Last Glacial Period River, which in turn was formed during an earlier glacial period. In its retreat, the Wisconsin Episode glaciation left terminal moraines that form Long Island, Block Island, Cape Cod, Nomans Land, Martha's Vineyard, Nantucket, Sable Island, and the Oak Ridges Moraine in south central Ontario, Canada. In Wisconsin itself, it left the Kettle Moraine. The drumlins and eskers formed at its melting edge are landmarks of the Lower Connecticut River Valley. In the Sierra Nevada, there are three named stages of glacial maxima (sometimes incorrectly called ice ages) separated by warmer periods. These glacial maxima are called, from oldest to
Fluvio-glacial These hills can range in size and be up to 50 m tall and 400 m wide. A kame terrace is a relatively flat surface of sediment that was deposited between the valley surface and the glacier. When kames, kame surfaces, and other fluvio-glacial landforms are combined into one landscape, it is called a kame complex or glacial karst topography. Kettle holes are typically formed when a chunk of ice that came from the glacier is buried under fluvio-glacial sediments. Once the ice melts, the sediments fall and form a depression that can later be filled with rainwater and form