PhD Geosciences at University of Arizona

Programme overview

The program of study for a doctorate in Geosciences follows a four-year, research-based track that explores the nature, genesis and history of Earth and its crust, and the evolution of the environment and biota at Earth's surface. The program's interdisciplinary approach to research in the geosciences means you can create a multifaceted academic strategy that incorporates myriad fields of investigation, including climate dynamics, paleolimnology, tectonics, dendrochronology and mineral resources.

Faculty: College of Science | Duration: 6 years / 63 units | Study mode: full-time | Location: Tucson, AZ, United States

What you will study

Minumum credits : 63 units total (36 units of course work for major, 9 units minimum for the minor, and 18 units of Dissertation, GEOS 920) Core coursework : GEOS 595A, Topics in Geosciences, 1 unit, taken for two semesters, typically in student's first year

Official programme page

Application information

Entry requirements

Graduate College minimum (applies to all programmes; departments may add requirements): regionally accredited bachelor's degree or comparable international degree and a minimum 3.00 GPA for degree programmes on a 4.00 scale. The Graduate College does not require the GRE, though individual programmes may. Programme-specific requirements are listed in the Graduate Admissions Guide.

Domestic applicants: USD 15,500 a year (2026-27). FY 2027 published base tuition for the Resident Graduate rate band, which applies to main-campus graduate programmes. Excludes mandatory fees, college fees, program fees and differential tuition, housing and meal plans. Source

International applicants: USD 35,800 a year (2026-27). FY 2027 published base tuition for the Non-Resident Graduate rate band, which applies to main-campus graduate programmes. Excludes mandatory fees, college fees, program fees and differential tuition, housing and meal plans. Source

Spring semester begins January 13 and fall semester begins August 23 for undergraduate international students; for graduate students spring begins January 14 and fall August 25.

Apply through the official page: https://grad.arizona.edu/admissions

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