Greg Hirth

James Gregory "Greg" Hirth (born June 4, 1963) is an American geophysicist, specializing in tectonophysics. He is known for his experiments in rock deformation and his applications of rheology in development of models for tectonophysics.

Biography Greg Hirth as a boy and teenager enjoyed the outdoors in the woods of Ohio and the mountains of Colorado. He graduated in 1985 with a B.S. in geological sciences from Indiana University. At Brown University, he graduated in geological sciences with a master's degree in 1987 and a Ph.D. in 1991. His Ph.D. thesis was supervised by Jan Tullis. For the academic year 1991–1992, Hirth was a postdoc in the department of geology and geophysics at the University of Minnesota. There his supervisor was David L. Kohlstedt. In the department of geology and geophysics of the Woods Hole Oceanographic Institution (WHOI), Hirth was a postdoc in 1993, an assistant scientist from 1994 to 1998, and an associate scientist from 1998 to 2007 (with tenure from 2001). In the Department of Earth, Environmental and Planetary Sciences of Brown University, he was an associate professor from 2007 to 2009 and was appointed to a full professorship in 2010, which he currently holds. From 2015 to 2020, he chaired his department. He has held visiting positions at Caltech (fall 1999), France's University of Montpellier (spring 2007), and Rice University (spring 2011). in Oman, Josephine County, Oregon, Washington State's Cascade Mountains, the region near Big Jim Mountain in the Chiwaukum Mountains, and Trinity County, California. He has also done geological fieldwork in Central Australia (1993), Norway (2009), and California's Mecca Hills (2021). Hirth was on three research cruises to the Southwest Indian Ridge. has been cited more than 1750 times. Hirth is the author or co-author of more than 25 articles that have been cited more than 100 times each. effects of melt and creep in the mantle on the rheology of the aggregate, and the effects of grain size evolution on geophysical processes. He and his colleagues have used experimental and theoretical rheology in constructing models of the oceanic lithosphere, the Iceland hotspot, and several other geophysical phenomena. He received the George P. Woollard Award from the Geological Society of America (GSA) in 2018. Greg Hirth married Ann E. Mulligan, whom he met at Brown University.

Selected publications Articles

See plagioclase and mylonite; Hirth supervised the Ph.D. thesis of Luc Mehl,

(See diapir.)

Books