Geosciences Colloquium Series: 2022-2023

This year's colloquium series will consist of a mixture of researchers across the University of Arizona along with visiting scientists as well! The colloquium series will be conducted in the Gould-Simpson “Fishbowl” (2nd floor) from 4-5PM on Thursdays. There will be a Zoom option as well to tune in:

Schedule is subject to change.

Organized by Kaustubh Thirumalai and Mauricio Ibañez-Mejia.

Geosciences Colloquium Series Spring 2024




January 11, 2023

Dr. Peter Decelles (Professor, Tectonics, Stratigraphy and Sedimentology)

"Why the Central Andes are Bigger than the Himalaya"

Geosciences Colloquium Series Fall 2023




August 24, 2023 

Dr. George H. Davis (Regents' Professor Emeritus, Geosciences)

"The Geological home of Zeus on Mt. Lykaion, Greece, and the Vibes He Brought to the Montaintop"

August 31, 2023
Dr. Frankie Pavia  (Stanback Postdoctoral Scholar, CalTech)


September 7, 2023 C2C Showcase (Kaustubh Thirumalai, Assistant Professor, Geosciences & Andrew Cohen, Professor, Geosciences) Clouds 2 Core Discussion: NSF-REU at UA GEOS - lessons from 2023 and looking ahead for 2024
September 14, 2023 Dr. Paul Asimow (Eleanor and John R. McMillan Professor of Geology and Geochemistry, CalTech) "Compositional variation within granitoid plutons — what does it mean?"
September 21, 2023
Seminar - Dr. Elias Bloch (Researcher/Scientist, University of Arizona Lunar & Planetary Laboratory) "Multispecies diffusion in garnet and zircon and implications for applications of diffusion data to natural systems"
September 28, 2023
Dr. Madeline Lewis (Assistant Professor, University of Wyoming) "To erupt or not to erupt: Evolution of magma storage conditions before and after caldera-forming eruptions"
October 5, 2023

Dr. Samantha Bova (Assistant Professor, San Diego State University)

"Common modes of western Pacific hydroclimate variability across the last two interglacials"

October 12, 2023 Dr. Laura Kerber (Research Scientist, Jet Propulsion Lab, California Institute of Technology)

"Lavas on the Moon: Insights, Challenges, and Opportunities for Future Exploration"

October 19, 2023

*** No Colloquium (GSA) ***

October 26, 2023 Dr. Andrés Echaurren (Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales)

"Orogenic growth and magmatic arc flareup during the Cretaceous evolution of the North Patagonian Andes"

November 2, 2023 *** No Colloquium ***


November 9, 2023 Dr. Sean Gulick (Research Professor, University of Texas at Austin)

"Life and Death by Impact: Drilling for Clues"

November 16, 2023 Alan Rooney (Assistant Professor of Earth and Planetary Sciences, Yale University)


November 23, 2023 *** Thanksgiving Holiday  ***


November 30, 2023 Dr. Aaron Velasco (Professor, UTEP)

"Using collective impact to change how we conduct geoscience and broaden participation"

December 1, 2023 Seismology Brown Bag Talk The 2017 Mw 8.2 Tehuantepec, Mexico earthquake: Using Machine Learning and a RAPID network to enlighten the rupture characteristics.
December 6, 2023 Dr. Prosenjit Ghosh (Professor, Indian Institute of Science) Chasing the thermal state of the Indian Ocean during theMiocene using carbonate-clumped isotope thermometry
December 7, 2023 *** Reading Day ***


Geosciences Colloquium Series Spring 2023



January 19, 2023 Dr. Mike Eddy (Purdue)

"Hunting for Fossil Magma Reservoirs in the Geologic Record"

January 26, 2023
Dr. Laurent Jolivet

"Hot vs cold Mediterranean MCCs and syn-kinematic granite emplacement"

February 2, 2023

Jean Lynch-Stieglitz (Professor, Georgia Tech)

