Download or read book Precambrian Melasyenite of Ute Creek, San Juan Mountains, Colorado -- Chemistry, Petrology, and Strontium Isotopes written by Fred Barker and published by . This book was released on 1970 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hornblende-biotite melasyenite, exposed in an erosional window through Tertiary and Quaternary rocks, is similar in age and composition to rocks near Powerhorn, Colorado.