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Geologic Map of the Anchorage C-8 NE Quadrangle, Alaska


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2014-05-22 11:36:00


Reger, R.D., Combellick, R.A., and Pinney, D.S., 1994, Geologic Map of the Anchorage C-8 NE Quadrangle, Alaska: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys,


This map is one of a series of four 1:25,000-scale quadrangle maps (Anchorage C-8 NE Quadrangle) intended to provide information on the geology and construction materials along the southern margin of the Talkeetna Mountains between Little Susitna River and Nancy Lake, Alaska. Additionally, the geologic map portrays faults, if present, as well as other lineaments that represent either faults or erosional features.


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This series of maps supplements an earlier series of similar maps for the adjacent area to the south between Palmer and Big Lake. A separate geologic-materials map was developed to show the probable distribution of materials with certain ranges of grain sizes, and their relative abundance, because the area is rich in geologic materials that may be useful for construction. It is an important source of construction aggregates for the region, because of extensive glaciofluvial deposits in the area. Additionally, the Castle Mountain fault, which is known to be active, traverses the area of the current series of maps. Although the fault is easily distinguishable in areas immediately to the east and west of the area mapped in this series, it is largely obscured here by surficial deposits and vegetation. We present on these maps the best known surface evidence for faults and possibly fault-related lineaments.

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