Elevation can be an important factor for understanding biotic distribution. Elevation can be used to contrast adjacent map units. For example, a sub-subdistrict of lake plain will generally be very flat and poorly drained. A sub-subdistrict of end moraine will have steeper, more irregular topography, characterized by better drainage conditions.
Area is listed in acres and hectares.
The states in which the section, subsection, or sub-subsection occurs are listed here. Several climatic variables are described, including average annual precipitation, average annual snowfall, average growing season length, and extreme minimum temperature. Other climatic factors may be discussed in certain sections, subsections, or sub-subsections. The influence of specific climatic factors on the biota and land management may also be discussed when appropriate. Predominant or common bedrock types are described, emphasizing the bedrock types closest to the surface.