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Koyukuk-Anvik

Basement domain in the Alaska

Geologic information

Region Alaska
Crust
Formation age: 175-125 Ma
Accretion
Type: Collisional
Age: 135-115 Ma
Notes Koyukuk arc

Geographic extent

Bethel, Nome, Wade Hampton, Yukon-Koyukuk

Bibliographic references

Box, S.E., and Patton, W.W., Jr., 1989, Igneous history of the Koyukuk terrane, western Alaska—Constraints on the origin, evolution and ultimate collision of an accreted island arc terrane: Journal of Geophysical Research, v. 94, p. 15,843–15,867.Moll-Stalcup, E.J., and Arth, J.G., 1989, The nature of the crust in the Yukon-Koyukuk province as inferred from the chemical and isotopic composition of five Late Cretaceous to Early Tertiary volcanic fields in western Alaska: Journal of Geophysical Research, v. 94, no. B11, p. 15,989–16,002.Patton, W.W., Jr., and Box, S.E. 1989, Tectonic setting of the Yukon-Koyukuk basin and its borderlands, western Alaska: Journal of Geophysical Research, v. 94, n. B11, p.15,807–15,820.Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, N., 2009, Geologic map of the Yukon-Koyukuk basin, Alaska: U.S. Geological Survey Scientific Investigations Map 2909, scale 1:250,000, 26 p.