| Mulichinco Formation | |
| Period: | Valanginian |
| Age: | Valanginian ~ |
| Type: | Geological formation |
| Prilithology: | Mudstone, siltstone, sandstone |
| Otherlithology: | Limestone |
| Unitof: | Mendoza Group |
| Underlies: | Agrio Formation |
| Overlies: | Vaca Muerta |
| Thickness: | 200- |
| Coordinates: | -38.5°N -70.2°W |
| Paleocoordinates: | -37.8°N -33.5°W |
| Region: | Neuquén Province |
| Country: | Argentina |
| Extent: | Neuquén Basin |
The Mulichinco Formation is a geological formation in Argentina. It is Valanginian in age and is predominantly terrestrial, being deposited at a time of marine regression in the Neuquén Basin, and predominantly consists of siliciclastic rocks.[1]
Dinosaur remains have been found in the formation, including those of the dicraeosaurid Pilmatueia[2] and carcharodontosaurid Lajasvenator.[3] Flora recovered from the formation includes the tree fern Tempskya dernbachii and horsetail Equisetites.[4]