The disappearance of this enormous reef system represents a series of events that constitute the greater geologic history of the Michigan Basin. The Michigan Basin is a bowl-shaped region in central ...

Even within a basin, there can be differences in how the sediment interacts with seismic waves. "There's variability in the shaking… there's variations in the geology," says Vidale. Sediment in ...

Harrison is currently the director of the Michigan Geological Repository for Research and Education, which he founded in 1982. He is interested in the Michigan basin and preservation of geological ...