BEFORE PRESENT
MODERN
88 B.P.--
HISTORICAL
500 B.P.--
MISSISSIPPIAN
1,200 B.P.--
HOHOKAM
1,800 B.P.--
WOODLAND
2,500 B.P.--
ARCHAIC
10,500 B.P.--
MIDDLE--LATE
PALEO-INDIAN
12,000 B.P.--
CLOVIS
14,000 B.P.--
PRE-SPANISH CONTACT
SOUTH OF US
12,000 B.P.--
AUSTRALIA
1,500 B.P.
NEOLITHIC
10,000 B.P.--
UPPER
PALEOLITHIC
40,000 B.P.--
MIDDLE
PALEOLITHIC
1.2 MILLION--
LOWER
PALEOLITHIC
2.6 MILLION--