Rare-earth-element compositions of Cenozoic volcanic rocks in the Southern Rocky Mountains and adjacent areas [report]

1987 unpublished
Variations among REE analyses of Cenozoic volcanic rocks and associated intrusions are interpreted in terms of tectonic setting, age of activity, and local igneous sequence U.S. GEOLOGICAL SURVEY BULLETIN 1668
doi:10.3133/b1668 fatcat:5j3l6e76rzfvjpegey2sjzolgq