The Maghreb Y chromosome pool (including both Berber and Arabic-speaking populations) may be summarized as follows, where only two haplogroups E1b1b-M215 and J comprise generally more than 80% of the total chromosomes: It can reach frequencies of up to 100% in the Greater Maghreb.
Maghrebis were known in medieval times as Roman Africans or Moors.
According to Michel Tribalat, a researcher at INED, there were more than 4.6 million people of Maghrebi origin (with at least one Maghrebi grandparent from Algeria, Morocco or Tunisia) living in France in 2011 (3 millions in 1999).
Note : for 2nd generation born in France only individuals under 60 are taken into account.
The middle facies belt is made of microbial-coral-stromatoporoid buildups.
The upper facies belt consists of the following shallow water lithofacies with , green algae, foraminifers, peloids and oolitic grainstones, and oolitic cryptomicrobial mudstone to grainstone.