BLM-managed badland of soft Pliocene lake and fluvial beds west of Safford that weather into a natural amphitheater of red and white knolls, sinkholes, short slot-like washes, and cave-like alcoves. The same geologic package that filled the Gila Valley with clay-rich 111 Ranch beds now stands as an informal geology playground visible from US-70 near Pima. Short exploratory walks reveal karst-like collapse features without a formal national-park trail system.
Field facts
| Region | Graham County, AZ |
|---|---|
| Coordinates | 32.9598, -109.9448 |
| County | Graham |
| Managing area | BLM (public land west of Safford / near Pima) |
| Geology | Pliocene 111 Ranch Beds; lacustrine/fluvial clays and limestones |
| Access style | Highway-adjacent public land; informal exploration |
| GNIS amphitheater | basin feature near Eden map |
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