Quaternary geology paleoenvironments volcanology tephrochronology
Welcome to my website.
I am a geologist who works mostly on Quaternary time-scales. I specialize in tephrochronology, which is the study of volcanic ash deposits (tephra) and how they can be used to date and correlated stratigraphic sequences. I also am interested in the extensive aeolian deposits in the interior of Alaska and the Yukon.
A bit of background. I completed my BSc in Geology at Simon Fraser University in Burnaby British Columbia and my MSc and PhD here at the University of Alberta. I completed an NSERC post-doctoral fellowship at Queen's University Belfast in the UK and went on to the Royal Alberta Museum to work in the Quaternary Environments group. As of July 1 2017 I rejoined the Department of Earth and Atmospheric Sciences as an Assistant Professor.
Research interests in volcanic ash:
Volcanic ash deposits found in different environments (e.g. marine, lake, terrestrial, ice) can provide insights into the paleoenvironmental records preserved in those environments and often offer important chronological control.
Distal (>10 km or so from their source) ash deposits can also tell us an important story about volcanic activity from a specific centre or region, supplementing proximal deposits that can often be removed by glaciation or subsequent eruptions.
Understanding eruption histories of volcanoes is important from several different perspectives. We are interested in changes in eruption frequency through time to help us understand the external controls (tectonic, glacial) that might help control the rate of eruptions. There are also potential impacts on climate related to increases in activity. Developing eruptions histories are also integral to understanding the hazard a particular volcano or region may pose to people.
Documenting distal deposits such as their distribution, grain size, and morphology also provides important field data for the ongoing efforts in building models that aim to accurately model ash fall.
Research interests in stratigraphy:
My research has largely been based in eastern Beringia, the unglaciated regions of Yukon and Alaska, which contain extensive deposits of aeolian deposited silts, known as loess.
Loess deposits are fascinating because of they are often linked to glacial cycles and are excellent paleoenvironmental archives. In Alaska these deposits can be as old at ~ 3 million years, providing one of the few records of terrestrial sedimentation for the entire Quaternary.
I am interested in the paleomagnetic characteristics, geochemistry, stratigraphy and sedimentology of these loess deposits and the insights into the Quaternary paleoenvironmental record of the north they provide.
I regularly teach EAS 100/201 in the Fall Semester and EAS 110 (Field School) and EAS 457 in the Winter.
I am currently looking for students to work on a variety of projects, generally related to reconstructing volcanic histories, combining classical proximal physical volcanology and tephrostratigraphy, and correlating paleoenvironmental records.
While there are a number of defined projects available I am also completely open to students coming to me with their own ideas. Please contact me if you are interested.
Introduction to the origin and evolution of the Earth and the solar system. Introduction to plate tectonics and the rock cycle. Simple energy balances and interactions between radiation and the atmosphere, land, oceans, ice masses, and the global hydrological cycle. Evolution of life, biogeography, and global climate in the context of geologic time. The carbon cycle. Human interaction with the Earth. Mineral and energy resources. This course may not be taken for credit if credit has been obtained in EAS 105 or 201.Fall Term 2021
This excursion through the mountains and prairies of Alberta introduces students to the diverse geology and geomorphology of the region. The structure of rocks will be observed, fossils identified, and glacial deposits studied, in order to understand the geological processes that have occurred here over geologic time. Requires payment of additional student instructional support fees. Refer to the Tuition and Fees page in the University Regulations section of the Calendar. Intended for students in their first or second year. Not available to students with previous credit in an EAS field school (EAS 234, 354, or 333). Prerequisite: One of EAS 100, 101, 201, 210 or SCI 100. [Faculty of Science]Winter Term 2022
Major processes of change in the contemporary environment, their history and their interrelationships (climate and sea level change, changes in atmospheric composition, deforestation, desertification, water resource depletion, soil erosion, atmospheric and aquatic pollution); global biogeochemical cycles and their role in environmental change. Prerequisite: One of EAS 208, 225 or 250. [Faculty of Science]Winter Term 2022