This small sub-subsection consists of steep sand ridges deposited by the glaciers, as well as some high sand dunes near the present Lake Michigan shoreline. It is almost entirely forested. Growing season is approximately 140 days along the Lake Michigan shoreline and as short as 110 days at the eastern, upland edge of the sub-subsection. Average annual precipitation is 30 to 32 inches. Large, broad ridges of sandy ground moraines, some nearly 500 feet high.
Glacial drift is generally several hundred feet thick.
No major lakes or streams. Primarily well drained sands and sandy loams. The narrow, often steep valleys between the ridges are poorly or very poorly drained, but they account for only a small part of the sub-subsection's surface area. The predominant vegetation of the sub-subsection was northern hardwood forest dominated by beech, sugar maple, hemlock, basswood, hophornbeam, and yellow birch. Lowlands, restricted to relatively narrow valleys between the ridges, were dominated by northern white-cedar, or occasionally tamarack or mixed conifers.