| Sawatch Formation | |
|---|---|
| Stratigraphic range: Cambrian | |
| Type | Formation |
| Location | |
| Region | Colorado |
| Country | United States |
The Sawatch Formation is a geologic formation in eastern Colorado. It is a sedimentary sequence formed approximately 530 million years ago during a marine transgression. It preserves fossils dating back to the Cambrian period. It is composed of glauconitic and quartz-rich sandstone.
https://pubs.usgs.gov/of/1992/0718/report.pdf
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