Sangre de Cristo Formation
| Sangre de Cristo Formation Stratigraphic range: Carboniferous | |
|---|---|
| Type | Formation |
| Location | |
| Region | Colorado |
| Country | United States |
The Sangre de Cristo Formation is a geologic formation in Colorado. It preserves fossils dating back to the Carboniferous period.
Geological History
The oldest rocks are similar to those in other Colorado mountains—Precambrian gneiss from 1.8–1.7 billion years ago. Gneiss (layered metamorphic rock formed by heat and pressure—fig) makes up much of the range east of the Great Sand Dunes. Once the gneiss was sedimentary or igneous rock, but it rarely retains the original texture of these rocks as time passes.
See also
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.
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