Decoding the Regional～1700 Ma Deformational History from the Rocks of Big Thompson Canyon Region of Colorado Using Monazite Dating of Foliations Preserved within Garnet and Staurolite Porphyroblastic Phases

Dating of monazite grains preserved within foliations defining FIAs(foliation inflection/intersection axes preserved within porphyroblasts)have provided a detailed chronology of deformational and metamorphic events during a regional～1700 Ma orogeny,in Big Thompson region of the Colorado Rockies in the USA.FIAs controlled dating of monazite grains preserved within multiple-foliations of garnet and staurolite porphyroblast have complemented and potentially revolutionized all traditional dating approaches available.With this technique it is possible to accurately differentiate the