Pecked curvilinear nucleated (PCN),[1] in archaeology, is a form of prehistoric rock carving. The term was originally proposed by Teresa Miller and Reed Haslam in 1976 to describe a widespread type of rock carving in western North America.[2] The form is characterized by a circular or oval groove element, which results in a raised center area.[3] The form is quite prevalent in California and is applied to a number of Native American rock carving sites in this portion of the United States.