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I70 roadcut outcrop

View on map:39.703690°N 105.201538°W

Comments

There is convenient parking to hike to the roadcut and posts on the outcrop mark information about the dipping rocks exposed.  Rocks from the Morrison Formation along with the Dakota Group our exposed dipping eastward off of the Rocky Mountain uplift.  The Morrison Formation is famous for the dinosaur fossils it has produced in other areas of the country. 

Description


Morrison Formation

The Morrison Formation is a distinctive sequence of Upper Jurassic sedimentary rock that is found in the western United States, which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone and limestone and is light gray, greenish gray, or red. Most of the fossils occur in the green siltstone beds and lower sandstones, relics of the rivers and floodplains of the Jurassic period.

References

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