The Horn of Africa shrublands extend throughout Ethiopia, Somalia, Djibouti, Eritrea and Kenya. The area is a matrix of mountain ranges and basins, which have been made famous by their geologic hyperactivity and salt production. The area was historically grazed; however, after the Ethiopian revolution, grazing lands were revoked from the Afar people and highland agriculturalists began cultivating the landscape. Shrubland areas are characterized by a composition of thorny and deciduous shrubs including simple-spined carissa (Carissa edulis), staff vine species (Maytenus arbutifolia), Cape myrtle (Myrsine Africana) and common olive (Olea europaea).