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Location: Luoyang (Loyang) Henan (Honan) China

North Africa (4,365 – 2,638 BCE) …

Years: 4365BCE - 2638BCE

North Africa (4,365 – 2,638 BCE) Late Neolithic / Chalcolithic — Aridification, Oasis Engineering, and Coastal Exchange

Geographic and Environmental Context

North Africa includes MoroccoAlgeriaTunisia (Ifriqiya)Libya (Tripolitania–Fezzan–Cyrenaica), and Western Sahara.

Anchors: the Atlas ranges (High/Middle/Anti-Atlas; Tell Atlas; Aurès), the Tell and Sahel coasts (Atlantic Morocco, Rif/Alboran, Kabylia, Ifriqiya, Syrte/Gulf of Sidra, Cyrenaica), the Saharan platforms and sand seas (Erg Chech, Grand Erg Occidental & Oriental, Tanezrouft), the oases and basins (Tafilalt, Draâ, Touat–Gourara–Tidikelt, M’zab, Wadi Igharghar, Fezzan (Wadi al-Ajyal, Ubari and Murzuq dunes)), and the trans-Saharan corridors toward Lake Chad, Niger Bend, and the Nile.
  • The African Humid Period waned after ~4000 BCE; dunes reactivated; lakes shrank; oasis chains  Fezzan (Wadi al-Ajyal), Touat–Gourara–Tidikelt, M’zab, Tafilalt, Draâ — consolidated.

  • Coastal plains (Ifriqiya, Riffian/Atlantic Morocco) remained productive with rainfall and aquifer flow.

Climate & Environmental Shifts

  • Increasing aridity; episodic pluvial remnant pulses; strong interannual variability inland.

Subsistence & Settlement

  • Oasis horticulture (date palms, pulses, gourds) + herding (camel adoption later, but dromedaries proto-managed late in this window).

  • Coastal Neolithics mixed gardens and fisheries; early salt extraction on lagoon margins.

  • Proto-caravan nodes emerged at Fezzan and western Saharan oases.

Technology & Material Culture

  • Pottery diversified; copper ornaments/tools traded in via Mediterranean and Nile; engineered foggaras/khettaras (proto-qanat) concepts incubated in Saharan oases late.

Movement & Interaction Corridors

  • Oasis stepping-stones across Fezzan–Hoggar–Air; coastal cabotage connected Ifriqiya, Cyrenaica, and Alboran shores; Atlas passes fed exchange between coast and interior.

Cultural & Symbolic Expressions

  • Cairn–tumuli fields; ancestor veneration at desert margins; coastal cult places at springs and capes.

Environmental Adaptation & Resilience

  • Vertical oasis agriculture (date–garden–field) + mobile herds stabilized calories; salt/fish preserved protein.

Transition

By 2,638 BCE, oasis–pastoral systems had replaced Green-Sahara lake economies; coasts brokered exotics and metals.

(4,365 – 2,638 BCE) Late Neolithic / Chalcolithic — Aridification, Oasis Engineering, and Coastal Exchange

Geographic & Environmental Context

  • The African Humid Period waned after ~4000 BCE; dunes reactivated; lakes shrank; oasis chains  Fezzan (Wadi al-Ajyal), Touat–Gourara–Tidikelt, M’zab, Tafilalt, Draâ — consolidated.

  • Coastal plains (Ifriqiya, Riffian/Atlantic Morocco) remained productive with rainfall and aquifer flow.

Climate & Environmental Shifts

  • Increasing aridity; episodic pluvial remnant pulses; strong interannual variability inland.

Subsistence & Settlement

  • Oasis horticulture (date palms, pulses, gourds) + herding (camel adoption later, but dromedaries proto-managed late in this window).

  • Coastal Neolithics mixed gardens and fisheries; early salt extraction on lagoon margins.

  • Proto-caravan nodes emerged at Fezzan and western Saharan oases.

Technology & Material Culture

  • Pottery diversified; copper ornaments/tools traded in via Mediterranean and Nile; engineered foggaras/khettaras (proto-qanat) concepts incubated in Saharan oases late.

Movement & Interaction Corridors

  • Oasis stepping-stones across Fezzan–Hoggar–Air; coastal cabotage connected Ifriqiya, Cyrenaica, and Alboran shores; Atlas passes fed exchange between coast and interior.

Cultural & Symbolic Expressions

  • Cairn–tumuli fields; ancestor veneration at desert margins; coastal cult places at springs and capes.

Environmental Adaptation & Resilience

  • Vertical oasis agriculture (date–garden–field) + mobile herds stabilized calories; salt/fish preserved protein.

Transition

By 2,638 BCE, oasis–pastoral systems had replaced Green-Sahara lake economies; coasts brokered exotics and metals.

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