| Bell Top Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Formation |
| Unit of | Spears Group |
| Underlies | Mogollon Group |
| Overlies | Palm Park Formation, Datil Group |
| Thickness | 800 feet (240 m) |
| Lithology | |
| Primary | Volcaniclastic |
| Location | |
| Coordinates | 32°29′47″N 107°07′05″W / 32.4963°N 107.1181°W |
| Region | New Mexico |
| Country | United States |
| Type section | |
| Named for | Bell Top Mountain |
| Named by | Kottlowski |
| Year defined | 1953 |
  Bell Top Formation (the United States)  Bell Top Formation (New Mexico) | |
The Bell Top Formation is a geologic formation in southern New Mexico.[1] Radiometric dating of surrounding tuffs indicate that it was deposited in the Oligocene epoch.[2]