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You are browsing the archive for 28 September 2011 - Mountain Beltway.

28 September 2011

Roadside wonders of Route 287

Northern Colorado’s route 287 connects Fort Collins, Colorado with Laramie, Wyoming. Along its length, it displays roadcuts into Archean-aged basement complex. Two of these outcrops are featured in this post: one metamorphic (mostly), and a second igneous (mostly), with some intriguing polka-dotted plutons.

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