West Africa (49,293 – 28,578 BCE) Upper Pleistocene I — Foragers of River Valleys and Green Sahara Corridors

Geographic and Environmental Context

The Atlantic and inland belt from Senegal and Mauritania east through Mali, Niger, Burkina Faso, and Nigeria (western and central), plus the forest–savanna margins of Guinea, Sierra Leone, Liberia, Côte d’Ivoire, Ghana, Togo, and Benin.

Anchors: Senegal–Gambia valleys, Inland Niger Bend and Inland Delta (Timbuktu, Mopti, Gao), Middle Niger–Kainji basin, Jos Plateau, Hausaland (Kano, Katsina, Zaria), Upper Volta basin, Gold Coast forest margins, Futa Jallon highlands, Dahomey Gap.

• LGM: Sahara hyper-arid; Lake Chad contracted.

• Sahel savanna narrowed to thin strip.

• Niger–Senegal–Volta valleys shrank but retained perennial water.

Climate & Environmental Shifts

• Cooler, drier; dust storms frequent.

• Seasonal streams ephemeral; only major rivers provided continuity.

Subsistence & Settlement

• Foragers along Senegal–Gambia and Niger hunted antelope, aurochs, and hippo.

• Fishing supplemented lean seasons.

• Futa Jallon uplands provided refugia with springs.

Technology & Material Culture

• Core–flake tools, quartz microliths.

• Shell and bone ornaments.

Movement & Interaction Corridors

• Senegal–Niger corridor carried movement between coastal and inland refugia.

• Green Sahara corridors limited but provided episodic exchange.

Cultural & Symbolic Expressions

• Ochre use and body ornamentation.

• Rock shelters in Mali/Senegal show symbolic traces.

Environmental Adaptation & Resilience

• Mobility between rivers and upland refugia buffered aridity.

Transition

By 28,578 BCE, West African foragers had stabilized around perennial river corridors.

Northeastern Eurasia (28,577 – 7,822 BCE): Late Pleistocene–Early Holocene — Beringian Migrations, Salmon Economies, and the First Pottery Traditions

Geographic & Environmental Context

At the end of the Ice Age, Northeastern Eurasia—stretching from the Urals to the Pacific Rim—was a vast, deglaciating world of river corridors, boreal forests, and emerging coasts. It included three key cultural–ecological spheres:

• Northwest Asia — the Ob–Irtysh–Yenisei heartlands, Altai piedmont lakes, and Minusinsk Basin, bounded by the Ural Mountains to the west. Here, deglaciation produced pluvial lake systems, and forest belts climbed into the Altai foothills.

• East Europe — from the Dnieper–Don steppe–forest margins to the Upper Volga–Oka and Pripet wetlands, a corridor of interlinked rivers and pluvial basins supporting rich postglacial foraging.

• Northeast Asia — the Amur and Ussuri basins, the Sea of Okhotsk littoral, Sakhalin and the Kuril–Hokkaidō arc, Kamchatka, and the Chukchi Peninsula—a maritime–riverine realm where early Holocene foragers developed salmon economies and pottery traditions under the warming Pacific westerlies.

Together these subregions formed a continuous arc of adaptation spanning tundra, taiga, and coast—an evolutionary laboratory for the technologies and traditions that would later circle the entire North Pacific.

Climate & Environmental Shifts

• Bølling–Allerød (14,700–12,900 BCE): Rapid warming and higher precipitation expanded boreal forests and intensified riverine productivity across Eurasia’s north. Salmon runs strengthened in the Amur and Okhotsk drainages; pluvial lakes filled the Altai basins.

• Younger Dryas (12,900–11,700 BCE): A temporary cold–dry reversal restored steppe and tundra, constraining forests to valleys; lake levels fell; inland mobility increased.

• Early Holocene (after 11,700 BCE): Stable warmth and sustained moisture drove forest advance (pine, larch, birch) and high lake stands; sea levels rose along the Okhotsk and Bering coasts, flooding older plains and establishing modern shorelines.

These oscillations forged adaptable forager systems able to pivot between large-game mobility and aquatic specialization.

Subsistence & Settlement

Across the northern tier, lifeways diversified and semi-sedentism began to take root:

• Northwest Asia:
  Elk, reindeer, beaver, and fish formed broad-spectrum diets. Lakeside camps in the Altai and Minusinsk basins became seasonal home bases, while Ob–Yenisei channels hosted canoe or raft mobility. Forest nuts and berries expanded plant food options in warm phases.

