Surficial geology of the Tyonek area, south-central Tyonek Quadrangle, Alaska
Dates
Publication Date
2015
Start Date
2007
End Date
2015
File Modification Date
2016-05-12 12:13:00
Citation
Reger, R.D., Stevens, D.S.P., and Koehler, R.D., 2015, Surficial geology of the Tyonek area, south-central Tyonek Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys, http://dx.doi.org/10.14509/29471.
Summary
The Tyonek area in the northwestern Cook Inlet trough is rich in petroleum, coal, geothermal, aggregate, and timber resources, but the detailed geologic mapping necessary for planning future resource development exists only in part of the area. This report and geologic map provide basic surficial-geologic information useful for exploiting those resources and planning future utility corridor developments. In addition to mapping of surficial geologic units, we provide discussion of strategraphic evidence pertaining to physiographic relations and geologic history of volcaniclastic deposits derived from ancestral Mount Spurr, multiple phases of Quaternary glacial activity, Chakachatna River valley landslide complexes and debris avalanches, [...]
Summary
The Tyonek area in the northwestern Cook Inlet trough is rich in petroleum, coal, geothermal, aggregate, and timber resources, but the detailed geologic mapping necessary for planning future resource development exists only in part of the area. This report and geologic map provide basic surficial-geologic information useful for exploiting those resources and planning future utility corridor developments. In addition to mapping of surficial geologic units, we provide discussion of strategraphic evidence pertaining to physiographic relations and geologic history of volcaniclastic deposits derived from ancestral Mount Spurr, multiple phases of Quaternary glacial activity, Chakachatna River valley landslide complexes and debris avalanches, the Kaloa deposits in northwestern Cook Inlet, Lake Clark fault, and holocene flooding in the Beluga, Chichantna, Chakachatna, and McArthur river drainages.
The 2,220 square km Tyonek map area near the northwestern shore of upper Cook Inlet contains important petroleum, coal, aggregate, geothermal, and timber resources. This report provides basic surficial-geologic information useful for exploiting those resources and planning future utility corridor developments.