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.15 km east of Huanzala Mine at Fossilworks.org Pterosaur remains and ammonites are among the fossils that have been recovered from the formation.Barrett et al., 2008, pp.61-107
See also List of pterosaur-bearing stratigraphic units
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