• East Europe:
  Along the Dnieper, Don, and Upper Volga, foragers targeted elk, red deer, horse, and beaver, exploiting riverine fish and waterfowl. Repeated occupations at lake outlets and confluences reflect increasing site permanence and food storage.

• Northeast Asia:
  The Amur–Okhotsk region pioneered salmon-based economies, anchoring early Holocene villages at river confluences and estuarine terraces. Coasts provided seal, shellfish, seabirds, and seaweeds, while inland foragers pursued elk and musk deer. Winter sea-ice hunting alternated with summer canoe travel along the Sakhalin–Kuril–Hokkaidō chain.

This mosaic of economies—lake fishers, river hunters, and sealers—reflected the continent’s growing ecological diversity.

Technology & Material Culture

Innovation was continuous and regionally distinctive:

• Microblade technology persisted across all subregions, with refined hafting systems for composite projectiles.

• Bone and antler harpoons, toggling points, and gorges evolved for intensive fishing and sealing.

• Ground-stone adzes and chisels appeared, enabling woodworking and boat construction.

• Early pottery, first along the Lower Amur and Ussuri basins (c. 15,000–13,000 BCE), spread across the Russian Far East—among the world’s earliest ceramic traditions—used for boiling fish, storing oils, and processing nuts.

• Slate knives and grindstones at Okhotsk and Amur sites show specialized craft economies.

• Personal ornaments in amber, shell, and ivory continued, while sewing kits with eyed needles and sinew thread supported tailored, waterproof clothing.

These toolkits established the technological template for later northern and Pacific Rim foragers.

Movement & Interaction Corridors

• Ob–Irtysh–Yenisei river systems funneled movement north–south, linking the steppe with the taiga and tundra.

• Altai and Ural passes maintained east–west contact with Central Asia and Europe.

• Dnieper–Volga–Oka networks merged the European forest-steppe into the greater Eurasian exchange field.

• In the Far East, the Amur–Sungari–Zeya–Okhotsk corridor unified interior and coast, while the Sakhalin–Kuril–Hokkaidō arc allowed short-hop voyaging.

• Across the Bering Strait, fluctuating sea levels intermittently connected Chukotka and Alaska, maintaining Beringian gene flow and cultural exchange.
  These conduits supported both biological and technological diffusion at a continental scale.

Cultural & Symbolic Expressions

• Ochre burials with ornamented clothing and ivory or antler goods reflect deep symbolic continuity from the Upper Paleolithic.

• Petroglyphs and engravings in the Altai and Minusinsk basins, and later in Kamchatka, depict large animals, waterbirds, and solar motifs.

• Amur basin figurines and carved marine-mammal and fish effigies attest to ritualized relationships with food species.

• In the Far East, early evidence of first-salmon and bear-rite traditions foreshadows later Ainu and Okhotsk ceremonialism.

Across all subregions, water and game remained the core of spirituality, connecting people to cyclical abundance and ancestral landscapes.

Environmental Adaptation & Resilience

Foragers across Northeastern Eurasia met environmental volatility with creative versatility:

• Zonal mobility (taiga–tundra–coast) and multi-season storage (dried meat, smoked fish, rendered oils) stabilized food supply.

• Boat and ice technologies extended reach across seasons.

• Broad-spectrum diets cushioned against climatic downturns.

• Flexible dwellings and social alliances allowed fission and fusion as resources shifted.

• Memory landscapes—engraved rocks, ritual mounds, named rivers—preserved continuity through spatial change.

Genetic and Linguistic Legacy

The Beringian population standstill during the Late Glacial created a deep ancestral pool for both Paleo-Inuit and First American lineages, while reciprocal migration reconnected Chukchi, Kamchatkan, and Amur populations after sea-level rise.
These long-lived networks seeded circum-Pacific cultural parallels in salmon ritual, dog-traction, maritime hunting, and composite toolkits, forming the northern backbone of later trans-Pacific cultural continuity.

Long-Term Significance

By 7,822 BCE, Northeastern Eurasia had become one of the world’s great centers of forager innovation:

• Northwest Asia’s pluvial lakes fostered early semi-sedentism and the first rock art of Siberia.

• East Europe’s river–lake foragers stabilized broad-spectrum economies bridging steppe and forest.

• Northeast Asia’s salmon-rich coasts and early pottery traditions created the technological and ritual matrix that would radiate across the North Pacific.

This continental synthesis of aquatic resource mastery, ceramic innovation, and long-range mobility defined the emerging Holocene north—a zone where people and landscape adapted together through water, ice, and memory.

