Wetlands occupy over 25 percent of the area. Wildfire occurrence is low. This section is heavily populated, and substantially affected by agriculture, urban development, petroleum extraction, and human recreation. Historically occupied by Tanaina Athabaskans, a variety of cultures now reside in this heavily developed section. Compiled by Alaska Region.
Most rivers originate from glaciers located in the surrounding mountains.
Lithology and Stratigraphy. Most soils are Aquepts, formed in pergelic temperature and aquic moisture regimes. Specifically, Histic Pergelic Cryaquepts, Aquic Cryochrepts, Typic Cryochrepts, Pergelic Cryaquolls, and Typic Cryoborolls predominate. Soils generally formed in clayey to silty glaciolacustrine sediments over gravelly glacial drift. Potential Natural Vegetation.