I am currently a Postdoctoral Fellow in the Department of Earth and Planetary Sciences at Johns Hopkins University with Daniel Viete and Assistant Professor of Earth and Environmental Sciences at the University of Michigan beginning Fall 2020.

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I study the development of Earth's modern and ancient mountain belts and how Earth's tectonic processes have changed through time using geologic mapping, rock and mineral chemistry, radiometric dating, and length scales of chemical and thermal diffusion.

Prospective graduate students for the University of Michigan who are interested in these topics or other aspects of my work can contact me at roholder [at] umich [dot] edu.

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Additional contact info:

holder [at]  jhu [dot] edu     ORCID     researchgate     google scholar       instagram:@thats.so.meta

Background photo: Me, looking at Lake Vanda and Mt. Odin, across the Wright Valley, Southern Victorialand, Antarctica: Black lines along lake shore are 500 million year old dikes, thick dark layer going accross Mt Odin is a 180 Million year old sill (one of the Ferrar sills). photo credit Demian Nelson.