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| Studies by the U.S. Geological Survey in Alaska, 2004 |
Sketch tectonostratigraphic map of southeastern Alaska, showing locations of the Coast Mountains Complex, the Coast shear zone, the western metamorphic belt, the great tonalite sill, and the Chugach, Wrangellia, and Alexander terranes. |
| The western metamorphic belt is part of the Coast Mountains Complex of southeastern Alaska and western Canada. This complex formed as a result of mid-Cretaceous through middle Eocene crustal shortening between the previously amalgamated Wrangellia and Alexander terranes (Insular superterrane) and previously accreted terranes of the North American continental margin (Intermontane superterrane). The western metamorphic belt, which ranges from a few kilometers to several tens of kilometers in width, records a complex sequence of contact-metamorphic and regional metamorphic events. |
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Go to other chapters in this series: Haeussler, Peter J., and Galloway, John P., eds., 2005, Studies by the U.S. Geological Survey in Alaska, 2004: U.S. Geological Survey Professional Paper 1709.
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