How Glaciers Affect Earth and Climate
Contemporary Science Issues and Innovations
May 16, 2017, Belmont Media Center, Belmont MA
Jack Ridge, Ph.D. Professor and Chair, Glacial and Quaternary Geology, Geomorphology, Tufts University
North American Glacial Varve Project (excellent information)
Professor Ridge is an expert on glacial cycles, with emphasis on how the last deglaciation in the northeastern U.S. influenced climate in North America. This investigation involves a reconstruction of the changes in the sediments left by ice sheets (varves) over centuries. The varve records provide crucial information about climate changes over long periods of time. The varve records also indicate when ancient habitation was possible or not.