Major and trace-element analyses of Cenozoic volcanic rocks from southern Oregon, northern Nevada, and northeastern California

Major- and trace-element XRF analyses on two-hundred and ninety-nine Cenozoic volcanic rocks in southeastern Oregon northern Nevada, and northeastern California. These analyses are subdivided into 30-20 Ma rocks of ancestral Northern Cascade back-arc region, 16.7-15 Ma rocks of the Columbia Basin-Nevada magmatic belt, and 16.7-8 Ma rocks of the southern segment of the ancestral Cascades in the Oregon-Nevada-California tri-state region.