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Maine Geology: We Learn About Maine's Geological History & What Gems, Minerals and Fossils Are Here


This show is part of our ongoing coverage of topics relating to Maine's bicentennial.

What is the geologic makeup and history of Maine? We find out what geologists know--and how they learn--about Maine's bedrock formations and how periods of erosion, mountain-building,  metamorphism and other activity have led to what we have today. A combination of rock types distinguishes our state, from half a billion years ago until today. We will also hear about the new Mineral & Gem Museum—what they feature, and what gems and minerals are unique to Maine. 


  •  Bob Marvinney, Maine State Geologist
  • William “Skip” Simmons, Research Director Maine Mineral and Gem Museum; University of New Orleans Emeritus Professor of Mineralogy and University Research Professor 

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Cindy helps produce Maine Public's live call-in show Maine Calling, and sometimes hosts the show—as well as the All Books Considered Book Club. Her first foray into journalism after graduating from Columbia University’s Graduate School of Journalism was to intern with CNN in China in the wake of the Tiananmen Square massacre. She then worked in print journalism over the decades, as a factchecker, writer and editor, with publications ranging from the Los Angeles Times Magazine to the magazine of the National Zoo to a food trends magazine.