 The basement geology of the Strawberry Mountain Wilderness is a Permian-age ophiolite complex consisting of a sequence of ultramafic, mafic, and silicic igneous rocks, interpreted to have formed as deep crustal rocks near an intra-oceanic island arc system.The sequence is distinctive from other Permo-Triassic ophiolite-type complexes in Western North America by its large volume of silicic intrusive and volcanic rocks.By the mid-Triassic, this complex had been heavily fragmented, uplifted, and overlain by Triassic-age oceanic sediments.