Moenkopi Formation
The Moenkopi Formation is a geological formation that is spread across the U.S. states of New Mexico, northern Arizona, Nevada, southeastern California, eastern Utah and western Colorado. This unit is considered to be a group in Arizona. Part of the Colorado Plateau and Basin and Range, this red sandstone was laid down in the Lower Triassic and possibly part of the Middle Triassic, around 240 million years ago.
| Moenkopi Formation | |
|---|---|
| Stratigraphic range: | |
Moenkopi at its reference section along the Little Colorado River west of Cameron, Arizona | |
| Type | Geological formation |
| Sub-units | See "Members" section |
| Underlies | Chinle Formation |
| Overlies | Kaibab Limestone |
| Lithology | |
| Primary | Sandstone |
| Other | Shale |
| Location | |
| Coordinates | 35.918°N 111.489°W |
| Region | Northern Arizona Southeast California East-central Nevada Southern Utah Northwestern New Mexico Southwestern Colorado |
| Country | Southwestern United States |
| Type section | |
| Named for | Moenkopi Wash |
| Named by | Ward |
| Year defined | 1901 |
Moenkopi Formation (the United States) Moenkopi Formation (Arizona) | |
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