What geological event formed the Antler orogeny in Nevada?

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Devonian paleogeography — Devonian Period Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the early Devonian Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.

The Antler orogeny was a mountain-building event that occurred during the Late Devonian and Mississippian periods, approximately 340 to 370 million years ago. This geological event was driven by the accretion of volcanic island arcs to the western margin of the North American continent.123

These volcanic arcs, which formed primarily between 380 and 360 million years ago, were accreted to the continent from California to Alaska. This tectonic collision resulted in significant crustal deformation, including the development of the prominent eastward-moving Roberts Mountain Thrust fault. The event is well-documented in Nevada, where it caused clastic material to be shed eastward across the region.312