Britta Jensen, PhD

Area of Study / Keywords

Quaternary geology paleoenvironments volcanology tephrochronology

About

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

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.

Teaching

I regularly teach EAS 100/201 in the Fall Semester and EAS 110 (Field School) and EAS 457 in the Winter.

Currently I am not actively recruiting any graduate students or post-doctoral fellows, but if you are interested in joining our group and have an idea, please reach out. Funding can always be a challenge, but if you have a strong record and ideas about what you would like to research take a look at the following opportunities . If you think one may work for you, be in touch:

Canadian citizens MSc (NSERC CGS-M)

Canadian citizens PhD (NSERC PGD-D or CGS-D)

Canadian and International PhD (Izaak Walton Killam Memorial Scholarship)

Canadian and International PhD (Vanier CGS)

Canadian citizens Post-doctoral fellowship (NSERC PDF)

Canadian and International PhD (Izaak Walton Killam Memorial Postdoctoral fellowship)

Banting Post-doctoral fellowships are also available to all citizens but please be aware these are incredibly competitive (all these awards are, but these are next level) and difficult to obtain. An exceptional publication record and a project that can easily be shown to be high impact are essential.

EAS 100 - Planet Earth

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 200 or 201.

EAS 110 - Earth Science Field School

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]

EAS 205 - Violent Earth: The Geology of Catastrophic Events

Processes and geological evidence of natural catastrophes, such as volcanoes, earthquakes, slope failures, tsunamis, floods, extraterrestrial impacts, and other rapid environmental changes. Natural hazard risk in the context of geological time. Prerequisite: Any 100-level Science course. [Faculty of Science]

EAS 457 - Global Change

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]

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