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Field guide to the Mesozoic arc and accretionary complex of South-Central Alaska, Indian to Hatcher Pass

September 30, 2015

This field trip traverses exposures of a multi-generation Mesozoic magmatic arc and subduction-accretion complex that had a complicated history of magmatic activity and experienced variations in composition and deformational style in response to changes in the tectonic environment. This Mesozoic arc formed at an unknown latitude to the south, was accreted to North America, and was subsequently transported along faults to its present location (Plafker and others, 1989; Hillhouse and Coe, 1994). Some of these faults are still active. Similar tectonic, igneous, and sedimentary processes to those that formed the Mesozoic arc complex persist today in southern Alaska, building on, and deforming the Mesozoic arc. The rocks we will see on this field trip provide insights on the three-dimensional composition of the modern arc, and the processes involved in the evolution of an arc and its companion accretionary complex.

Citation Information

Publication Year 2015
Title Field guide to the Mesozoic arc and accretionary complex of South-Central Alaska, Indian to Hatcher Pass
DOI
Authors Susan M. Karl, P.J. Oswald, Chad P. Hults
Publication Type Book
Publication Subtype Handbook
Series Title
Series Number
Index ID 70189142
Record Source USGS Publications Warehouse
USGS Organization Alaska Science Center Geology Minerals

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