The Late Neolithic period showed development from the middle in building design, a wider range of more developed flint tools and a far larger variety of pottery with fabrication including silica. The Late Chalcolithic featured developments of "Canaanean blades" and fan scrapers. Adult burials in jars started to appear along with metal in the form of one copper hook, found in a jar. Some jars were lined with white plaster that was applied and self-hardened after firing. Copper appeared more frequently in the Late Chalcolithic period along with multiple burials in tombs and jar handles with impressed signs. Early Bronze Age remains were characterized by the development of Byblos combed ware and a lithic assemblage studied by Jacques Cauvin.