Northeast Asia (28,577 – 7,822 BCE): Upper Paleolithic II — Beringian Standstill, Early Pottery Horizons, and Salmon Towns

Geographic and Environmental Context

Northeast Asia includes eastern Siberia east of the Lena River to the Pacific, the Russian Far East (excluding the southern Primorsky/Vladivostok corner), northern Hokkaidō (above its southwestern peninsula), and extreme northeastern Heilongjiang.

• Anchors: the Lower/Middle Amur and Ussuri basins, the Sea of Okhotsk littoral (Sakhalin, Kurils), Kamchatka, the Chukchi Peninsula (with Wrangel Island offshore), northern Hokkaidō, and seasonally emergent shelves along the Bering Sea and northwest Pacific.

Climatic Crisis and Population Transformation During the LGM

Between roughly 28,500 and 20,000 years ago, the onset of the Last Glacial Maximum (LGM) profoundly altered Northeast Asia. Ice sheets, permafrost expansion, and ecological fragmentation reduced habitable zones across Siberia.

During and immediately after this period, the Ancient North Siberians were largely replaced by populations carrying ancestry closely related to East Asians. This was not a simple migration but a prolonged process of demographic turnover, admixture, and regional extinction.

Out of this transformation emerged two closely related populations:

• Ancestral Native Americans

• Ancient Paleosiberians (AP)

Paleoclimatic modeling strongly supports southeastern Beringia as a long-term refugium during the LGM, providing a stable ecological zone where these populations could persist, interact, and differentiate.

Climate and Environmental Shifts

• Bølling–Allerød (c. 14,700–12,900 BCE): warming and moisture increase expanded boreal forest into valleys; salmon runs intensified; nearshore productivity rose.

• Younger Dryas (c. 12,900–11,700 BCE): brief return to cooler, drier conditions; tundra patches expanded but ice-free coasts still offered reliable marine resources.

• Early Holocene (after c. 11,700 BCE): stabilizing warmth and rising sea level reshaped shorelines; taiga expanded fully; rich riverine and estuarine habitats matured.

Subsistence and Settlement

• Deglaciating coasts supported seal and salmon economies; intertidal shellfish beds and seabird rookeries fueled seasonal aggregation.

• In warming phases, diets diversified toward fish (salmon, sturgeon), small game, and plant foods (nuts, roots, berries).

• Younger Dryas prompted higher mobility and renewed emphasis on large herbivores where herds persisted.

• Early Holocene villages favored river confluences and coastal terraces, ideal for salmon weirs and broad foraging radii.

Technology and Material Culture

• Microblade production refined; hafted composite points standardized for hunting and sealing.

• Bone/antler harpoons with toggling tips; barbed fishhooks; sewing kits for tailored garments and waterproof seams.

• Early pottery appears in the Lower Amur–Russian Far East and spreads to surrounding basins—among the world’s earliest ceramic traditions—used for fish oils, stews, and nut processing.

• Ground-stone adzes for wood-working and dugout canoe manufacture; slate knives on some Okhotsk coasts.

Movement and Interaction Corridors

• Amur–Sungari waterway integrated interior and coast; Sakhalin–Kuril–Hokkaidō island chain enabled short-hop voyaging.

• Beringian standstill: populations on both sides of the strait developed long-term ties; fluctuating sea levels modulated contact.

• Seasonal sea-ice bridges facilitated winter travel; summer lanes favored canoe movement.

Cultural and Symbolic Expressions

• Carved bone and ivory figurines, zoomorphic engravings, and ochre burials persisted, signaling continuity with earlier Upper Paleolithic symbolic systems.

• Recurrent salmon first-catch rites and bear/sea-mammal treatment practices are inferred from patterned discard and ritualized processing locales.

Environmental Adaptation and Resilience

• Zonal mobility (taiga–tundra–coast) and storage (dried fish, rendered oils) buffered climate swings across Bølling–Allerød → Younger Dryas → Early Holocene.

• Canoe technologies, fish weirs, and shoreline mapping (capes, tide rips, haul-outs) underwrote stable subsistence as forests spread and shorelines shifted.

Genetic and Linguistic Legacy

• Prolonged Beringian population structure during late glacial–early Holocene times contributed ancestry to Paleo-Inuit and to the First Americans; reciprocal gene flow linked Chukchi–Kamchatka–Amur families.

• These deep ties foreshadowed later circum-North Pacific cultural continuities in salmon ritual, dog-traction, and composite toolkits.

