Skip to Main Content
Skip Nav Destination

The Wet Mountains–southern Front Range region is underlain by high-grade granitic gneiss, amphibolite, and schist of Early Proterozoic age. These rocks were intruded by granitic to granodioritic plutons during four episodes: one in the Early Proterozoic (1,660 to 1,700 Ma) and three in the Middle Proterozoic (1,485 to 1,440 Ma, 1,370 to 1,360 Ma, and about 1,060 Ma). We also report here a zircon age determination (536 ± 4 Ma) for syenite of the Cambrian McClure Mountain alkaline-mafic complex.

The granitic gneiss was clearly formed before 1,700 Ma. Its protolith was probably pelitic to psammitic sedimentary rocks, in contrast to...

You do not currently have access to this chapter.

Figures & Tables

Contents

References

Related

Citing Books via

Related Articles
Close Modal

or Create an Account

Close Modal
Close Modal