Greater Somalia Greater Somalia Greater Somalia (, ) comprises the regions in or near the Horn of Africa in which ethnic Somalis live and have historically inhabited. The territory historically encompassed British Somaliland, Italian Somaliland, French Somaliland, the Ogaden in the Ethiopian Empire, and the Northern Frontier District in the Colony and Protectorate of Kenya - at the present day, it encompasses Somalia, Somaliland, eastern Djibouti, the Somali region and Dire Dawa in Ethiopia, and the Lamu, Garissa, Wajir and Mandera Counties (all except Lamu formed part of the former North Eastern Province, which was abolished in 2013) in Kenya. Since the
Geology of Somalia and island arcs. In the Early Jurassic, the supercontinent Gondwana, which included Africa, began to break apart. The marine transgression of the Tethys Ocean flooded large parts of East Africa and Arabia and new sedimentary rock units were deposited. In the west of Somalia, the Cretaceous at the end of the Mesozoic brought crustal upwarping, which is preserved in the Yesomma Sandstone. Two major sedimentary basins began to form in Somalia during the Mesozoic, the Somali Coastal Basin and the Luuq-Mandera Basin, both filled with up to five kilometers of sedimentary rock. The basins formed due to the movements of