Transition Toward the Holocene Forager Horizons

By 7,822 BCE, Northeast Asia featured mature taiga coasts, prolific salmon rivers, and early pottery villages—a landscape primed for the broad-spectrum, semi-sedentary foraging economies that would dominate the Early Holocene and eventually feed into Epi-Jōmon/Satsumon, Okhotsk, and Amur basin cultural florescences.

Northern North America (28,577 – 7,822 BCE): Upper Pleistocene II → Early Holocene — Deglaciation, Kelp Highways, and Pluvial Heartlands

Geographic & Environmental Context

From the Bering Strait and Aleutians to the Gulf of Alaska, down the Inside Passage–Haida Gwaii–Vancouver Island chain and along the Klamath–Redwood coast, and across the continent through the Yukon–Fraser–Columbia–Mississippi drainages to the Great Lakes–St. Lawrence, Hudson Bay, and the Mid-Atlantic–New England shore, Northern North America took shape as ice withdrew and seas rose.
Three interlocking spheres structured lifeways:

• Northwestern North America — The Cordilleran–Beringian gateway, with Brooks Range and North Slopetundras, Yukon–Kuskokwim and Copper–Cook Inlet basins, the Gulf of Alaska and Aleutian arcs, and the Southeast Alaska–Haida Gwaii–outer BC fjordlands. Late-opening ice-free corridors and a sheltering, resource-rich kelp-forest coast defined movement and subsistence.

• Gulf & Western North America — The California Current coast (Channel Islands to Puget/Salish), the Lower Mississippi and Gulf Coast estuaries, the Southern Plains, Colorado Plateau, and the Great Basin of pluvial lakes. Here, estuary chains, canyon springs, and inland basins created a patchwork of productive niches.

• Northeastern North America — The Chesapeake–Delaware–Hudson–Gulf of Maine margins, Great Lakes–Ohio–Mississippi valleys, Appalachian ridge-and-valley, Upper St. Lawrence–Quebec, and the Baffin–Labrador rim. As the Ancylus/Champlain seas waxed and waned and isostatic rebound re-shaped coastlines, mixed forest–water ecotones proliferated.

Across all three spheres, postglacial estuaries, high-latitude tundra–taiga mosaics, and greening loess plainscreated an integrated coast–river–lake system that drew people into longer stays at dependable water-edge nodes.

Climate & Environmental Shifts

• Bølling–Allerød (c. 14.7–12.9 ka): Warmer, wetter conditions greened interior loess plains, invigorated riverine and lacustrine productivity, and stabilized nearshore kelp forests; small ice-free coastal pockets opened along the Gulf of Alaska and SE Alaska–BC fjords.

• Younger Dryas (c. 12.9–11.7 ka): A sharp cold–dry pulse renewed steppe/tundra, pinched interior water sources, and funneled people to fjord mouths, estuaries, and spring-fed refugia where marine and riparian resources remained reliable.

• Early Holocene (post-11.7 ka): Rapid warming and rising seas flooded outer shelves, forming the modern estuaries and sounds; oak–hazel–elm forests raced poleward; salmon-bearing rivers stabilized; Great Basinlakes still dotted the interior though retreating.

This cadence favored dual mobility—coast ↔ interior, lake ↔ plain—while encouraging semisedentary anchoring at rich aquatic nodes.

Subsistence & Settlement

A continent-spanning broad-spectrum foraging economy matured, increasingly underwritten by fisheries and wetland yields:

• Northwestern Coast & Beringia: Foragers moved fjord by fjord along a “kelp highway,” harvesting rockfish, salmon, shellfish, sea urchins, waterfowl, and seals, with dugout/skin boats, tailored parkas, and sinew-sealed seams enabling year-round littoral rounds. Interior camps on river benches and rock shelters targeted caribou, elk, and whitefish/salmon at crossings; by the Early Holocene, weirs and fish traps appear, and stays on raised marine terraces lengthened toward semisedentism.

• Gulf & Western Interior: Along the Lower Mississippi and Gulf estuaries, semirecurrent camps clustered on natural levees, working oyster bars, mullet/menhaden runs, and back-swamp fauna. On the California–Channel Islands and outer coast, dense shell-middens, canoe/raft use, and targeted seabird/sea-mammalharvests foreshadow later maritime societies. In the Great Basin and Southwest, shore camps on pluvial lakescaptured fish and waterfowl, while pronghorn and small-game drives, geophyte digging, and seed processing rounded out diets.

• Northeast & Great Lakes: Estuary and bay-head hamlets on the Severn–Delaware–Hudson–Maine coasts built early shell heaps; interior Great Lakes–river communities fished salmonids and sturgeon, hunted deer and moose, and gathered hazelnut, oak mast, and berries. Camps were seasonal but repeatedly reoccupied on dune ridges and terrace knolls, laying down deep middens and cemeteries.

