Spring 2026 Colloquium - Dr. Nick Zentner (Central Washington University)

Описание: In the ESS Spring 2026 Departmental Colloquium Series, this week's speaker was Dr. Nick Zentner (Central Washington University)

Talk Title: Westward Subduction and Alaska's Brooks Range

Abstract: Field mapping of Alaska's Brooks Range clearly demonstrates a collision of North America with an oceanic island arc that once dominated the northern Pacific Ocean. The geometry of the collisional suite in the Brooks Range strongly indicates westward subduction of an oceanic plate beneath the Koyukuk Arc. Why is westward subduction so difficult to imagine for younger collisions in Washington's tectonic history?