The map is a surficial materials map. Deposits and residual
materials are distinguished in part on the basis of particle
size or texture, particle lithology or composition, and other
physical, chemical, and engineering characteristics. It is
not a map of soils that are recognized in agriculture,
agronomy, or pedology. Rather, it is a generalized map of
soils as recognized in engineering geology, or of substrata
or parent materials in which agricultural soils are formed.
Several classification systems for engineering and agricultural
soils are in use, and terminology differs. The textural or
particle size divisions (e.g., clay, sand, pebbles, boulders)
and the matrix nomenclature (e.g., loamy sand, clay loam,
silty clay) of the U.S. Department of Agriculture are used
here to ensure uniformity of terminology.
| Label |
Definition |
| Geounit |
Two digit letter symbol for the map unit description |
| Color |
The shade pattern number from the Arc/Info shadeset color524.shd. |
| R |
Percentage of red used to produce map unit colors. |
| G |
Percentage of green used to produce map unit colors. |
| B |
Percentage of blue used to produce map unit colors. |
