Horn of Africa (Ethiopia: 96.6 million, Somalia: 10.4 million, Eritrea: 6.4 million, and Djibouti: 0.81 million). Regional studies on the Horn of Africa are carried out, among others, in the fields of Ethiopian Studies as well as Somali Studies. This peninsula is known by various names. In ancient and medieval times, the Horn of Africa was referred to as the "Bilad al Barbar" ("Land of the Berbers"). It is also known as the "Somali peninsula", or in the Somali language, "Geeska Afrika", "Jasiiradda Soomaali" or "Gacandhulka Soomaali". In other languages that are local or adjacent to the Horn of Africa, it is known
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