Across all zones, semisedentary seasonality—anchoring at rich nodes with radiating forays—became a hallmark of the period.

Technology & Material Culture

Light, adaptable, and increasingly specialized toolkits supported both mobility and storage:

• Lithics: Persistent microblade industries in the NW; widespread backed bladelets, trapezes, and notched/side-notched points elsewhere.

• Aquatic gear: Bone/antler harpoons (often toggling), gorges, barbed points; stake-weirs, woven fish baskets, and net floats/sinkers; dugouts and skin boats on protected waters.

• Processing & containers: Grinding slabs and handstones for seeds/geophytes; drying racks and smokehouses for fish/meat; organic containers (bark, skin); early use of blubber oils for waterproofing gear.

• Ornaments & pigments: Beads of shell, bone, jet/amber, and teeth; ochre widely used in body/ritual contexts; carved bone/antler animal motifs signal deepening predator–prey cosmologies.

Movement & Interaction Corridors

A web of redundant routes ensured resilience:

• Coastal: stepwise Southeast Alaska–Haida Gwaii–Vancouver Island–Puget; Klamath–Channel Islands arcs; short-hop cabotage between estuaries.

• Riverine: Yukon, Fraser, Columbia, Sacramento–San Joaquin, Mississippi–Ohio–Illinois, St. Lawrence—all served as driftways, trade channels, and seasonal migration guides.

• Overland: Drakensberg-style highland corridors in the Rockies and Appalachians; portages binding watersheds; interior Great Plains and boreal routes linking basins.

These corridors moved not only people and tools but also dried fish, fat, hides, pigments, and ideas, knitting together far-flung bands.

Cultural & Symbolic Expressions

Symbolic life was entwined with water, animals, and place:

• Rock art and pecked engravings mark canyon walls and coastal shelters; imagery of salmon, seals, caribou, bear, and watercraft points to a cosmology of reciprocity with “animal persons.”

• Red-ochre burials with curated toolkits and ornaments cluster near estuaries, lake margins, and river terraces, fixing lineage rights to critical nodes.

• Midden mounds and lacustrine deposits served as ceremonial foci and archives of feast and return, materializing ancestral claims over weirs, groves, and crossings.

Environmental Adaptation & Resilience

Forager strategies balanced anchoring with agility:

• Coastal–interior duality ensured protein continuity through climatic pulses;

• Storage of oils, dried fish/meat, and nuts underwrote winter and drought survival;

• Fine-grained seasonal scheduling tracked flood pulses, salmon runs, waterfowl migrations, and mast years;

• Territorial norms around weirs, springs, and beaches managed access and minimized conflict.

These practices allowed populations to ride out the Younger Dryas setback and capitalize on Early Holocene productivity.

Long-Term Significance

By 7,822 BCE, Northern North America had coalesced into a storage-rich, water-anchored forager world: salmon estuaries and kelp-forest coasts in the northwest, pluvial-lake and estuary chains across the west and Gulf, and forest–river–bay mosaics in the northeast.
This emergent system—portfolio subsistence, semi-sedentary nodes with radiating rounds, engineered fisheries and food storage, and ritualized tenure over key waters—formed the durable substrate from which later Northwest Coast maritime societies, Archaic mound-building traditions, and riverine trade networks would grow as the Holocene unfolded.

The earliest evidence for human presence in North America emerges during this period, though the timing and routes of initial migration remain subjects of intense scientific debate. Human footprints preserved in ancient lake sediments at White Sands, New Mexico, provide the strongest evidence for human activity around 21,000-23,000 years ago, placing people in North America during the height of the Last Glacial Maximum.

These early inhabitants likely arrived via two possible routes: coastal migration along the Pacific Northwest using watercraft to navigate ice-free shorelines, or overland passage through Beringia—the vast land bridge connecting Siberia to Alaska when sea levels dropped due to massive continental ice sheets. Archaeological evidence of coastal occupation from this period would now lie submerged beneath 100 meters of post-glacial sea level rise.

During the Last Glacial Maximum (26,500-19,000 years ago), much of northern North America remained locked under ice sheets, but Beringia provided a viable refuge where humans could have lived alongside now-extinct megafauna including woolly mammoths, horses, and giant ground sloths. Some controversial sites suggest even earlier human presence—potentially 26,000-30,000 years ago—though these claims await broader scientific acceptance.

