The original nature of the ridge before being streamlined by the ice is unknown. It seems very wide for an esker although a tunnel-fill deposit is possible. The western ridge, as will be explained below, is much easier to explain. It is probably a former ice front, where glacial lake deposits topped by low moraines and alluvial fans were banked against the ice. The Eastern Ridge A view northwest toward the western ridge.
Duck Creek is marked by the tree line in the valley.
A view southeast toward dissected glacial deposits on the western edge of the city of Green Bay. In contrast to the eastern ridge, the origin of the western ridge is pretty clear-cut. Note the steep eastern front, the gentle western slope, and the very flat terrain west of the ridge. Also note that the flat terrain west of the ridge is much higher than the valley of Duck Creek. A view of the ridge looking southeast from County U just north of Oneida.