The term Iberomaurusian (IBM) traditionally describes the late Upper Palaeolithic occupation of North-Western Africa, from Morocco (10° W) to Cyrenaica (22° E).
Following recent reviews, numerical ages for this techno-complex range between 22,000 and 11,500 calBP.
On the base of radiocarbon data, the long duration of IBM occupation can be divided into early (~22-16,000 calBP) and late (~16-11,500
... [Show full abstract] calBP) phases. The breaking point around 16,000 calBP, where C14 chronology shows a significant decrease of data, seems to be connected to a possible environmental shift during Heinrich Event 1.
At that time, many sequences document an important sedimentological change from a yellow/redish sediment (so-called Couche Rouge) to a grey sediment (so-called Escargotière). The change is additionally marked by a strong shift of subsistence pattern.
Even though current chrono-stratigraphical data support the Iberomaurusian dichotomy, diachronic variability in lithic material still lacks comprehensive analysis regarding raw material procurement, lithic production systems and subsistence strategies.