Daniel O Breecker

Daniel O Breecker
Associate Professor, Department of Geological Sciences, Jackson School of Geosciences

Email: breecker@jsg.utexas.edu
Work: +1 512 471 6166
Office: JGB
Mailcode: C9000

I am interested in pursuing a process-based understanding of the critical zone with a focus on the formation of calcium carbonates in soils and caves and the stabilization of organic carbon in soils. Goals include improving and developing paleoclimate proxies and better understanding changes in climate and the carbon cycle across a range of timescales.

Areas of Expertise

The Breecker Group studies biogeochemical processes occurring at or near the land surface. We study soils and paleosols, caves and stalagmites, and other materials, such as volcanic glass, that give us insight into ancient Earth. We study timescales ranging from seasonal cycles to hundreds of millions of years. We use observations, mathematical models and both laboratory and field-based experiments to address an evolving range of questions. To learn more about the research we are doing, please see our research group website.


Timothy Gallagher
My research centers on developing a more complete understanding of the soil carbon cycle and the role that soils play in the global climate system. By studying the geologic record, I am able to refine our understanding of Earth History and inform responses to modern challenges, such as climate change and the intensification of land-use on a global scale. I study...

Elizabeth Cassel, now at the University of Idaho
Liz is advancing the understanding of the paleoelevation of the western United States and the Western Cordillera in South America. She is a leader in the use of felsic volcanic glasses to determine the past elevation of Earth's land surface.

Graduate Students

Evan J Ramos , Ph.D., expected 2021 (Co-supervisor)
My research incorporates stable isotope geochemistry, reactive transport modeling, field work, and hydrology to understand the geologic carbon cycle. Whether deep in the crust or at the Earth's surface, I see the physics and chemistry of fluid-rock interactions as a unifying lens to probe whole-Earth geochemical cycles. I have worked on several projects related to skarn formation, namely on how...

Lily Jackson (Committee Member)
My research has focused on the tectonic history of the northern Andes, including timing and magnitude of major paleo-elevation changes affecting the northern Andes of Peru and Ecuador. My methods include provenance analysis such as detrital zircon U-Pb geochronology; stable isotope geochemistry to infer paleoclimate and paleoelevation; and other traditional methods in sedimentology.

Lily Serach (Supervisor)

Natasha Sekhon (Co-supervisor)
Paleoclimatology & Isotopic Geochemistry

Peter Carlson, Ph.D., 2018 (Co-supervisor)

Sol Cooperdock, M.S., 2017 (Supervisor)

John Warden, Ph.D., 2016 (Co-supervisor)

Tim Charlton, M.S., 2016 (Co-supervisor)

Chris Cacciatore, M.S., 2016 (Supervisor)

Michael Patson, M.S., 2015 (Supervisor)

Brandon Okafor, M.S., 2014 (Supervisor)

Marlo Gawey, M.S., 2013 (Supervisor)

Lacey Pyle, M.S., 2012 (Supervisor)

Nate Meyer, M.S., 2012 (Supervisor)

Kyle Meyer, M.S., 2012 (Co-supervisor)

2019Fall GEO 401 Physical Geology
2019Summer GEO f660B Field Geo-Tx/Nm/Co/Wy/Mt/Id/Ut
2019Spring GEO 388H Environmental Isotope Geochem
2019Spring GEO 376E Environmental Isotope Geochem
2018Fall GEO 401 Physical Geology
2018Summer GEO f660B Field Geo-Tx/Nm/Co/Wy/Mt/Id/Ut
2018Spring GEO 394 Rsch In Geological Sciences
2018Spring GEO 291 Asian Monsoon
2018Spring GEO 191 Proposal Writing
2017Fall GEO 394 Rsch In Geological Sciences
2017Fall GEO 401 Physical Geology
2017Spring GEO 394 Rsch In Geological Sciences
2017Spring GEO 191 Proposal Writing
2017Spring GEO 388H Environmental Isotope Geochem
2017Spring GEO 376E Environmental Isotope Geochem
2016Fall GEO 394 Rsch In Geological Sciences
2016Fall GEO 401 Physical Geology
2016Spring GEO 394 Rsch In Stbl Isotp Biogeochem
2016Spring GEO 191 Proposal Writing
2015Fall GEO 394 Rsch In Geological Sciences
2015Fall GEO 401 Physical Geology
2015Spring GEO 394 Rsch In Stbl Isotp Biogeochem
2015Spring GEO 191 Proposal Writing
2015Spring GEO 388H Environmental Isotope Geochem
2015Spring GEO 376E Environmental Isotope Geochem
2014Fall GEO 394 Rsch In Stbl Isotp Biogeochem
2014Fall GEO 401 Physical Geology
2014Spring GEO 394 Rsch In Stbl Isotp Biogeochem
2014Spring GEO 191 Proposal Writing