David (Duff) P. Gold, Ph.D., P.G.
Professional education includes a B.Sc. (1953), B.Sc. (Hons) (1954), M.Sc. (1958) from the University of Natal, South
Africa and a Ph.D. from McGill University, Montreal, Canada (1963). Gold also has taken accredited short courses in
fractals and chaos theory, diamond exploration, and landslide technology and control. Gold is a Licensed Professional
Geologist in the state of Pennsylvania. He co-teaches short courses for the National Ground Water Association on
“Fracture Trace and Lineaments Analysis: Application to Ground Water Resource Characterization and Protection” with
Richard R. Parizek.
Gold worked as a geologist for Union Corporation in Southern Africa, where he gained experience in mining geology, and
in exploration for gold, platinum and torbanite. Other work experience includes regional geological mapping on the
Canadian Shield (Grenville, Nickel Belt, and in the Labrador Trough (Ungava and Schefferville)) for Quebec Department
of Mines, and U.S Steel Corp. and in diamond exploration for Superior Minerals and BHP in Wyoming and the Archangel
Shield in Russia.
He has developed an expertise in alkalic rocks (carbonatites, kimberlites and lamproites) from thesis work on the Oka
Carbonatite Complex, Canada, and in Meteorite Impact phenomena from investigations of sites in Canada, for the
Dominion Observatory, Ottawa, and in Africa for NASA. Gold has taught courses in Economic Geology, Geology of
Industrial Minerals and Geology of Construction Materials at Penn State University. Current activities include
geological characterization of an archaeological site in Egypt, detailed mapping and resource evaluation around active
aggregate quarries in Pennsylvania, and the characterization and risk assessment of excavating into pyritic deposits
during highway construction in Pennsylvania for PennDOT.
Arnold G. Doden, Ph.D., P.G.
Doden earned a bachelor's degree in Geology from the University of Northern Iowa (1983), an M.S. in Geology from
Iowa State University (1988), and a Ph.D. in Geosciences from Penn State University (1997). He also received a
certificate in Geographic Information Systems (GIS) from Penn State and is a Licensed Professional Geologist in the
state of Pennsylvania. Doden also has taken accredited short courses in diamond exploration and landslide technology
and control. As a visiting professor at Susquehanna University, Doden taught courses in Waste Management,
Environmental Geology, Environmental Hazards, and Structural Geology & Field Methods. He also assisted with the
instruction of summer geology field school and courses in field methods while attending graduate school.
Doden has been leading GMRE's efforts in producing bedrock geology maps of 7.5 minute quadrangles in central
Pennsylvania. These projects are part of the State Map program supported by the PA Bureau of Topographic and
Geological Survey and the U.S.G.S.
Doden's research background is in igneous petrology and mineralogy, with an emphasis on kimberlites and other diamond
source rocks. He has conducted field studies on various topics in Pennsylvania, Virginia, Iowa, Minnesota, Montana, and
Iceland. Doden provides the CAD and GIS services offered by GMRE in its production of geologic maps,
cross-sections, and related materials.
Licensed Professional Geologists in Pennsylvania
Geologic Mapping and Resource Evaluation, Inc.