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Studies of the ancient world help us to understand our modern environment. One important focus of such studies is the sedimentary rock record, which holds clues about how life and the environment have co-evolved over geologic time. Here at Dartmouth, Jim Aronson and Gary Johnson use various techniques in geochronometry (dating of rocks) and stratigraphic analysis to tease out the history of environmental change during the last 550 ma in currently or once tectonically-active areas like East Africa, the Himalayas, Taiwan, and Laramide basins of the American West. Brian Dade's research complements these field studies by developing applied physics-based models for the interpretation of ancient deposits emplaced by intense flows, such as avalanches, near-shore storms, and submarine turbidity currents. |