As the climate gradually warmed after 19,000 years ago, retreating ice sheets began opening new migration corridors and habitable territories. Small, highly mobile bands of hunter-gatherers adapted to diverse environments from tundra grasslands to emerging forests, setting the stage for the more widespread continental occupation that would follow.

Northwestern North America (28,577 – 7,822 BCE) Upper Paleolithic II — Deglaciation Gateways, Coastal Pathways, and Inland Refugia

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: the Bering Strait & Seward Peninsula, Brooks Range & North Slope, Yukon–Kuskokwim and Copper–Cook Inlet basins, the Gulf of Alaska & Aleutians, the Inside Passage/Haida Gwaii and outer coast of British Columbia, the Stikine–Skeena–Fraser–Columbia plateaus and canyons, Puget Sound, and the Klamath–Redwood coast of NW California.

• Deglaciation opened seasonal lanes between the Cordilleran and Laurentide ice sheets late; the Pacific fjord coast developed rich estuaries; interior loess plains greened.

Climate & Environmental Shifts

• Bølling–Allerød warming (c. 14,700–12,900 BCE) improved forage and river productivity; Younger Dryas (c. 12,900–11,700 BCE) briefly re-invigorated cold, aridity; Early Holocene warmth followed.

Subsistence & Settlement

• Coastal “kelp highway” foragers harvested kelp-forest fish, shellfish, sea mammals, and seabirds along the Gulf of Alaska–BC archipelagos.

• Inland, caribou and elk dominated mesas and river crossings; fish (salmon, whitefish) took on growing importance with weirs and traps by the Early Holocene.

• Camps proliferated on raised marine terraces, river benches, and rock shelters.

Technology & Material Culture

• Persistent microblade technology; bone harpoons, barbed points; early dugout precursors for nearshore travel.

• Tailored parkas and waterproof seams (sinew thread, blubber oil dressings) support maritime rounds.

Movement & Interaction Corridors

• Fjord-by-fjord voyaging stitched Southeast Alaska–Haida Gwaii–Vancouver Island; inland river driftways (Yukon, Upper Fraser) linked plateaus.

Cultural & Symbolic Expressions

• Red-ochre burials and curated toolkits suggest emergent territorial memory; carved bone/antler animal imagery reflects predator–prey relations.

Environmental Adaptation & Resilience

• Dual-mobility strategy (coast and interior) ensured redundancy across climatic pulses; seasonal storage of dried fish/oils began to anchor semi-sedentism.

Transition

By 7,822 BCE, salmon estuaries and deglaciated coasts enabled increasingly fish-centered economies while inland big-game pursuits persisted.

West Africa (28,577 – 7,822 BCE) Upper Pleistocene II — Deglaciation, Mega-Lakes, and Savanna Expansion

Geographic and Environmental Context

The Atlantic and inland belt from Senegal and Mauritania east through Mali, Niger, Burkina Faso, and Nigeria (western and central), plus the forest–savanna margins of Guinea, Sierra Leone, Liberia, Côte d’Ivoire, Ghana, Togo, and Benin.

Anchors: Senegal–Gambia valleys, Inland Niger Bend and Inland Delta (Timbuktu, Mopti, Gao), Middle Niger–Kainji basin, Jos Plateau, Hausaland (Kano, Katsina, Zaria), Upper Volta basin, Gold Coast forest margins, Futa Jallon highlands, Dahomey Gap.

• Deglaciation brought wetter pulses; Lake Chad expanded.

• Niger Inland Delta broadened; Senegal estuaries lengthened.

Climate & Environmental Shifts

• Bølling–Allerød (14.7–12.9 ka): wet pulse, savannas expanded.

• Younger Dryas (12.9–11.7 ka): drought shrank rivers.

• Early Holocene: African Humid Period onset.

Subsistence & Settlement

• Foragers exploited mega-lake fisheries; hippo, crocodile, mollusks abundant.

• Hunting on open savannas intensified.

• Semi-sedentary lake camps formed.

Technology & Material Culture

• Barbed bone harpoons (Niger, Chad); microliths.

• Baked clay figurines (earliest Jōmon–Nok parallels).

Movement & Interaction Corridors

• Lake Chad overflow connected Niger–Nile.

• Niger Valley provided cultural trunk.

Cultural & Symbolic Expressions

• Ritual deposits in middens; figurines mark symbolic systems.

Environmental Adaptation & Resilience

• Broad-spectrum foraging buffered climatic swings.

Transition

By 7,822 BCE, semi-sedentary foragers flourished in wetland savannas.

