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Table 1. A Timescale for Eastern Paleoindian Assemblages

[Long description]
Calendar BP Radiocarbon rcbp Occupations Northeastern Developments Midwestern Developments Southeastern Developments Climatic Event
8986, 8874, 8825, 8819 8,000 ARCHAIC OCCUPATIONS Bifurcate Horizon Bifurcate Horizon Bifurcate Horizon
10,189 9,000 Lanceolate types / Corner Notched Horizon Corner Notched Horizon Early Archaic Boreal
10,736, 10,708 10,702 9,500 Terminal Paleoindian / Early Archaic Early Archaic / Late Paleoindian Corner Notched Horizon
11,254, 11,253, 11,234 9,900 Early Side Notched Horizon Early Side Notched Horizon
11,545, 11,512, 11,400, 11391, 11,340 10,000 TERMINAL PALEOINDIAN OCCUPATIONS Holcombe type Dalton Horizon Holcombe type Early Side Notched Horizon Younger Dryas ends / Preboreal
11,687, 11,677, 11,642 10,100 Crowfield Type Crowfield type Late Paleoindian
11,930, 11,804, 11,768 10,200 Late Paleoindian Dalton Horizon Dalton Horizon
10, 500 Parkhill type Middle Paleoindian Quad / Beaver Lake Horizon
12,899 10,800 WIDESPREAD SETTLEMENT Folsom/Barnes types Cumberland / Folsom types
12,944 10,900 Clovis / Gainey Types Younger Dryas begins
12,999 11,000 Early Paleoindian Clovis / Gainey types Middle Paleoindian Inter-Allerid Cold Period ends
13,132 11,100
13,155 11,200 Clovis Widespread
13,411 11,400 Inter-Allerid Cold Period begins
13,455 11,500 INITIAL HUMAN OCCUPATIONS Clovis beginnings?? Allerid
13,811 11,750
14,043, 13,923, 13,858 11,950 Early Paleoindian Older Dryas ends
14,065 12,000 Chesrow Complex Little Salt Spring / Page-Ladson sites
14,100 12,100 Older Dryas begins
15,084, 14,731, 14,382 12,500 Early Paleoindian
15,231, 14,606, 14,449 12,600 Big Eddy site Billing begins
19,091 16,000 Meadowcroft site Cactus Hill site
21,392 18,000 Initial Colonization(?) Glacial maximum

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