Marcus Gary
Marcus is a State of Texas licensed geologist (No. 10386) and hydrogeologist specializing in investigating
karst forming processes and the implications of karst geology for natural resource management. Marcus received an Associate of Science degree in Marine Technology at the College of Oceaneering, a B.S. degree in hydrogeology and environmental geology at the University of Texas at Austin (UT), and completed his doctorate at UT on defining volcanogenic karst related to deep cave development in 2009. His research has been internationally recognized for investigating one of the world’s deepest underwater sinkholes and interpreting the geologic mechanisms that formed the karst system.For eight years he worked in the Texas Water Science Center of the U.S. Geological Survey, performing numerous tasks related to water resources. Projects included developing methods to quantify spring flow using acoustic technology, monitoring discharge and water chemistry parameters at springs, assisting with a geochemical investigation of the Barton Springs Segment of the Edwards Aquifer, providing diving support for coring and karst monitoring projects, serving as a dive safety officer for the Central Region, performing statewide surface reservoir water quality analysis and designing and implementing a variety of continuous monitoring projects at locations across Texas. His work at Zara since 2007 includes geologic assessments, drainage basin delineation, and dye tracing.
Selected Publications
Los Cenotes de Rancho La Azufrosa
Understanding Zacatón: Exploration and Initial Interpretation of the World's Deepest Known Phreatic Sinkhole and Related Karst Features, Southern Tamaulipas, Mexico
Zacatón Update
Field Research in Tamaulipas, Mexico, Works to Develop New Methods of Aquifer Mapping
Creating a Multi-sourced, Ultra-high resolution 3-D Karst Aquifer model using LADAR, SONAR, and earth resitivity datasets
Sistema Zacatón: Identifying the Connection Between Volcanic Activity and Hypogenic Karst in a Hydrothermal Phreatic Cave System
Volcanically Influenced Speleogenesis: Forming El Sistema Zacatón, Mexico and Pozzo Merro, Italy, the Deepest Phreatic Sinkholes in the World
Preliminary Analysis of Microbial Habitats and Geochemical Environments of Sistema Zacatón, Mexico
Volcanogenic Karstification of Sistema Zacatón
Electrical resistivity imaging of travertine capped sinkholes: Deep lakes with lids
Mammoth Discovery: Paleontological and geophysical evidence for timing and sequence of karstification at Sistema Zacatón