| Mae Long Formation | |
|---|---|
| Stratigraphic range: Early Miocene (MN 4) ~ | |
| Type | Geological formation |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Region | Lamphun Province |
| Country | Thailand |
| Extent | Li Basin |
The Mae Long Formation in the Li Basin (also referred to as Li Mae Long) is a fossil site in Lamphun Province, Thailand. The fossils found are thought to date to the late Early Miocene, about 18 million years ago, corresponding to the European zone MN 4.
Mammals found at the site include: