Horn of Africa covered the Simien and Bale Mountains but melted at the beginning of the Holocene. The mountains descend in a huge escarpment to the Red Sea and more steadily to the Indian Ocean. Socotra is a small island in the Indian Ocean off the coast of Somalia. Its size is 3,600 km (1,390 sq mi) and it is a territory of Yemen. The lowlands of the Horn are generally arid in spite of their proximity to the equator. This is because the winds of the tropical monsoons that give seasonal rains to the Sahel and the Sudan blow from the west.
Islam in Africa of the northern half of Africa, mainly concentrated in North Africa, the Horn of Africa and the Sahel, as well as West Africa. Islam has been in Africa for so long, since its emergence on the Arabian peninsula, that some scholars have argued that it is a traditional African religion. Although the majority of Muslims in Africa are Sunni or Sufi, the complexity of Islam in Africa is revealed in the various schools of thought, traditions, and voices that constantly contend for dominance in many African countries. Islam in Africa is not static and is constantly being reshaped by prevalent