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concentrate on major river valleys, but also follow transects across the state representing projects like <br /> utility lines and highways. <br /> Recorded sites include information about the type of site present and the time period or cultural <br /> affiliation. <br /> Site types include habitation(where people lived), mortuary(where burial activities took place), <br /> commercial(business location or resource exploitation), and dumps(refuse disposal). <br /> Time periods are usually divided into prehistoric and historic periods. The prehistoric period predates <br /> European exploration and settlement of this area. Designation of an archaeological site as "prehistoric" <br /> normally indicates that the archaeologist who recorded the site did not find any diagnostic artifacts that <br /> could date the site to a specific time period or cultural affiliation. <br /> The earliest time period in Illinois is the Paleoindian(10,000 B.C.). Sites from this era are rare and always <br /> considered significant when found. <br /> The next time period is identified as Archaic(8,000-600 B.C). The Archaic period is divided into Early <br /> Archaic (8,000-6,000 B.C),Middle Archaic(6,000-3,000 B.C.)and Late Archaic(3,000-600 B.C.) The <br /> Paleoindian and Archaic periods are dominated by hunting and gathering nomadic people. <br /> Towards the end of the Archaic period,habitation sites become larger and more permanently occupied, <br /> burial mounds start to be built, and plant domestication is present. <br /> . When pottery-making begins in 600 B.C. we enter the Woodland Period. The Woodland period is also <br /> divided into Early Woodland(600-200 B.C.), Middle Woodland(200 B.C.-A.D. 400)and Late Woodland <br /> (A.D. 400-900)periods. In northern Illinois Late Woodland continues into the historic period. <br /> The Woodland period is followed by the Mississippian period in central and southern Illinois and lasts <br /> from A.D. 900-1450. This is followed by the occurrence of proto-historic tribes during the next two <br /> hundred years. <br /> The historic period in Illinois begins in 1673 with the arrival of Marquette and Joliet. In Illinois, <br /> archaeologists and historians have divided historic sites into the following episodes: Historic(generic); <br /> Native American Historic(1673-present); Colonial (1673-1780); Pioneer(1781-1840); Frontier(1841- <br /> 1870); Early Industrial(1871-1900); Urban Industrial(1901-1945); and Post-War(1946-present). <br /> 15 <br />