Before revision: In 4000 BP, there may have been a population that traversed from Africa (e.g., West Africa or West-Central Africa), through the Strait of Gibraltar, into the Iberian peninsula , where admixing between Africans and Iberians (e.g., of northern Portugal, of southern Spain) occurred.
After revision: In 4000 BP, there may have been a population that traversed from Africa (e.g., West Africa or West-Central Africa), through the Strait of Gibraltar, into the Iberian Peninsula , where admixing between Africans and Iberians (e.g., of northern Portugal, of southern Spain) occurred.