Terrestrial Paleoclimate and Tectonics members


Katie in the field Katie Snell [email]
Assistant Professor

Postdoc, Caltech 2011-2014
PhD, UC Santa Cruz 2011
BA, Colorado College 2002

Katie is interested in terrestrial paleoenvironmental reconstruction, paleoaltimetry, diagenesis and modern depositional processes. She uses a range of sedimentology and stable isotope geochemistry tools to address these questions.

Ashley Ashley Maloney [email]
Research Associate and CUBES-SIL Lab Manager, 2022-Present

Simons Postdoctoral Fellow, Princeton University 2018-2022
MS & PhD, University of Washington 2018
BS & MS, Stanford University 2005

Ashley will be joining us as the new CUBES-SIL lab manager in Fall 2022; more updates soon!

Rachel Rachel Havranek [email]
PhD candidate

BA, Pomona College

Rachel is interested in how the hydrologic cycle is recorded by the stable isotopes of pedogenic carbonate. Currently, she is testing a system that can automatically sample and store soil water vapor to better understand pedogenic carbonate formation in the modern environment.

Juliana Juliana Olsen-Valdez [email]
PhD candidate

BA, Lawrence University

Juliana has a deep appreciation for the earth, nature, and being outdoors. Her research interests include paleoclimate and paleoenvironmental change, specifically during the Paleocene-Eocene Thermal Maximum. This coming year, Juliana will begin paleoclimate studies on the Sheep Pass Formation in east-central Nevada.

Haley Brumberger [email]
PhD sutdent

BA/MS, Wesleyan

Haley will be joining the lab in Fall 2022; stay tuned for updates!

Lab Alumni


Anne Anne Fetrow [email]
PhD, CU Boulder 2022

BA, University of Puget Sound

Anne is a visiting Assistant Professor at Bates College for the 2022/2023 academic year, then will begin an NSF Postdoctoral Fellowship at the University of Michigan in Summer, 2023.

Lina Lina Perez-Angel [email]
PhD, CU Boulder 2022

BS, Universidad de Los Andes

Lina is currently a Voss Postdoctoral Fellow at Brown University.

Brett Brett Davidheiser-Kroll [email]
Research Associate and CUBES-SIL Lab Manager 2015-2021

PhD, University of Glasgow 2014
MS, Vrije Universiteit Amsterdam 2011
BS, UC Berkeley 2006

Brett is now working for Thermo Scientific in the IRMS division.

Dave David Colwyn [email]
NSF Postdoctoral Fellow, CU Boulder 2018-2020

PhD, Yale University

BA, Carleton College

Vikki Vikki Crystal [email]
MS, CU Boulder 2019

BA, Colorado College

Vikki is back in Colorado, working as a museum specialist for the USGS in Lakewood.

Anna Anna Todd [email]
BA, summa cum laude, CU Boulder, 2019


Anna is currently a law student at Harvard University.

Miquela Miquela Ingalls [email] [website]
Postdoc, CU Boulder, 2017-2018

PhD, University of Chicago, 2017
BS, University of North Carolina

Miquela went on to a Barr Postdoctoral Fellowship at Caltech, and is currently an Assistant Professor at Penn State.

Alejandro Alejandro Murillo [email]
BA, cum laude, CU Boulder, 2017


Alejandro is back in Boulder, working as the Boulder County Liaison for the climate justice non-profit, Boulder.Earth.

Cara Cara Lauria [email]
MS, CU Boulder 2017

BS, College of Charleston

Cara is currently a biological technician for the USGS in Moab, UT.