| Chulec Formation | |
|---|---|
| Stratigraphic range: Albian | |
| Type | Geological formation |
| Underlies | Pariatambo Formation |
| Overlies | Inca Formation |
| Thickness | 100–200 m (330–660 ft) |
| Lithology | |
| Primary | Limestone |
| Other | Marl, shale, sandstone |
| Location | |
| Coordinates | 9°54′S 77°00′W / 9.9°S 77.0°W |
| Approximate paleocoordinates | 15°24′S 49°00′W / 15.4°S 49.0°W |
| Region | Cajamarca & Huánuco Regions |
| Country |  Peru |
| Type section | |
| Named for | Chulec, Yauli Province |
  Chulec Formation (Peru) | |
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 100 to 200 metres (330 to 660 ft) 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]