"The North Atlantic Nutrient Stream: A 20,000 Year Perspective"
February 8, 2023 Jay Thomas (Associate Professor, Syracuse University, and MSA Distinguished Lecturer) "Out of (chemical) equilibrium and into metamorphic depths: mineral inclusions in garnets and elastic thermobarometers reveal true crystallization depths"
February 16, 2023
Liviu Giosan (Geoscientist, Woods Hole Oceanographic Institution)

"When the desert was a lake: Tectonics, climate, river piracy and hominids in the Kalahari"

February 23, 2023
Dr. Patrick A. Rafter (University of California, Irvine)

"Global reorganization of deep-sea circulation and carbon storage after the last ice age"

March 7, 2023

Dr. Cisco Werner (Head of NOAA Fisheries)

"Climate and Fisheries: Next steps and challenges within an Earth System framework"
April 13, 2023

Dr. Paul Chamberlain (Postdoctoral Scholar, Scripps Institution of Oceanography)
Brown Bag Seminar 12:00-1:00pm
Gould-Simpson Room 228A

Dr. Zachary Michels (Manager, SEM Lab)
Gould-Simpson Room 228A

"Lagrangian Trajectory Prediction for the HyperNAV Ocean Color Satellite Calibration Platform"

"Rates without dates – filling the gap with microstructure"

April 27, 2023

Carolina Mallol (Associate Professor,Universidad de La Laguna, Spain)

"Climate-human interactions reconstructed from the microstratigraphic and biomolecular archaeological record"
May 4, 2023 No Speaker


Geosciences Colloquium Series Fall 2022

September 1, 2022
Dr. Annie Bauer (Assistant Professor, Department of Geosciences; University of Wisconsin-Madison)

The tectonic regimes of the earliest continents


September 8, 2022
Dr. Lynn Soreghan (David L. Boren Professor & Director, and Eberly Family Chair of Geosciences; University of Oklahoma)

"Dust and Loess in Equatorial Pangaea"


September 15, 2022

Dr. Pranabendu Moitra (Research Scientist, Department of Geosciences, University of Arizona)

"Causes and consequence of violently explosive basaltic eruptions"

September 22, 2022
Hartwig Fremmel (Professor; University of Würzberg)

"Paleoclimate and Mineral Deposits"

September 29, 2022
Dr. Advait Jukar (Lecturer, Department of Geosciences, University of Arizona)

"Climate, humans, and the assembly of the South Asian herbivore guild"


October 6, 2022
Dr. Rachel E. Bernard (Assistant Professor of Geology; Amherst College)

"Complexities of olivine and orthopyroxene creep and implications for mantle seismic anisotropy"


October 13, 2022

No Talk This Week

October 20, 2022

Sarah Ivory (Asst. Prof.; Penn State University)

"Spatial and temporal dynamics of abrupt change in tropical African forests"


October 27, 2022

Aleisha Johnson (Postdoctoral Researcher; University of Arizona"

"Titanium isotopes as a new tool for probing the formation and evolution of the continental crust"


November 3, 2022
 Yang Song (Asst. Prof; Hydrology & Atmospheric Sciences (HAS); University of Arizona)

 "Mitigating uncertainty in predicting climate-carbon feedback from the perspective of biosphere-climate interaction. "


November 10, 2022
 Oliver Jagoutz (Professor; MIT)

 "Understanding the connection between tectonics and climate variability from studying the Himalayan collision"


November 17, 2022

Dr. William Struble

“Landslides across scales: Bedrock landslide initiation mechanisms and landscape evolution by debris flows."


November 24, 2022
Thanksgiving Holiday


December 1, 2022

Dr. John Grotzinger (Harold Brown Professor Of Geology; CalTech)

 "Stratigraphy, Sedimentology, and Diagenesis of a Martian Lacustrine Deposit, Gale Crater, Mars"

December 8, 2022

Susan Lieb  (Curator/Collections Manager;  Alfie Norville Gem & Mineral Museum)

 "Temporal Evolution of the Rattlesnake Creek terrane and Implication of Jurassic Construction of Crust in the Western United States"


Geosciences Colloquium Series Spring 2022

Date SPeaker TITLE
January 20, 2022

Dr. Jeff Warren 

(Executive Director, North Carolina Policy Collaboratory, 

& Professor of the Practice, Department of Public Policy,

at The University of North Carolina at Chapel Hill)

Science for Hyperpartisan Times

 Not Available

January 27, 2022 Dr. Andrew Walters ( Postdoc, The University of Arizona)

Orbital forcing of western North American hydroclimate during the early Eocene greenhouse.

