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 and comprises limestones, marls and calcareous sandstones that were deposited during a marine transgression from the west. Pterosaur remains and ammonites are among the fossils that have been recovered from the formation. See also List of pterosaur-bearing stratigraphic units References Bibliography Geologic formations of Peru Lower Cretaceous Series of South America Cretaceous Peru Albian Stage Limestone formations Marl formations Shale formations Paleontology in Peru Geography of Cajamarca Region Geography of Huánuco Region