Northwestern North America (4,365 – 2,638 BCE)…

Northwestern North America (4,365 – 2,638 BCE) Late Holocene — Maritime Specialization, Estate Tenure, and Longhouse Emergence

Geographic and Environmental Context

Northwestern North America includes Alaska, western Canada (Alberta, British Columbia, Yukon and Northwest territory and Nunavut west of 110°W) Alaska, Washington State, northern Idaho, and the northwestern portions of Montana, Oregon, and California.

• Anchors: Outer Gulf of Alaska (Kodiak, Kenai), Haida Gwaii and Central Coast, Puget Sound inlets, Lower Columbia estuary.

Climate & Environmental Shifts

• Shorelines neared modern positions; stable estuaries and eelgrass meadows supported clams, herring, and salmon.

Subsistence & Settlement

• Shell-midden towns mark persistent occupation; weir estates and seal/sea-lion rookeries came under lineage control.

• Interior villages maintained pit-house traditions; cross-ecotone ties enhanced security.

Technology & Material Culture

• Plank-built canoes (mortise–tenon lashings, adze-finished strakes); robust net technologies; lamp–oil systems for winter light.

• Fine bone/antler harpoon heads, dentalium and shell beadwork as wealth items.

Movement & Interaction Corridors

• Inside Passage canoe highways; Fraser–Columbia trunk linked plateau lithics and furs to coastal oils and shell currency.

Cultural & Symbolic Expressions

• Lineage-ranking visible in burial goods and house platform size; ritual treatment of first salmon and sea mammals institutionalized.

Environmental Adaptation & Resilience

• Estate-based tenure and allied exchange networks buffered local failures; seasonal scheduling and storage maintained surpluses.

Transition

By 2,638 BCE, maritime societies with lineage estates and longhouse architecture were well established along many coasts.