halihan, T., Ramirez Fernandez, J.A., 2007, Mammoth Discovery:  Paleontological and geophysical evidence for timing and sequence of karstification at Sistema Zacatón, Mexico, Geological Society of America Geological Society of America Abstracts with Programs, Vol. 39, No. 3, p. 28, 2007 Joint North-Central, South-Central Sectional Meeting paper No. 25-2.

Gilliam, B. 1995, Deep Diving An Advanced Guide to Physiology, Procedures and Systems, Watersport Publishing, Inc., San Diego, p. 37-47.


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