Colby College
Department of Geology
Faculty and Staff

Academic Year 2016-2017




Dr. Tasha L. Dunn

Clare Booth Luce Assistant Professor of Geology
Ph.D., University of Tennessee
Staff Directory Web Page


Dr. Dunn joined the Colby faculty in the spring of 2014. A mineralogist and petrologist with broad interests, her research has focused on Martian geology and primitive meteorites. In the fall term, she is teaching one lecture section of Earth and the Environment (GE141) and the majors course in Mineralogy (GE225). In the spring term, she will be teaching an advanced majors course in Igneous and Metamorphic Petrology (GE332) and coordinating the Geology Seminar (GE391).



Dr. Robert A. Gastaldo

Whipple-Coddington Professor of Geology
Ph.D., Southern Illinois University, Carbondale
Staff Directory Web Page



Dr. Gastaldo joined the Colby faculty as the inaugural Whipple-Coddington Professor of Geology and Department Chair in 1999. Dr. Gastaldo came to Colby with an international reputation in paleobotany, sedimentology and taphonomy, and is a Fellow of the Geological Society of America. He stepped down after thirteen years as Chair at the end of June, 2012.
In 2016-2017, he is will be teaching a majors course in Sedimentation and Stratigraphy and coordinating the Geology Seminar (GE391). In the spring term, he'll be teaching Deep Time Planet Earth (GE 142) and an advanced majors course in The Record of Life on Earth (GE351).


Dr. Robert E. Nelson
Professor of Geology
Ph.D., University of Washington (Seattle)
Staff Directory Web Page


Dr. Nelson is teaching one of the two lecture sections of Earth and Environment (GE141) and a majors W3 (writing) course in Deglaciation History of Central Maine (GE494) in the fall semester, a non-majors lecture course The Earth in Revolt (a contribution to the campus Humanities theme of Revolutions) (GE197) in JanPlan, as well as one of the two lecture sections of Earth and Environment (GE141) and Principles of Geomorphology (GE254) in the spring semester. The senior member of the Department, he joined the Colby faculty in 1982, and was Chair from 1990-1999. Spring, 2017, will be his last active semester teaching; he will be on sabbatical in 2017-18, following which he will retire.



Dr. Bruce F. Rueger
Visiting Assistant Professor of Geology
Ph.D., University of Colorado
Staff Directory Web Page


Dr. Rueger has been with the Department since 1984, and has been Visiting Assistant Professor since 2003, prior to which he was Senior Teaching Associate. In spring, 2016, he was presented the Charles Bassett Award for Excellence in Teaching, by vote of the Senior Class.
He will be teaching the four laboratory sections for Earth and Environment (GE141) in the fall semester. In JanPlan, he'll be offering Geology of the National Parks (GE111). In the spring, he'll be instructing one lecture section of Earth and the Environment (GE141) as well as one of the four laboratory sections for the course.



Dr. Walter A. ("Bill") Sullivan, Department Chair
Associate Professor of Geology [on sabbatical, fall term]
Ph.D., University of Wyoming

Staff Directory Web Page


Dr. Sullivan came to Colby upon completion of his Ph.D. at the University of Wyoming in the fall of 2007, and was tenured as a permanent member of the faculty in 2014.
Dr. Sullivan is on sabbatical leave for the fall term, but will be teaching Structural Geology (GE231) in the spring, as well as one of the four laboratory sections of Earth and the Environment (GE141).



Mr. Mel Croft
Teaching Associate in Geology
M.S., Florida State University
Staff Directory Web Page


Mr. Croft will be instructing two of the four laboratory sections of Earth and Environment (GE141) in the spring term. A retired petroleum geologist with Chevron, Inc., he has been a valued and regular contributor to Departmental programs since the spring of 2008.




Ms. Alice M. Ridky
Administrative Secretary Extraordinaire
Staff Directory Web Page


Alice Ridky keeps the Department of Geology (as well as the Department of Physics and Astronomy) on a steady keel, maintaining and ordering supplies and equipment, coordinating student workers, typing exams and specialized documents, keeping track of Departmental budgets and records, answering student questions, guarding the Departmental supply of M&Ms, and handling unexpected emergencies with aplomb and expertise. She joined the Department in 1983.



EMERITUS FACULTY


Dr. Donald B. Allen
Professor of Geology, Emeritus
Ph. D., University of Illinois



Dr. Allen formally retired at the end of the 2006-2007 academic year, having joined the Colby faculty in the fall of 1967 and serving as Chair from 1982-1990. An economic geologist, mineralogist and petrologist, he has been the principle architect in the Department of analytical links with the Department of Chemistry. He remains a regular presence in the department and periodically still assists students working on independent research projects.




Dr. Harold R. Pestana

Professor of Geology, Emeritus
Ph.D., University of Iowa


Dr. Pestana joined the Colby faculty in 1959 and retired in 1996, establishing the Bermuda program which is continued by Bruce Rueger - the first foreign-study program in the sciences at Colby. He remains active in his retirement, and lives in Waterville. (Photo taken on one of the first Bermuda programs.)




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