Mount Toby Formation
| Mount Toby Formation | |
|---|---|
| Stratigraphic range: Jurassic | |
| Type | Formation | 
| Unit of | Newark Supergroup | 
| Location | |
| Region | Massachusetts | 
| Country | United States | 
The Mount Toby Formation is a geologic formation in Massachusetts. It preserves fossils dating back to the Jurassic period.{