West Africa (7,821 – 6,094 BCE) Early Holocene — Wet-Phase Abundance and Proto-Horticulture

Geographic and Environmental Context

The Atlantic and inland belt from Senegal and Mauritania east through Mali, Niger, Burkina Faso, and Nigeria (western and central), plus the forest–savanna margins of Guinea, Sierra Leone, Liberia, Côte d’Ivoire, Ghana, Togo, and Benin.

Anchors: Senegal–Gambia valleys, Inland Niger Bend and Inland Delta (Timbuktu, Mopti, Gao), Middle Niger–Kainji basin, Jos Plateau, Hausaland (Kano, Katsina, Zaria), Upper Volta basin, Gold Coast forest margins, Futa Jallon highlands, Dahomey Gap.

• African Humid Period peak; Sahara green with savannas and lakes.

• Niger Inland Delta vast; Senegal–Volta valleys lush.

Climate & Environmental Shifts

• Monsoons strong; rainfall abundant.

• Lakes and rivers at highstand.

Subsistence & Settlement

• Foragers became semi-sedentary fishers–hunters.

• Early tending of wild millet, sorghum, fonio in Sahel/Upper Volta.

• Oil palm exploited in forest–savanna margins.

Technology & Material Culture

• Polished stone axes; ground slabs; first widespread pottery (~9000–7000 BCE).

• Net weights, fish traps.

Movement & Interaction Corridors

• Savanna corridors connected Senegal–Niger–Lake Chad.

• Early exchanges in beads, shells.

Cultural & Symbolic Expressions

• Rock art in central Sahara shows cattle/wildlife.

• Burials at river sites with ochre, ornaments.

Environmental Adaptation & Resilience

• Dual resource use (crops + fish) stabilized communities.

Transition

By 6,094 BCE, proto-horticulture was underway alongside abundant foraging.

Northern North America (6,093 – 4,366 BCE): Middle Holocene — Waterways, Woodcraft, and the Rise of Storage Societies

Geographic & Environmental Context

Northern North America formed a continuous, water-linked world from the Gulf of Alaska and the Fraser–Columbia canyons across the Great Lakes–St. Lawrence interior to the Lower Mississippi and Gulf estuaries, the Great Basin, and nearly all of California.
Mid-Holocene highstands stabilized estuaries, kelp forests, and lagoon systems on both coasts; inland, lake and river complexes matured (Great Lakes, St. Lawrence, Upper Mississippi), while playas and spring-fed wetlands punctuated the Great Basin and desert Southwest. Across this breadth, people organized life around fish rivers, shell shores, and seedlands—a hydrologic continent knitted by canoe, portage, and trail.

Climate & Environmental Shifts

The Hypsithermal warm phase brought long ice-free seasons on the North Pacific, strong but reliable monsoon/westerly regimes in the interior West, and moist, productive summers across the Great Lakes and Northeast.
Periodic interior dry spells reshaped foraging calendars on plateaus and basins, counterbalanced by refugia along major rivers and coasts. Sea levels approached near-modern outlines, locking in tidal flats, eelgrass meadows, and delta silts that sustained fisheries and shellfisheries at scale.

Subsistence & Settlement

A continental portfolio economy matured, with storage at its core:

• Northwest Pacific & Subarctic coast/plateau: canyon and estuary salmon fisheries supported large pit-house villages inland and substantial coastal house platforms; shellfish management (including clam gardens) and berry-patch tenure increased carrying capacity.

• Great Lakes–Northeast & Atlantic seaboard: intensified Archaic lifeways combined lake/river fisheries with broad plant use; along Superior, the Old Copper tradition added durable tools to fishing and woodworking; shell-ring and shell-heap communities expanded on the southern Atlantic margins.

• Gulf & Western North America: along the Lower Mississippi and Gulf estuaries, shell rings and river aggregation cycles grew; in California, island–mainland canoe commutes, fish weirs, and large shell-middens scaled up; in the Southwest and Great Basin, seed-processing economies, agave roasts, rabbit drives, and wetland micro-patch exploitation anchored seasonal rounds.

Everywhere, semi-sedentism deepened: villages clustered at fisheries and wetlands, fanning out to upland hunts and seedlands, then reconverging for curing, smoking, and exchange.

Technology & Material Culture

Toolkit fluency underwrote surplus:

• Heavy carpentry with standardized ground-stone adzes and chisels; hafted slate knives on outer coasts; composite toggling harpoons for sea mammals.

