Early Archaic • 8000 BC: The last
glacial period ends, causing
sea levels to rise and flood the
Beringia land bridge, closing the primary migration route from Siberia. • 8000 BC: Sufficient rain falls on the American Southwest to support many large mammal species
mammoth,
mastodon, and a
bison speciesthat soon go extinct. • 8000 BC: Hunters in the American Southwest use the
atlatl. • 7500 BC: Early
basketry. • 7560–7370 BC:
Kennewick Man dies along the shore of the
Columbia River in Washington State, leaving one of the most complete early Native American skeletons. • 7000 BC: Northeastern peoples depend increasingly on
deer,
nuts, and wild
grains as the climate warms. • 7000 BC: Native Americans in
Lahontan Basin, Nevada
mummify their dead to give them honor and respect, evidencing deep concern about their treatment and condition.
Middle Archaic • 6500 BC–200 AD: The
San Dieguito–Pinto tradition and
Chihuahua tradition flourish in the Southwest. • 6000 BC: Ancestors of
Penutian-speaking peoples settle in the Northwestern Plateau. • 6000 BC: Nomadic hunting bands roam Subarctic Alaska following herds of
caribou and other game animals. • 6000 BC:
Aleuts begin to arrive in the
Aleutian Islands. • 5700 BC: Cataclysmic eruption of
Mount Mazama in modern-day Oregon. • 5500 BC–500 AD:
Oshara tradition, a
Southwestern Archaic tradition, arises in north-central
New Mexico, the
San Juan Basin, the
Rio Grande Valley, southern
Colorado, and southeastern
Utah. • Natives of the Northwestern Plateau begin to rely on
salmon runs. • 5000 BC:
Early cultivation of food crops began in
Mesoamerica. • 5000 BC: Native Americans in the Pacific Northwest from Alaska to California develop a fishing economy, with
salmon as a staple. • 5000 BC: The
Old Copper culture of the Great Lakes area hammers the metal into various tools and ornaments, such as
knives,
axes,
awls,
bracelets,
rings, and
pendants. • 5000 BC–200 AD: The
Cochise tradition arises in the American Southwest. • 4500 BC: Emergence of the
Shield Archaic tradition. • Native Americans in the northern Great Lakes produce
copper tools, ornaments, and utensils traded throughout the Great Plains and Ohio Valley. • Shell ornaments and copper items at
Indian Knoll in
Kentucky evidence an extensive trade system over several millennia. • 4000 BC: Inhabitants of Mesoamerica cultivate
maize (corn) while Peruvian natives cultivate
beans and
squash. • 4000–1000 BC:
Old Copper complex emerges in the
Great Lakes region • 3500 BC: The largest, oldest drive site at
Head-Smashed-In Buffalo Jump, Alberta, Canada. • 3500–3000 BC: Construction of extensive mound complex built at
Watson Brake in the floodplain of the
Ouachita River near
Monroe in northern
Louisiana. • Shell ornaments and copper items at
Indian Knoll, Kentucky evidence an extensive trade system over several millennia.
Late Archaic • 3000 BC: Cultivation of the
sunflower and
marsh elder begins in the American South; northeastern natives cultivate
amaranth and marsh elder. After harvesting these plants, the people grind their seeds into flour. • 3000 BC: The
Cochise tradition of the American Southwest begin cultivating a primitive form of
maize imported from Mesoamerica;
common beans and
squash follow later. • 3000 BC: Native Americans of the Pacific Northwest begin to exploit
shellfish resources. • 3000 BC: Fishing in the Northwestern Plateau increases. • 3000 BC: Natives speaking the
Algonquian languages arrive in the
Northeastern Woodlands from the south. • Shell ornaments and copper items at
Indian Knoll, Kentucky evidence an extensive trade system over several millennia. • 2888 BC: People of the
Stallings culture on the
Savannah River begin making
pottery, at a time that
pottery making was spreading in South America, but had not reached Mesoamerica. • 2500–800 BC: The
Arctic Small Tool tradition develops on the
Alaska Peninsula, near
Bristol Bay, and on the eastern shores of the
Bering Strait in
Alaska. • 2500–1800 BC:
Aleutian tradition emerges in Alaska. • 2500 BC:
Independence I people enter
Greenland from North America. The last archaeological evidence of Independence I is from 1730 BC. • 2400 BC:
Saqqaq people enter Greenland from
Siberia and live there until 400 BC. • 2000–1000 BC:
Poverty Point culture in northeastern
Louisiana features stonework,
flintknapping,
earthenware, and
effigy, conical, and
platform mounds, as well as planned settlements on concentric earthen ridges • 1500 BC:
Salishan speakers arrive in Northwestern Plateau region. • 1500 BC–1000 AD:
Intermediate Horizon (or
Campbell tradition) emerged among
Indigenous peoples of California • 1000 BC:
Athapaskan-speaking natives arrive in the North American Arctic, possibly from
Siberia. • 1000 BC: Pottery making widespread in the
Eastern woodlands. ==Shield Archaic==