Colby College
Department of Geology
Faculty and Staff

Academic Year 2015-2016




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 coordinating the departmental seminar series (GE391) and teaching a new advanced majors course in Planetary Geology (GE381). In the spring term, she will be instructing one lecture section of Earth and the Environment (GE141) and the majors course in Mineralogy (GE225).



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 2015-2016, he is teaching a restructured majors course in Sedimentation and Stratigraphy (GE256) in the fall term, with two laboratory sections. In the spring term, he'll be instructing Deep Time Planet Earth (GE 142) and coordinating the geology seminar series (GE391).


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 course in Glacial and Quaternary Geology (GE354) in the fall semester, 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.



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


Dr. Rueger is teaching one section of Earth and the Environment (GE141) and two of the four laboratory sections for the course in the fall semester. In JanPlan, he'll be offering Geology of Bermuda (GE279). In the spring, he'll be instructing one section of Earth and the Environment (GE141) as well as two of the four laboratory sections, plus Geologic Environments of the Marine Realm (GE378). He has been with the Department since 1984, and has been Visiting Assistant Professor since 2003, prior to which he was Senior Teaching Associate.



Dr. Walter A. ("Bill") Sullivan, Department Chair
Associate Professor of Geology
Ph.D., University of Wyoming

Staff Directory Web Page


Dr. Sullivan will be teaching Structural Geology (GE231) in the fall term, as well as two of the four laboratory sections of Earth and the Environment (GE141). In the spring, he'll be instructing one of two lecture sections for Earth and the Environment" (GE141) and the senior capstone course Topics in Geosciences (GE494). Prof. Sullivan is now beginning his eighth year at Colby.



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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