• Mass-capture gear—engineered net-weir complexes, fish fences, intertidal traps—paired with dugout canoes and, in some areas, sewn-plank precursors; interior basketry, nets, and cordage flourished.

• In the Great Lakes, native copper (adzes, awls, points) augmented woodcraft and butchery; across the West, millingstones, lined earth ovens, and roasting pits powered “low-level food production.”

• Shell and stone beadwork, labrets, bannerstones, and fine lithics circulated as display and exchange valuables.

Movement & Interaction Corridors

Water was the road system:

• Inside Passage canoe lanes stitched Gulf of Alaska islands to Haida Gwaii and the Fraser–Columbia trunk; inland, obsidian (e.g., Mount Edziza), ochre, and fine lithics moved along plateau rivers.

• The Great Lakes–St. Lawrence spine moved copper, fish, and crafted goods east–west; Niagara and Fox–Wisconsin–Mississippi routes linked interior basins.

• The Lower Mississippi and Gulf littoral tied shell-ring peoples to river valleys; westward, Rio Grande–Gila–Salt corridors connected deserts, plateaus, and coasts; California’s Channel and outer coasts ran island–mainland circuits.

These braided routes created redundancy—if a run failed or a drought tightened, another corridor supplied protein, salt, or tools.

Cultural & Symbolic Expressions

Material surplus fed prestige and ceremony:

• On the North Pacific, feasting middens, shell bead caches, rare lithics, and labrets signal rising lineage prestige tied to weir estates and canoe rights.

• In the interior and Northeast, mortuary elaboration, copper as status metal, and nascent earthworks mark growing ceremonial integrators.

• Along the Gulf and Atlantic, shell-ring ritual landscapes codified ancestry at water’s edge.

• Across the West and Southwest, rock art fluorescence (canyonlands to desert basins) mapped mythic hunts, trance, and water guardians; in wetlands, bog deposits and curated places expressed ancestor presence.

Environmental Adaptation & Resilience

Communities engineered stability through storage, scheduling, and tenure:

• High-capacity drying/smoking of salmon and marine fats; seed banks from nut mast and grass harvests; oils and dried meats as transportable capital.

• Territorial tenure over weirs, shell beds, berry grounds, and seed patches enforced sustainable yields and reciprocal access.

• Diversified procurement—coast + river + upland + desert micro-patch—buffered climate swings; exchange networks redistributed risk.

• Built features—clam gardens, weirs, trackways, ovens—were niche-engineering that increased productivity without agriculture.

Long-Term Significance

By 4,366 BCE, Northern North America had become a continent of storage-rich, semi-sedentary societies—masters of wood, water, and weirs.
From the salmon strongholds of the Northwest to the copper shores of Superior and the shell-ring estuaries of the Gulf and Atlantic, peoples forged rank-leaning economies, prestigious gift circuits, and durable settlement fabrics without farms or cities.
These Middle Holocene habits—surplus management, engineered ecotones, canoe logistics, and ceremonial redistribution—formed the deep grammar from which later Northwest Coast polities, Woodland earthwork traditions, and Pacific littoral chiefdoms would rise.

Northwestern North America

(6,093 – 4,366 BCE) Middle Holocene — Big Weirs, Big Villages, and Plank-House Precursors

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.

• Salmon-rich Fraser–Columbia canyons; sheltered Haida Gwaii bays; Cook Inlet–Kenai river mouths.

Climate & Environmental Shifts

• Hypsithermal warmth: long ice-free seasons, productive kelp forests; periodic interior dry spells managed by river focus.

Subsistence & Settlement

• Large pit-house villages on the interior plateaus; substantial coastal house platforms; higher population densities at canyon fisheries.

• Intertidal harvesting scaled up (clam gardens in some locales, shellfish management).

Technology & Material Culture

• Expanded net-weir complexes; standardized ground-stone adzes and chisels for heavy carpentry; hafted slate knives on outer coasts.

• Early plank-house forms emerged in some coastal nodes; composite toggling harpoons refined.

Movement & Interaction Corridors

• Coastwise canoe routes tied island archipelagos; interior riverine exchange in obsidian (e.g., Mount Edziza), ochre, and fine grained lithics.

Cultural & Symbolic Expressions

• Feasting middens; shell bead caches; display of rare lithics and labrets in some Gulf of Alaska contexts indicate rising prestige economies.

Environmental Adaptation & Resilience

• High-capacity storage, diversified procurement, and territorial tenure over weirs and berry patches stabilized communities across climate swings.

Transition

By 4,366 BCE, semi-sedentary salmon economies and woodworking fluency set the stage for fully ranked coastal societies.