- Inventory Map -
SOILS
There are six main soil associations within the Study Area. While the exact type of soil at any particular place is not documented, the pattern of occurrence on the landscape is documented.
(A1) THE GILMAN-ANTHO-PIMER ASSOCIATION
These soils are deep, medium, moderately course and moderately fine textured soils, formed in recent alluvium from mixed sources, and level to gently sloping.
(B2) THE MOHOLL-PINAMT ASSOCIATION
These soils are deep, nearly level to gently sloping soils formed in old mixed alluvium. They are also found on slight ridges and upper fans with slopes of about one to five percent.
(D1) THE GUNSIGHT-CAVELT-RILLITO ASSOCIATION
This association consists of strongly calcareous, mixed old alluvium from a variety of rocks on slopes of two to 15 percent.
(E1) THE GRANITE AND SCHIST ROCK LAND (ARID & SEMI ARID) ASSOCIATION
Igneous rock outcrop makes up most of this soil association.
(E2) THE ANDESITE AND BASALT ROCK LAND (ARID/SEMI ARID) ASSOCIATION
These soils consist of arid and semiarid mountains and buttes composed mainly of andesite and basalt. In addition, there are various mixtures of tuffs and tuff agglomerate rocks, and small amounts of dacite, rhyolite, and sedimentary rocks. Slopes range from S to 60 percent or more.
(E3) THE ANDESITE AND BASALT ROCK LAND (SUBHUMID) ASSOCIATION
This association consists of the rough and mountainous areas of andesite. basalt, and tuff agglomerate. Approximately SO to 60 percent of this association is shallow or very shallow. Gravely, cobbley, or stoney, medium to fine textured solid between rock outcroppings, with small areas of moderately deep soils included. Slopes range from 5 to 45 percent.
SUITABILITY FOR DEVELOPMENT
The importance of soil associations relates to their physical effect on development. Some soils are well suited for development, and others may be extremely prohibitive.
The soil associations in the Study Area are generally split between suitable and unsuitable. All of the Rock Land associations (E1, E2, E3) have severe limitations for all development scenarios. The most suitable soil areas for development are (A1) & (B2). with (D1) soil areas being somewhat suitable, and the remaining soil areas least suitable for development.
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