Proterozoic History of the Southern Half of the Mount Evans 7.5- Minute Quadrangle: Evidence for a CA. 1.4 Ga Orogenic Event in the Central Front Range, Colorado, The
The Proterozoic history of the southeastern margin of Laurentia, especially during the Mesoproterozoic, is not well defined. Several tectonic events occurred during this time. The first two events were the Paleoproterozoic Yavapai (~1.71-1.68 Ga) and Mazatzal (~1.65-1.60 Ga) orogenies. The third is the more recently recognized Mesoproterozoic Picuris orogeny (~1.4 Ga). Evidence for the Picuris orogeny has been found in northern New Mexico, Arizona, and Colorado; however, the extent of the orogen is unclear. In Colorado, previously recognized effects of the Picuris orogeny are primarily ...
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