in southern Egypt. Amratian culture (Naqada I) The Amratian culture lasted from about 4000 to 3500 BC. It is named after the site of El-Amra, about 120 km south of Badari. El-Amra is the first site where this culture group was found unmingled with the later Gerzean culture group, but this period is better attested at the Naqada site, so it also is referred to as the Naqada I culture. Black-topped ware continues to appear, but white cross-line ware, a type of pottery which has been decorated with close parallel white lines being crossed by another set of close parallel white lines, is also found at this time. The Amratian period falls between S.D. 30 and 39 in Petrie's Sequence Dating system. Newly excavated objects attest to increased trade between Upper and Lower Egypt at this time. A stone vase from the north was found at el-Amra, and copper, which is not mined in Egypt, was imported from the Sinai, or possibly Nubia. Obsidian and a small amount of gold were both definitely imported from Nubia. Trade with the oases also was likely. New innovations appeared in Amratian settlements as precursors to later cultural periods. For example, the mud-brick buildings for which the Gerzean period is known were first seen in Amratian times, but only in small numbers. Additionally, oval and theriomorphic cosmetic palettes appear in this period, but the workmanship is very rudimentary and the relief artwork for which they were later known is not yet present. Gerzean culture (Naqada II) The Gerzean culture, from about 3500 to 3200 BC, is named after the site of Gerzeh. It was the next stage in Egyptian cultural development, and it was during this time that the foundation of Dynastic Egypt was laid. Gerzean culture is largely an unbroken development out of Amratian Culture, starting in the delta and moving south through upper Egypt, but failing to dislodge Amratian culture in Nubia. Gerzean pottery is assigned values from S.D. 40 through 62, and is distinctly different from Amratian white cross-lined wares or black-topped ware. Gerzean pottery was painted mostly in dark red with pictures of animals, people, and ships, as well as geometric symbols that appear derived from animals. Also, "wavy" handles, rare before this period (though occasionally found as early as S.D. 35) became more common and more elaborate until they were almost completely ornamental. Gerzean culture coincided with a significant