| Chulec Formation | |
| Type: | Geological formation |
| Period: | Albian |
| Age: | Albian |
| Prilithology: | Limestone |
| Otherlithology: | Marl, shale, sandstone |
| Namedfor: | Chulec, Yauli Province |
| Region: | Cajamarca & Huánuco Regions |
| Coordinates: | -9.9°N -77°W |
| Paleocoordinates: | -15.4°N -49°W |
| Underlies: | Pariatambo Formation |
| Overlies: | Inca Formation |
| Thickness: | 100- |
The Chulec Formation (Ki-chu) is a geological formation in Peru whose strata date back to the Albian. The formation has a thickness of about 100mto200mm (300feetto700feetm) and comprises limestones, marls and calcareous sandstones that were deposited during a marine transgression from the west.[1] Pterosaur remains and ammonites are among the fossils that have been recovered from the formation.[2]