Dr. Alan Rooney, Assistant Professor

I am interested in understanding the interactions between tectonics, climate processes and geochemical cycles on a range of time scales. I use radiogenic isotope geochemistry, in particular the rhenium-osmium (Re-Os) geochronometer, Sr and Nd isotopes combined with field-based mapping, sedimentology, stratigraphy and mineralogy to interrogate the rock record of critical transitions in Earth History.

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Dr. Tim Gibson, Postdoc

I am broadly interested in reconstructing the Earth history from its sedimentary record. Specifically my research aims to decipher how interactions between the geosphere and biosphere regulated the Proterozoic environment from 1.2 to 0.8 billion years ago. I am currently investigating various sedimentary basins in Svalbard, arctic Canada, and Greenland through the lens of geobiology. This means that I implement a combination of sedimentology and stratigraphy, hydrocarbon biomarker, stable and radiogenic isotope geochemistry, and geochronology to reveal the geochemical and evolutionary landscape leading up to many pivotol climatic, tectonic, and evolutionary events.

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Alexie Millikin, Graduate Student


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Gryphen Goss, Graduate student

I want to understand how past ice sheets behaved during major climatic shifts. My research involves the application of radiogenic isotope techniques to pinpoint how deglaciation occurred (pulsed/linear), timing, and rate. Major climatic shifts of interests include Mid-Pliocene Warming Period (~ 3 million years ago) and the Mid-Pleistocene Transition (~0.8 million years ago). Specific geochemical techniques I employ include the Re-Os and Sm-Nd isotope systems, with a view to combining these with cosmogenic nuclide dating.



Sam Shipman, graduate student


Sierra Anseeuw, Lab Manager


I manage the day-to-day lab operations in the Rooney Lab. I received my BS in Environmental Geology from Beloit College and my MS in Geology from the University of Buffalo. My research background is in isotope geochemistry and contaminant hydrogeology

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Gone but not forgotten:
Dr. Anne Bauer, Assistant Professor at the University of Wisconsin

My research focuses on the geochemical record and tempo of atmospheric and oceanic oxygenation, Hadean and Archean crustal production and preservation, and analytical technique development in radiogenic and stable isotope geoscience. With new projects I am applying the Re-Os geochronoeter to refine temporal constraints and evaluate the nature of continental weathering during the Paleoproterozoic Lomagundi-Jatuli carbon isotope excursion.

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Dr. Yang Li, Assistant Professor at the institute of geology and geophysics, chinese academy of sciences

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