 Watch on You Tube

February 3, 2022 Dr. Gilby Jepson(Postdoc, The University of Arizona)

The relationship among climate, tectonics, and erosion

 Watch on You Tube

February 10, 2022 Dr. Sarah Lambart (Assistant Professor, The University of Utah)

Melt2Mantle: How to identify the mantle heterogeneity

Watch on You Tube

February 16, 2022 Dr. Doug Wiens (Robert S. Brookings Distinguished Professor, Washington University)

The water cycle in subduction zones.

Watch on You Tube

February 17, 2022

Dr. Cailey Condit(Assistant Professor, University of Washington)

The geology, petrology, and rheology of deep slow slip subduction zones.

Watch on You Tube

March 3, 2022  Dr. Melanie Barboni (Assistant Professor, Arizona State University)

 "Discovering lost Lunar magmas using Apollo zircons"

Watch On YouTube

April 21, 2022  

Dr. Yair Rosenthal(Distinguished Professor, Rutgers University)

"Neogene climate change: revisiting the silica weathering hypothesis"

Watch on You Tube

April 28, 2022  

Dr. Sarah George(Postdoc, The University of Arizona)

"Upper crustal responses to ridge subduction and flat slab subduction"

Watch on You Tube

May 5, 2022  

Dr. Frances Rivera-Hernández (Georgia Tech)

"From Grains to Landscapes: Reconstructing Martian Environments at Multiple Scales "

Watch on You Tube

May 12, 2022  

Dr. Chris Brierley (Department of Geography, University College London)

"Accessing simulations run for the IPCC, especially from the Paleoclimate Model Inter-comparison Project (PMIP)  "

Watch on You Tube

Geosciences Colloquium Series Fall 2021

August 26, 2021
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September 2, 2021
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September 9, 2021
Kaustubh Thirumalai (UA GEOS)

Methane, Monsoons, and Milankovitch Modulation of Millennial-scale Variability

 Watch on You Tube

September 16, 2021
Jennifer McIntosh (UA HAS)

"Geologic evolution of groundwater flow systems & implications for subsurface microbial life"

Watch on You Tube

September 23, 2021
Jessica Tierney (UA GEOS)

"Assessing climate change: The process and key findings of the IPCC sixth assessment report"

Watch on You Tube

September 30, 2021
Zachary Michels (UA GEOS)

"Microtectonics of Natural and Experimental Tectonites"

Watch on You Tube

October 7, 2021

 Kevin Anchukaitis (UA Tree-Ring)

"The woods fill up with snow: multiple paths towards reconstructions of western North American snow droughts"

October 14, 2021
 Pierre Haenecour (UA LPL)

 "Simulations of Thermal Processing of Volatile-rich Materials on the Surface of Asteroids"

Watch On YouTube

October 21, 2021

Matthew Lachniet (UNLV, Las Vegas)


“A Surface Water Isoscape from New Zealand: A Powerful Tool for Paleoclimatic Interpretation”


October 28, 2021
 Bryan Shuman (UWyoming)

"The Dynamic Hydroclimate of North America during the Holocene"

Watch on Yo Tube

November 4, 2021
Mauricio Ibañez-Mejia (UA Geos)

“The role of zircon crystallization in the zirconium isotope record of magmatic systems”

November 11, 2021
Veteran's Day Holiday

“In observance of Veteran's Day, there is no talked scheduled.”

November 18, 2021
 Brayn Black (UA Tree-Ring)

“Multicentennial perspectives on extreme climate and natural disasters in the Northeastern Pacific”

Watch On YouTube

December 2, 2021
 Katherine Giles (UTEP, El Paso)

"New Paradigms in the Paradox Basin, UT & CO: Re-evaluating the History of Diapirism Based on the Latest Concepts in Salt Tectonics"

Watch on YoUTube


For list of Spring 2021 talk titles and video recordings, please click here.