MAINE PUBLIC • July 15, 2025
In her new book, Strata, author Laura Poppick explores earth’s 4.54-billion-year history as revealed in its layers—its seafloors, riverbeds, and striated landscapes. Poppick, a Bates alum, introduces us to scientists puzzling out Earth’s deep history, from the oxygenation of the planet through the advent of life as we know it. They believe learning more about Earth’s past is key to understanding the future, and how Earth responds to change. We’ll also learn how Maine’s geologic history fits into the global picture. Panelists: Laura Poppick, author of Strata: Stories from Deep Time; Amber Whittaker, Maine Geological Survey; Douglas N. Reusch, professor of geology University of Maine Farmington. VIP Caller: Bob Gastaldo, emeritus professor of geology, Colby College; Maggie Kroenke, Maine Mineral & Gem Museum.