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Professor John Higgins' primary research interest is the evolution of the carbon cycle and the global climate system throughout Earth's history. His focus includes the processes that control the chemical composition of seawater and how these processes have changed over geologic timescales. He studies how the chemistry of carbonate sediments is affected by processes occurring post-deposition, including early diagenetic recrystallization, dolomitization, and hydrothermal alteration. The tools employed by Professor Higgins to study these processes include numerical models and chemical isotopic analysis, particularly of traditional stable isotopes such as oxygen and carbon, as well as new isotope systems including magnesium, calcium, and potassium.
GRE scores are not accepted. Ph.D. is the primary degree; students are not required to hold an M.S.E. prior to admission.