Gneiss
Gneiss outcrops along the Beartooth Highway near the Highway Maintenance Station close to Clay Butte in nortwestern Wyoming. The gneiss exposed here belongs to a igneous-metamorphic rock complex of Archean age which has been dated radiometrically at around than 2.6 billion years old. These rocks represent a time when Wyoming was a separate microcontinent called the Wyoming Craton which existed 500 million years before the North American Continent formed.
Gneiss
Gneiss outcrops along the Beartooth Highway near the Highway Maintenance Station close to Clay Butte in nortwestern Wyoming. The gneiss exposed here belongs to a igneous-metamorphic rock complex of Archean age which has been dated radiometrically at around than 2.6 billion years old. These rocks represent a time when Wyoming was a separate microcontinent called the Wyoming Craton which existed 500 million years before the North American Continent formed.