 The earliest settlers in Pennsylvania arrived from Asia between <unk> BCE and 8000 BCE , when the glaciers of the Pleistocene Ice Age were <unk> . <unk> point <unk> from this era , known as the <unk> @-@ Indian Period , have been found in most parts of the state . <unk> discoveries at the Memorial Park Site <unk> near the confluence of the West Branch Susquehanna River and Bald Eagle Creek collectively span about 8 @,@ 000 years and represent every major prehistoric period from the Middle Archaic to the Late Woodland period . Prehistoric cultural periods over that span included the Middle Archaic starting at <unk> BCE ; the Late Archaic starting at 3000 BCE ; the Early Woodland starting at 1000 BCE ; the Middle Woodland starting at 0 CE ; and the Late Woodland starting at 900 CE . First contact with Europeans occurred in Pennsylvania between 1500 and 1600 CE . 
