FIELD TRIPS: Jelle Zeilinga de Boer, the Harold T. Stearns Professor of Earth Science, Emeritus, took students enrolled in his Graduate Liberal Studies Program SCIE 641 Earth Resources course to the Old New Gate prison and copper mine in East Granby, Conn. July 12. Here, he points out copper sulfate in the mine ground's walls. Students walk near a malachite mineral-rich rock, inside the former copper mine, which opened in the early 1700s and later became Connecticut's first prison in 1773. De Boer uses a particle detecting instrument to locate uranium in the copper mine. His summer class studied the…